Powered by Deep Web Technologies
Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Propagation of polymer slugs through porous media  

SciTech Connect (OSTI)

This paper describes an experimental and theoretical study of the mechanisms governing polymer slug propagation through porous media. An analytical model taking into account the macromolecule exclusion from pore walls is proposed to predict rodlike polymer velocity in porous media and thus the spreading out of polydispersed polymer slugs. Under conditions where this wall exclusion is maximum, i.e. at low shear rates and polymer concentrations, the experiments show that xanthan propagation is effectively predicted by this model. At higher flow rates and polymer concentrations, the effects of hydrodynamic dispersion and viscous fingering are analyzed. A new fractionation method for determining molecular weight distribution of polymers used in EOR is proposed.

Lecourtier, J.; Chauveteau, G.

1984-09-01T23:59:59.000Z

2

Experimental and theoretical study of polymer flow in porous media  

SciTech Connect (OSTI)

In this paper, an extensive study is presented on the single-phase flow of xanthum/tracer slugs in a consolidated sandstone. The phenomena studied include polymer/tracer dispersion, excluded/inaccessible-volume effects, polymer adsorption, and viscous fingering. In some floods, there is also evidence of nonequilibrium effects. Macroscopic flow equations are derived that include terms to model all the behaviors listed above. A microscopic approach is also developed that describes certain features of polymer flow in porous media semiquantitatively.

Sorbie, K.S.; Parker, A.; Clifford, P.J.

1987-08-01T23:59:59.000Z

3

Method for dialysis on microchips using thin porous polymer membrane  

DOE Patents [OSTI]

Laser-induced phase-separation polymerization of a porous acrylate polymer is used for in-situ fabrication of dialysis membranes inside glass microchannels. A shaped 355 nm laser beam is used to produce a porous polymer membrane with a thickness of about 15 .mu.m, which bonds to the glass microchannel and forms a semi-permeable membrane. Differential permeation through a membrane formed with pentaerythritol triacrylate was observed and quantified by comparing the response of the membrane to fluorescein and fluorescently tagging 200 nm latex microspheres. Differential permeation was observed and quantified by comparing the response to rhodamine 560 and lactalbumin protein in a membrane formed with SPE-methylene bisacrylamide. The porous membranes illustrate the capability for the present technique to integrate sample cleanup into chip-based analysis systems.

Singh, Anup K. (San Francisco, CA); Kirby, Brian J. (San Francisco, CA); Shepodd, Timothy J. (Livermore, CA)

2009-05-19T23:59:59.000Z

4

Dialysis on microchips using thin porous polymer membranes  

DOE Patents [OSTI]

Laser-induced phase-separation polymerization of a porous acrylate polymer is used for in-situ fabrication of dialysis membranes inside glass microchannels. A shaped 355 nm laser beam is used to produce a porous polymer membrane with a thickness of about 15 .mu.m, which bonds to the glass microchannel and form a semi-permeable membrane. Differential permeation through a membrane formed with pentaerythritol triacrylate was observed and quantified by comparing the response of the membrane to fluorescein and fluorescently tagging 200 nm latex microspheres. Differential permeation was observed and quantified by comparing the response to rhodamine 560 and lactalbumin protein in a membrane formed with SPE-methylene bisacrylamide. The porous membranes illustrate the capability for the present technique to integrate sample cleanup into chip-based analysis systems.

Singh, Anup K. (San Francisco, CA); Kirby, Brian J. (San Francisco, CA); Shepodd, Timothy J. (Livermore, CA)

2007-09-04T23:59:59.000Z

5

Randomly charged polymers in porous environment  

E-Print Network [OSTI]

We study the conformational properties of charged polymers in a solvent in the presence of structural obstacles correlated according to a power law $\\sim x^{-a}$. We work within the continuous representation of a model of linear chain considered as a random sequence of charges $q_i=\\pm q_0$. Such a model captures the properties of polyampholytes -- heteropolymers comprising both positively and negatively charged monomers. We apply the direct polymer renormalization scheme and analyze the scaling behavior of charged polymers up to the first order of an $\\epsilon=6-d$, $\\delta=4-a$-expansion.

V. Blavatska; C. von Ferber

2013-11-22T23:59:59.000Z

6

A dual approach to tuning the porosity of porous organic polymers: controlling the porogen size and  

E-Print Network [OSTI]

. Consequently, the majority of POPs are interpenetrating networks with rela- tively low total pore volumesA dual approach to tuning the porosity of porous organic polymers: controlling the porogen size. Weston, Omar K. Farha,* Joseph T. Hupp* and SonBinh T. Nguyen* Porous organic polymers (POPs

7

An electrochemical route for making porous nickel oxide electrochemical capacitors  

SciTech Connect (OSTI)

Porous nickel oxide films were prepared by electrochemically precipitating nickel hydroxide and heating the hydroxide in air at 300 C. The resulting nickel oxide films behave as an electrochemical capacitor with a specific capacitance of 59 F/g electrode material. These nickel oxide films maintain high utilization at high rates of discharge (i.e., high power density) and have excellent cycle life. Porous cobalt oxide films were also synthesized. Although the specific capacitances of these films are approximately one-fifth that of the nickel oxide films, the results demonstrate the versatility of fabricating a wide range of porous metal oxide films using this electrochemical route for use in capacitor applications. Electrochemical capacitors have generated wide interest in recent years for use in high power applications (e.g., in a hybrid electric vehicle, where they are expected to work in conjunction with a conventional battery).

Srinivasan, V.; Weidner, J.W. [Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

1997-08-01T23:59:59.000Z

8

Multiple Regulated Assembly, Crystal Structures and Magnetic Properties of Porous Coordination Polymers with Flexible Ligands  

E-Print Network [OSTI]

polymers, although with inge- nious design, interpenetrated networks can give novel top- ologies and useful Coordination Polymers with Flexible Ligands Chang-Yan Sun,[a] Xiang-Jun Zheng,[a] Song Gao,[b] Li-Cun Li,[c] and Lin-Pei Jin*[a] Keywords: Cobalt / Coordination polymers / Magnetic properties / Nickel / Porous

Gao, Song

9

Porous polymeric materials for hydrogen storage  

DOE Patents [OSTI]

A porous polymer, poly-9,9'-spirobifluorene and its derivatives for storage of H.sub.2 are prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping; Liu, Di-Jia; Yuan, Shengwen; Yang, Junbing

2013-04-02T23:59:59.000Z

10

Uranium Oxide Aerosol Transport in Porous Graphite  

SciTech Connect (OSTI)

The objective of this paper is to investigate the transport of uranium oxide particles that may be present in carbon dioxide (CO2) gas coolant, into the graphite blocks of gas-cooled, graphite moderated reactors. The transport of uranium oxide in the coolant system, and subsequent deposition of this material in the graphite, of such reactors is of interest because it has the potential to influence the application of the Graphite Isotope Ratio Method (GIRM). The GIRM is a technology that has been developed to validate the declared operation of graphite moderated reactors. GIRM exploits isotopic ratio changes that occur in the impurity elements present in the graphite to infer cumulative exposure and hence the reactor’s lifetime cumulative plutonium production. Reference Gesh, et. al., for a more complete discussion on the GIRM technology.

Blanchard, Jeremy; Gerlach, David C.; Scheele, Randall D.; Stewart, Mark L.; Reid, Bruce D.; Gauglitz, Phillip A.; Bagaasen, Larry M.; Brown, Charles C.; Iovin, Cristian; Delegard, Calvin H.; Zelenyuk, Alla; Buck, Edgar C.; Riley, Brian J.; Burns, Carolyn A.

2012-01-23T23:59:59.000Z

11

Polymer-coated iron oxide nanoparticles for medical imaging  

E-Print Network [OSTI]

One of the most versatile and safe materials used in medicine are polymer-coated iron oxide nanoparticles. This dissertation describes several formulations for in vivo imaging applications. The paramagnetic polymer-coated ...

Chen, Suelin, Ph.D. Massachusetts Institute of Technology

2010-01-01T23:59:59.000Z

12

Solid polymer electrolyte composite membrane comprising laser micromachined porous support  

DOE Patents [OSTI]

A solid polymer electrolyte composite membrane and method of manufacturing the same. According to one embodiment, the composite membrane comprises a rigid, non-electrically-conducting support, the support preferably being a sheet of polyimide having a thickness of about 7.5 to 15 microns. The support has a plurality of cylindrical pores extending perpendicularly between opposing top and bottom surfaces of the support. The pores, which preferably have a diameter of about 5 microns, are made by laser micromachining and preferably are arranged in a defined pattern, for example, with fewer pores located in areas of high membrane stress and more pores located in areas of low membrane stress. The pores are filled with a first solid polymer electrolyte, such as a perfluorosulfonic acid (PFSA) polymer. A second solid polymer electrolyte, which may be the same as or different than the first solid polymer electrolyte, may be deposited over the top and/or bottom of the first solid polymer electrolyte.

Liu, Han (Waltham, MA); LaConti, Anthony B. (Lynnfield, MA); Mittelsteadt, Cortney K. (Natick, MA); McCallum, Thomas J. (Ashland, MA)

2011-01-11T23:59:59.000Z

13

DOI: 10.1002/chem.200901707 Bipyridinium Array-Type Porous Polymer Displaying Hydrogen Storage,  

E-Print Network [OSTI]

DOI: 10.1002/chem.200901707 Bipyridinium Array-Type Porous Polymer Displaying Hydrogen Storage applications in storage,[1] separation,[2] and catalysis.[3] Although the surface modification of the chan and 4.27.6 along [100], and a void space of about 41.4%. Hydrogen adsorption measure- ments at 77 K

Li, Jing

14

Highly efficient carbon dioxide capture with a porous organic polymer impregnated with  

E-Print Network [OSTI]

Highly efficient carbon dioxide capture with a porous organic polymer impregnated environmental crises such as global warming and ocean acidication, efficient carbon dioxide (CO2) capture As CO2 capture mate- rials, numerous solid adsorbents such as silica5 and carbon materials,6 metal

Paik Suh, Myunghyun

15

ENS'05 Paris, France, 14-16 December 2005 CONTROL POROUS PATTERN OF ANODIC ALUMINUM OXIDE  

E-Print Network [OSTI]

ENS'05 Paris, France, 14-16 December 2005 CONTROL POROUS PATTERN OF ANODIC ALUMINUM OXIDE BY FOILS simpler, and low cost method to fabricate porous pattern of the anodic aluminum oxide (AAO) based on the aluminum foils laminate approach were carried out. During our experiments, it was found that the pores

Paris-Sud XI, Université de

16

Solid polymer electrolyte composite membrane comprising plasma etched porous support  

DOE Patents [OSTI]

A solid polymer electrolyte composite membrane and method of manufacturing the same. According to one embodiment, the composite membrane comprises a rigid, non-electrically-conducting support, the support preferably being a sheet of polyimide having a thickness of about 7.5 to 15 microns. The support has a plurality of cylindrical pores extending perpendicularly between opposing top and bottom surfaces of the support. The pores, which preferably have a diameter of about 0.1 to 5 microns, are made by plasma etching and preferably are arranged in a defined pattern, for example, with fewer pores located in areas of high membrane stress and more pores located in areas of low membrane stress. The pores are filled with a first solid polymer electrolyte, such as a perfluorosulfonic acid (PFSA) polymer. A second solid polymer electrolyte, which may be the same as or different than the first solid polymer electrolyte, may be deposited over the top and/or bottom of the first solid polymer electrolyte.

Liu, Han (Waltham, MA); LaConti, Anthony B. (Lynnfield, MA)

2010-10-05T23:59:59.000Z

17

Heterogeneous electrocatalysis in porous cathodes of solid oxide fuel cells  

E-Print Network [OSTI]

A general physics-based model is developed for heterogeneous electrocatalysis in porous electrodes and used to predict and interpret the impedance of solid oxide fuel cells. This model describes the coupled processes of oxygen gas dissociative adsorption and surface diffusion of the oxygen intermediate to the triple phase boundary, where charge transfer occurs. The model accurately captures the Gerischer-like frequency dependence and the oxygen partial pressure dependence of the impedance of symmetric cathode cells. Digital image analysis of the microstructure of the cathode functional layer in four different cells directly confirms the predicted connection between geometrical properties and the impedance response. As in classical catalysis, the electrocatalytic activity is controlled by an effective Thiele modulus, which is the ratio of the surface diffusion length (mean distance from an adsorption site to the triple phase boundary) to the surface boundary layer length (square root of surface diffusivity div...

Fu, Y; Bertei, A; Qi, C; Mohanram, A; Pietras, J D; Bazant, M Z

2014-01-01T23:59:59.000Z

18

Porous polymeric materials for hydrogen storage  

DOE Patents [OSTI]

Porous polymers, tribenzohexazatriphenylene, poly-9,9'-spirobifluorene, poly-tetraphenyl methane and their derivatives for storage of H.sub.2 prepared through a chemical synthesis method. The porous polymers have high specific surface area and narrow pore size distribution. Hydrogen uptake measurements conducted for these polymers determined a higher hydrogen storage capacity at the ambient temperature over that of the benchmark materials. The method of preparing such polymers, includes oxidatively activating solids by CO.sub.2/steam oxidation and supercritical water treatment.

Yu, Luping (Hoffman Estates, IL); Liu, Di-Jia (Naperville, IL); Yuan, Shengwen (Chicago, IL); Yang, Junbing (Westmont, IL)

2011-12-13T23:59:59.000Z

19

Evaluation of charred porous polymers as a method of storm water pollution prevention for shipyards  

SciTech Connect (OSTI)

Most shipyards have viable Best Management Practices (BMPs) in place to mitigate the transport of heavy metals to surface waters by storm water. Despite aggressive efforts to control storm water, shipyards have come under increased regulatory pressure to further reduce concentrations of heavy metals, such as copper and nickel, in storm water discharges. The tightening of regulatory requirements warrants research into additional BMPs. The objectives of this research project were to: (1) determine the feasibility of placing a replaceable cartridge of adsorbent material within a storm water collection system; and (2) evaluate two commercially available charred porous polymer adsorbents for the removal of heavy metals from storm water. The results indicated that there are commercially available storm water treatment components which could be adapted to house a cartridge of porous adsorbent material.

Clark, G.E.

1998-08-01T23:59:59.000Z

20

Development of an oxidized porous silicon vacuum microtriode  

E-Print Network [OSTI]

the requirements for a gigatron cathode. In the present work, a porous sihcon-based approach is evaluated. The use of porous silicon reduces the size of a single emitter to the manometer scale, and a true two-dimensional array geometry can be approached. A wide...

Smith, Don Deewayne

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Effects of Combustor Rig Exposure on a Porous-Matrix Oxide Composite  

E-Print Network [OSTI]

Effects of Combustor Rig Exposure on a Porous-Matrix Oxide Composite Michael A. Mattoni, James Y combustor on microstructural stability and property retention of an all-oxide fiber-reinforced ceramic combustor rig under conditions that simulate the pertinent heat loads and combustion environ- ments.11

Zok, Frank

22

Preparation and electrochemical properties of multiwalled carbon nanotubes-nickel oxide porous composite for supercapacitors  

SciTech Connect (OSTI)

Porous nickel oxide/multiwalled carbon nanotubes (NiO/MWNTs) composite material was synthesized using sodium dodecyl phenyl sulfate as a soft template and urea as hydrolysis-controlling agent. Scanning electron microscopy (SEM) results show that the as-prepared nickel oxide nanoflakes aggregate to form a submicron ball shape with a porous structure, and the MWNTs with entangled and cross-linked morphology are well dispersed in the porous nickel oxide. The composite shows an excellent cycle performance at a high current of 2 A g{sup -1} and keeps a capacitance retention of about 89% over 200 charge/discharge cycles. A specific capacitance approximate to 206 F g{sup -1} has been achieved with NiO/MWNTs (10 wt.%) in 2 M KOH electrolyte. The electrical conductivity and the active sites for redox reaction of nickel oxide are significantly improved due to the connection of nickel nanoflakes by the long entangled MWNTs.

Zheng Yanzhen [College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China); Zhang Milin [College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China)]. E-mail: dhyzyz@yahoo.com.cn; Gao Peng [College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001 (China)

2007-09-04T23:59:59.000Z

23

Fabrication and testing of oxidized porous silicon field emitter strips  

E-Print Network [OSTI]

mechanism. Formation by Local Dissolution of Silicon Unagami proposed [29] that the formation of porous silicon occurs due to the dissolution of silicon at places restricted by a surface porous film and silicic acid formed during the dissolution reaction... anodized in the presence of HF electmlyte. The silicon wafer divides the electrochemical cell into front and rear half cells. Each of the cells was filled with the electrolyte which is a mixture of 1. 5:1 hydroflouric acid and ethanol. Ethanol is used...

Madduri, Vasanta Bhanu

1992-01-01T23:59:59.000Z

24

An Experimental Study of Micron-Size Zero-Valent Iron Emplacement in Permeable Porous Media Using Polymer-Enhanced Fluids  

SciTech Connect (OSTI)

At the Hanford Site, an extensive In Situ Redox Manipulation (ISRM) permeable reactive barrier was installed to prevent chromate from reaching the Columbia River. However, chromium has been detected in several wells, indicating a premature loss of the reductive capacity in the aquifer. One possible cause for premature chromate breakthrough is associated with the presence of high-permeability zones in the aquifer. In these zones, groundwater moves relatively fast and is able to oxidize iron more rapidly. There is also a possibility that the high-permeability flow paths are deficient in reducing equivalents (e.g. reactive iron), required for barrier performance. One way enhancement of the current barrier reductive capacity can be achieved is by the addition of micron-scale zero-valent iron to the high-permeability zones within the aquifer. The potential emplacement of zero-valent iron (Fe0) into high-permeability Hanford sediments (Ringold Unit E gravels) using shear-thinning fluids containing polymers was investigated in three-dimensional wedge-shaped aquifer models. Polymers were used to create a suspension viscous enough to keep the Fe0 in solution for extended time periods to improve colloid movement into the porous media without causing a permanent detrimental decrease in hydraulic conductivity. Porous media were packed in the wedge-shaped flow cell to create either a heterogeneous layered system with a high-permeability zone in between two low-permeability zones or a high-permeability channel surrounded by low-permeability materials. The injection flow rate, polymer type, polymer concentration, and injected pore volumes were determined based on preliminary short- and long-column experiments.

Oostrom, Mart; Wietsma, Thomas W.; Covert, Matthew A.; Vermeul, Vince R.

2005-12-22T23:59:59.000Z

25

Porous anodic aluminum oxide scaffolds; formation mechanisms and applications  

E-Print Network [OSTI]

Nanoporous anodic aluminium oxide (AAO) can be created with pores that self-assemble into ordered configurations. Nanostructured metal oxides have proven to be very useful as scaffolds for growth of nanowires and nanotubes ...

Oh, Jihun

2010-01-01T23:59:59.000Z

26

Highly Conductive and Porous Activated Reduced Graphene Oxide Films for High-Power Supercapacitors  

E-Print Network [OSTI]

Highly Conductive and Porous Activated Reduced Graphene Oxide Films for High-Power Supercapacitors for a free-standing carbon film reported to date. A two-electrode supercapacitor using these carbon films. KEYWORDS: Graphene, flexible film, chemical activation, supercapacitors Free-standing thin film materials

27

Oral: Division of Polymeric Materials: Science & Engineering: Nano-and Micro-Scale Porous Polymer-Based Systems. Synthesis of [Bis(pyridine)salen]ZnII  

E-Print Network [OSTI]

Oral: Division of Polymeric Materials: Science & Engineering: Nano- and Micro-Scale Porous Polymer envisioned for these polymeric materials, enantioselectivity is one of the most challenging to incorporate.4/separation are often anticipated.5,6 Ideally, porous polymeric materials with chiral functionalities along their pores

28

Solid oxide fuel cells having porous cathodes infiltrated with oxygen-reducing catalysts  

DOE Patents [OSTI]

Solid-oxide fuel cells include an electrolyte and an anode electrically coupled to a first surface of the electrolyte. A cathode is provided, which is electrically coupled to a second surface of the electrolyte. The cathode includes a porous backbone having a porosity in a range from about 20% to about 70%. The porous backbone contains a mixed ionic-electronic conductor (MIEC) of a first material infiltrated with an oxygen-reducing catalyst of a second material different from the first material.

Liu, Meilin; Liu, Ze; Liu, Mingfei; Nie, Lifang; Mebane, David Spencer; Wilson, Lane Curtis; Surdoval, Wayne

2014-08-12T23:59:59.000Z

29

Mechanical Degradation Onset of Polyethylene Oxide Used as a Hydrosoluble Model Polymer  

E-Print Network [OSTI]

Mechanical Degradation Onset of Polyethylene Oxide Used as a Hydrosoluble Model Polymer Degradation Onset of Polyethylene Oxide Used as a Hydrosoluble Model Polymer for Enhanced Oil Recovery and for both dilute and semi dilute polyethylene oxide aqueous solutions. It reveals that the exponent k

Boyer, Edmond

30

Electrochemical fabrication and optical properties of porous tin oxide films with structural colors  

SciTech Connect (OSTI)

Photonic crystals with porous features not only provide the capability to control light but also enable structural colors that are environmentally sensitive. Here, we report a novel kind of tin oxide-based photonic crystal featuring periodically arranged air pores fabricated by the periodic anodization of tin foil. The existence of a photonic band gap in the fabricated structure is verified by its vivid color, and its reflective spectra which are responsive to environmental stimuli. Furthermore, the sample colors (i.e., the photonic band gap positions) can be easily adjusted by manipulating the anodization parameters. The theoretical modeling results of these tin oxide photonic crystals agree well with the reported experimental ones.

Cheng, Hua; Shu, Shiwei; Lee, Chris; Zeng, Shanshan [Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 83 Tat Chee Av. Hong Kong (Hong Kong); Centre for Functional Photonics, City University of Hong Kong, 83 Tat Chee Av. Hong Kong (Hong Kong); Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong); Lu, Zhouguang [Department of Materials Science and Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055 (China); Lu, Jian, E-mail: jianlu@cityu.edu.hk, E-mail: yangli@cityu.edu.hk [Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon (Hong Kong); Centre for Advanced Structural Materials, City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen (China); Li, Yang Yang, E-mail: jianlu@cityu.edu.hk, E-mail: yangli@cityu.edu.hk [Center of Super-Diamond and Advanced Films (COSDAF), City University of Hong Kong, 83 Tat Chee Av. Hong Kong (Hong Kong); Centre for Functional Photonics, City University of Hong Kong, 83 Tat Chee Av. Hong Kong (Hong Kong); Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue (Hong Kong); City University of Hong Kong Shenzhen Research Institute, 8 Yuexing 1st Road, Shenzhen Hi-Tech Industrial Park, Nanshan District, Shenzhen (China)

2014-10-21T23:59:59.000Z

31

Mechanical modeling of porous oxide fuel pellet A Test Problem  

SciTech Connect (OSTI)

A poro-elasto-plastic material model has been developed to capture the response of oxide fuels inside the nuclear reactors under operating conditions. Behavior of the oxide fuel and variation in void volume fraction under mechanical loading as predicted by the developed model has been reported in this article. The significant effect of void volume fraction on the overall stress distribution of the fuel pellet has also been described. An important oxide fuel issue that can have significant impact on the fuel performance is the mechanical response of oxide fuel pellet and clad system. Specifically, modeling the thermo-mechanical response of the fuel pellet in terms of its thermal expansion, mechanical deformation, swelling due to void formation and evolution, and the eventual contact of the fuel with the clad is of significant interest in understanding the fuel-clad mechanical interaction (FCMI). These phenomena are nonlinear and coupled since reduction in the fuel-clad gap affects thermal conductivity of the gap, which in turn affects temperature distribution within the fuel and the material properties of the fuel. Consequently, in order to accurately capture fuel-clad gap closure, we need to account for fuel swelling due to generation, retention, and evolution of fission gas in addition to the usual thermal expansion and mechanical deformation. Both fuel chemistry and microstructure also have a significant effect on the nucleation and growth of fission gas bubbles. Fuel-clad gap closure leading to eventual contact of the fuel with the clad introduces significant stresses in the clad, which makes thermo-mechanical response of the clad even more relevant. The overall aim of this test problem is to incorporate the above features in order to accurately capture fuel-clad mechanical interaction. Because of the complex nature of the problem, a series of test problems with increasing multi-physics coupling features, modeling accuracy, and complexity are defined with the objective of accurate simulation of fuel-clad mechanical interaction subjected to a wide-range of thermomechanical stimuli.

Nukala, Phani K [ORNL; Barai, Pallab [ORNL; Simunovic, Srdjan [ORNL; Ott, Larry J [ORNL

2009-10-01T23:59:59.000Z

32

Correlation between the Indium Tin Oxide morphology and the performances of polymer light-emitting diodes  

E-Print Network [OSTI]

: This paper reports on performance enhancement of polymer light-emitting diodes (PLEDs) based on poly(2,5-bis. Keywords : Polymer light emitting diode; Indium tin oxide; Atomic force microscopy; Rutherford backscattering spectroscopy 1. Introduction Polymer light-emitting diodes (PLEDs) have received worldwide

Paris-Sud XI, Université de

33

Oxide-supported PtCo alloy catalyst for intermediate temperature polymer electrolyte fuel cells  

E-Print Network [OSTI]

1 Oxide-supported PtCo alloy catalyst for intermediate temperature polymer electrolyte fuel cells reduction reaction in a polymer electrolyte fuel cell (PEMFC) operating between 80° and 110 °C at different, Fuel cells, Oxygen reduction reaction, Doped Ti-oxide support, Intermediate temperature

Boyer, Edmond

34

Tubular solid oxide fuel cells with porous metal supports and ceramic interconnections  

DOE Patents [OSTI]

An intermediate temperature solid oxide fuel cell structure capable of operating at from 600.degree. C. to 800.degree. C. having a very thin porous hollow elongated metallic support tube having a thickness from 0.10 mm to 1.0 mm, preferably 0.10 mm to 0.35 mm, a porosity of from 25 vol. % to 50 vol. % and a tensile strength from 700 GPa to 900 GPa, which metallic tube supports a reduced thickness air electrode having a thickness from 0.010 mm to 0.2 mm, a solid oxide electrolyte, a cermet fuel electrode, a ceramic interconnection and an electrically conductive cell to cell contact layer.

Huang, Kevin (Export, PA); Ruka, Roswell J. (Pittsburgh, PA)

2012-05-08T23:59:59.000Z

35

Synthesis of Highly Porous Catalytic Layers for Polymer Electrolyte Fuel Cell Based on Carbon Aerogels  

E-Print Network [OSTI]

Aerogels J. Mariea , S. Berthon-Fabrya , P. Acharda , M. Chatenetb , E. Chainetb , R. Pirardc , N. Cornetd and characterized carbon aerogels which exhibit high surface area, high porous volume and adjustable pore carbon aerogels with 2 different Nafion loadings. Finally, we characterized the structure

Paris-Sud XI, Université de

36

Enhanced room temperature oxidation in silicon and porous silicon under 10 keV x-ray irradiation  

E-Print Network [OSTI]

is monitored by ellipsometry and interferometric reflectance spectroscopy. Fourier transform infrared FTIR samples used in this work were boron doped p-type Si 100 , 0.01­0.02 cm. Porous silicon films were solution to remove the native oxide and subse- quently rinsed with de-ionized water and dried under nitro

Weiss, Sharon

37

Monodisperse porous polymer particles containing macrocyclic ether as a new class of sorbent for SR(II) separation  

SciTech Connect (OSTI)

Strontium{sup 90} is one of the typical fission products that may be found in high level liquid waste (HLLW). Separation of Sr{sup 90} prior to the vitrification is beneficial to the final treatment of solid radioactive waste. In this study, a new class of sorbent for Sr(II) was developed by loading the macrocyclic ether DtBuCH18C6 into the monodisperse porous polymer particles (MPPPs). The MPPPs are well-known as a promising chromatographic material due to the uniform particle size, porous morphology, good compatibility with organic extractants, and rigid matrix. The structure and micro-morphology of the sorbent particles were characterized. The adsorption behavior towards Sr(II) in HNO{sub 3} media was investigated by both batch and column experiments. High adsorption efficiency and selective separation of Sr(II) was obtained. The sorbent particles can be recycled for at least several times before obvious lose of the adsorption ability. This kind of sorbent possesses the potential to be used for strontium separation in radioactive liquid waste.

Leng, Yuxiao; Bai, Feifei [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China); Faculty of Chemical Science and Engineering, China University of Petroleum, Beijing 100084 (China); Ye, Gang; Wei, Jichao; Wang, Jianchen; Chen, Jing [Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084 (China)

2013-07-01T23:59:59.000Z

38

Oxidative chemical vapor deposition of conductive polymers for use in novel photovoltaic device architectures  

E-Print Network [OSTI]

The conductive polymer poly(3,4-ethylenedioxythiophene), (PEDOT), deposited via oxidative chemical vapor deposition (oCVD) has been investigated for use in organic electronic devices. The oCVD process as well as the ...

Howden, Rachel M. (Rachel Mary)

2013-01-01T23:59:59.000Z

39

Studies on phenol-formaldehyde crosslinked polymer gels in bulk and in porous media  

SciTech Connect (OSTI)

The general conditions for gel formation by phenol-formaldehyde polymer solutions have been examined in studies with three acrylamide polymers. Contrary to an earlier report, polymer crosslinking is found to take place over a wide interval of pH. While the gelation time is relatively insensitive to the concentrations of phenol and formaldehyde or pH, it is strongly influenced by the temperature and the nature of the polymer. These gelants display good infectivity in corefloods and slim-tube experiments at temperatures up to 140 C. On the other hand, the partitioning of phenol into crude oil is found to be a significant issue for the propagation of these gelants. The use of a phenol pre-flush of the formation is shown by numerical modeling to be a potentially viable solution for this problem.

Albonico, P.; Bartosek, M.; Malandrino, A.; Bryant, S.; Lockhart, T.P.

1995-11-01T23:59:59.000Z

40

Zinc Oxide Nanowire As an Electron-Extraction Layer for Broadband Polymer Photodetectors with an Inverted Device Structure  

E-Print Network [OSTI]

of the nanoscale morphology of the interpenetrating electron donor/acceptor networks, the detectivity of solutionZinc Oxide Nanowire As an Electron-Extraction Layer for Broadband Polymer Photodetectors,*, and Yong Cao§ Department of Polymer Engineering, College of Polymer Science and Polymer Engineering

Wang, Deli

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Diorganosilacetylene-alt-diorganosilvinylene polymers and a process densifying porous silicon-carbide bodies  

DOE Patents [OSTI]

The present invention provides linear organosilicon polymers including acetylene and vinylene moieties, and a process for their preparation. These diorganosilacetylene-alt-diorganosilvinylene linear polymers can be represented by the formula: --[--(R.sup.1)(R.sup.2)Si--C.tbd.C--(R.sup.3)(R.sup.4)Si--CH=CH--].sub.n-- , wherein n.gtoreq.2; and each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently selected from the group consisting of hydrogen, halogen, alkyl, alkenyl, aryl, and aralkyl radicals. The polymers are soluble in organic solvents, air stable, and can be pulled into fibers or cast into films. They can be thermally converted into silicon carbide ceramic materials.

Barton, Thomas J. (Ames, IA); Ijadi-Maghsoodi, Sina (Ames, IA); Pang, Yi (Ames, IA)

1994-05-17T23:59:59.000Z

42

List of Journal Publications (updated April 2014) R. Justin, B. Chen*: Strong and conductive polymer-reduced graphene oxide  

E-Print Network [OSTI]

polymer-reduced graphene oxide nanocomposites for transdermal drug deliveyr. Journal of Materials*: Characterisation and drug release performance of biodegradable chitosan-graphene oxide nanocomposites. Carbohydrate Polymers. 2014, 103, 70-80. · R. Justin, B. Chen*: Body temperature reduction of graphene oxide through

Ojovan, Michael

43

The measurement of the shear modulus for polymer porous layer with two microphones  

E-Print Network [OSTI]

to sound-absorbing materials, such as glass wool and plastic foams, for noise control applications without any mechanical excitation. Keywords : polymer foam; shear modulus; biot-johnson-allard theory impedance in normal incidence. The layered media is an impervious plate fixed on thin acoustic foam backed

Boyer, Edmond

44

Slow dynamics of nanocomposite polymer aerogels as revealed by X-ray photocorrelation spectroscopy (XPCS)  

SciTech Connect (OSTI)

We report on a novel slow dynamics of polymer xerogels, aerogels, and nanocomposite aerogels with iron oxide nanoparticles, as revealed by X-ray photon correlation spectroscopy. The polymer aerogel and its nanocomposite aerogels, which are porous in nature, exhibit hyper-diffusive dynamics at room temperature. In contrast, non-porous polymer xerogels exhibit an absence of this peculiar dynamics. This slow dynamical process has been assigned to a relaxation of the characteristic porous structure of these materials and not to the presence of nanoparticles.

Hernández, Rebeca, E-mail: rhernandez@ictp.csic.es, E-mail: aurora.nogales@csic.es; Mijangos, Carmen [Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva, 3, 28006 Madrid (Spain)] [Instituto de Ciencia y Tecnología de Polímeros, ICTP-CSIC, Juan de la Cierva, 3, 28006 Madrid (Spain); Nogales, Aurora, E-mail: rhernandez@ictp.csic.es, E-mail: aurora.nogales@csic.es; Ezquerra, Tiberio A. [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain)] [Instituto de Estructura de la Materia, IEM-CSIC, Serrano 121, 28006 Madrid (Spain); Sprung, Michael [Petra III at DESY, Notkestr. 85, 22607 Hamburg (Germany)] [Petra III at DESY, Notkestr. 85, 22607 Hamburg (Germany)

2014-01-14T23:59:59.000Z

45

acid polymers highly: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of Highly Porous Catalytic Layers for Polymer Electrolyte Fuel Cell Based on Carbon Aerogels Physics Websites Summary: Synthesis of Highly Porous Catalytic Layers for Polymer...

46

Methods for removing contaminant matter from a porous material  

DOE Patents [OSTI]

Methods of removing contaminant matter from porous materials include applying a polymer material to a contaminated surface, irradiating the contaminated surface to cause redistribution of contaminant matter, and removing at least a portion of the polymer material from the surface. Systems for decontaminating a contaminated structure comprising porous material include a radiation device configured to emit electromagnetic radiation toward a surface of a structure, and at least one spray device configured to apply a capture material onto the surface of the structure. Polymer materials that can be used in such methods and systems include polyphosphazine-based polymer materials having polyphosphazine backbone segments and side chain groups that include selected functional groups. The selected functional groups may include iminos, oximes, carboxylates, sulfonates, .beta.-diketones, phosphine sulfides, phosphates, phosphites, phosphonates, phosphinates, phosphine oxides, monothio phosphinic acids, and dithio phosphinic acids.

Fox, Robert V. (Idaho Falls, ID) [Idaho Falls, ID; Avci, Recep (Bozeman, MT) [Bozeman, MT; Groenewold, Gary S. (Idaho Falls, ID) [Idaho Falls, ID

2010-11-16T23:59:59.000Z

47

Inorganic Metal Oxide/Organic Polymer Nanocomposites And Method Thereof  

DOE Patents [OSTI]

A synthetic method for preparation of hybrid inorganic/organic energetic nanocomposites is disclosed herein. The method employs the use of stable metal in organic salts and organic solvents as well as an organic polymer with good solubility in the solvent system to produce novel nanocomposite energetic materials. In addition, fuel metal powders (particularly those that are oxophilic) can be incorporated into composition. This material has been characterized by thermal methods, energy-filtered transmission electron microscopy (EFTEM), N.sub.2 adsoprtion/desorption methods, and Fourier-Transform (FT-IR) spectroscopy. According to these characterization methods the organic polymer phase fills the nanopores of the material, providing superb mixing of the component phases in the energetic nanocomposite.

Gash, Alexander E. (Livermore, CA); Satcher, Joe H. (Patterson, CA); Simpson, Randy (Livermore, CA)

2004-11-16T23:59:59.000Z

48

Inorganic metal oxide/organic polymer nanocomposites and method thereof  

DOE Patents [OSTI]

A synthetic method for preparation of hybrid inorganic/organic energetic nanocomposites is disclosed herein. The method employs the use of stable metal inorganic salts and organic solvents as well as an organic polymer with good solubility in the solvent system to produce novel nanocomposite energetic materials. In addition, fuel metal powders (particularly those that are oxophillic) can be incorporated into composition. This material has been characterized by thermal methods, energy-filtered transmission electron microscopy (EFTEM), N.sub.2 adsoprtion/desorption methods, and Fourier-Transform (FT-IR) spectroscopy. According to these characterization methods the organic polymer phase fills the nanopores of the composite material, providing superb mixing of the component phases in the energetic nanocomposite.

Gash, Alexander E.; Satcher, Joe H.; Simpson, Randy

2004-03-30T23:59:59.000Z

49

Integrated feature scale modeling of plasma processing of porous and solid SiO2 . II. Residual fluorocarbon polymer stripping  

E-Print Network [OSTI]

fluorocarbon polymer stripping and barrier layer deposition Arvind Sankarana) Department of Chemical from trenches following etching using fluorocarbon plasmas and the deposition of a continuous barrier these issues, reactions mechanisms for plasma stripping of fluorocarbon polymer using oxygen containing plasmas

Kushner, Mark

50

Porous Materials Porous Materials  

E-Print Network [OSTI]

1 Porous Materials x Porous Materials · Physical properties * Characteristic impedance p = p 0 e -jk xa- = vej[ ] p x - j ; Zc= p ve = c ka 0k = c 1-j #12;2 Porous Materials · Specific acoustic impedance Porous Materials · Finite thickness ­ blocked p e + -jk (x-d)a p e - jk (x-d)a d x #12

Berlin,Technische Universität

51

Mullite/Alumina Mixtures for Use as Porous Matrices in Oxide Fiber Composites  

E-Print Network [OSTI]

ceramic composites. Conditions for the deflection of a matrix crack at a fiber-matrix interface are used particle mixtures of mullite and alumina are assessed as candidate matrixes for use in porous matrix to identify the combinations of modulus and toughness of the fibers and the matrix for which damage

Zok, Frank

52

Reduced bleaching in organic nanofibers by bilayer polymer/oxide coating  

SciTech Connect (OSTI)

Para-hexaphenylene (p-6P) molecules exhibit a characteristic photoinduced reaction (bleaching) resulting in a decrease in luminescence intensity upon UV light exposure, which could render the technological use of the nanofibers problematic. In order to investigate the photoinduced reaction in nanofibers, optical bleaching experiments have been performed by irradiating both pristine and coated nanofibers with UV light. Oxide coating materials (SiO{sub x} and Al{sub 2}O{sub 3}) were applied onto p-6P nanofibers. These treatments caused a reduction in the bleaching reaction but in addition, the nanofiber luminescence spectrum was significantly altered. It was observed that some polymer coatings [a statistical copolymer of tetrafluoroethylene and 2,2-bis-trifluoromethyl-4,5-difluoro-1,3-dioxole, P(TFE-PDD), and poly(methyl methacrylate), PMMA] do not interfere with the luminescence spectrum from the p-6P but are not effective in stopping the bleaching. Bilayer coatings with first a polymer material, which should work as a protection layer to avoid modifications of the p-6P luminescence spectrum, and second an oxide layer used as oxygen blocker were tested and it was found that a particular bilayer polymer/oxide combination results in a significant reduction in bleaching without affecting significantly the emission spectrum from the nanofibers.

Tavares, L.; Kjelstrup-Hansen, J.; Rubahn, H.-G. [NanoSyd, Mads Clausen Institute, University of Southern Denmark, Alsion 2, DK-6400 Soenderborg (Denmark); Sturm, H. [Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, D-12205 Berlin (Germany)

2010-05-15T23:59:59.000Z

53

A MULTI-LENGTH SCALE APPROACH TO CORRELATING SOLID OXIDE FUEL CELL POROUS CATHODE MICROSTRUCTURE TO ELECTROCHEMICAL PERFORMANCE  

E-Print Network [OSTI]

........................................................................................................27 3 COMPREHENSIVE QUANTIFICATION OF POROUS LSCF CATHODE MICROSTRUCTURE AND ELECTROCHEMICAL IMPEDANCE

Florida, University of

54

Semipermeable polymers and method for producing same  

DOE Patents [OSTI]

A polyamide membrane comprising reaction product of an anhydrous solution comprising an anhydrous solvent, at least one polyfunctional secondary amine and a pre-polymer deposition catalyst; and an anhydrous, organic solvent solution comprising a polyfunctional aromatic amine-reactive reactant comprising one ring. A composite semipermeable membrane comprising the polyamide membrane on a porous support. A method of making a composite semipermeable membrane by coating a porous support with an anhydrous solution comprising an anhydrous solvent, a polyfunctional secondary amine and a pre-polymer deposition catalyst, to form an activated pre-polymer layer on the porous support and contacting the activated pre-polymer layer with an anhydrous, organic solvent solution comprising a polyfunctional amine-reactive reactant to interfacially condense the amine-reactive reactant with the polyfunctional secondary amine, thereby forming a cross-linked, interfacial polyamide layer on the porous support. A method of impregnating a composite semipermeable membrane with nanoparticles selected from heavy metals and/or oxides of heavy metals.

Buschmann, Wayne E. (Boulder, CO)

2012-04-03T23:59:59.000Z

55

Systems and strippable coatings for decontaminating structures that include porous material  

DOE Patents [OSTI]

Methods of removing contaminant matter from porous materials include applying a polymer material to a contaminated surface, irradiating the contaminated surface to cause redistribution of contaminant matter, and removing at least a portion of the polymer material from the surface. Systems for decontaminating a contaminated structure comprising porous material include a radiation device configured to emit electromagnetic radiation toward a surface of a structure, and at least one spray device configured to apply a capture material onto the surface of the structure. Polymer materials that can be used in such methods and systems include polyphosphazine-based polymer materials having polyphosphazine backbone segments and side chain groups that include selected functional groups. The selected functional groups may include iminos, oximes, carboxylates, sulfonates, .beta.-diketones, phosphine sulfides, phosphates, phosphites, phosphonates, phosphinates, phosphine oxides, monothio phosphinic acids, and dithio phosphinic acids.

Fox, Robert V. (Idaho Falls, ID); Avci, Recep (Bozeman, MT); Groenewold, Gary S. (Idaho Falls, ID)

2011-12-06T23:59:59.000Z

56

Iron porphyrin polymer films: Materials for the modification of electrode surfaces and the detection of nitric oxide  

SciTech Connect (OSTI)

We are currently investigating a new method for the detection and quantification of nitric oxide (NO) based on a carbon electrode chemically modified with an iron porphyrin polymer film. Commercially available vinyl-substituted iron porphyrin monomers can be polymerized directly onto electrode surfaces through a published electrochemical polymerization process. We are also developing a synthesis for a new vinyl-substituted monomer, iron 5,10,15-triphenyl-20-vinyl porphyrin chloride, in hopes of improving polymer film stability. The electrochemistry of NO is also being investigated at electrodes chemically modified with an iron porphyrin polymer film. We are studying the catalytic oxidation of iron porphyrin bound NO to nitrate by molecular oxygen. The reaction with molecular oxygen is preceded by a one electron reduction of the iron porphyrin-NO complex. If currents proportional to nitric oxide concentration can be measured, a new NO electrochemical sensor will be designed.

McGuire, M.; Drew, S.M. [Carleton College, Northfield, MN (United States)

1996-10-01T23:59:59.000Z

57

Improved porous mixture of molybdenum nitride and tantalum oxide as a charge storage material  

SciTech Connect (OSTI)

High surface area {gamma}-molybdenum nitride has shown promise as a charge storage material. The addition of amorphous tantalum oxide to the molybdenum nitride system not only improves the film cohesion tremendously, but also widens the voltage stability window from 0.8 to 1.1 V. This occurs without adversely effecting the capacitance. Ultracapacitors, also called supercapacitors or electrochemical capacitors, are high power storage devices which have found application in products as diverse as cardiac pacemakers, cellular phones, electric vehicles, and air bags.

Deng, C.Z.; Pynenburg, R.A.J.; Tsai, K.C. [Pinnacle Research Inst., Inc., Los Gatos, CA (United States)

1998-04-01T23:59:59.000Z

58

Ring Walking/Oxidative Addition Reactions for the Controlled Synthesis of Conjugated Polymers  

SciTech Connect (OSTI)

Power conversion efficiencies of plastic solar cells depend strongly on the molecular weight characteristics of the semiconducting polymers used for their fabrication. The synthesis of these materials typically relies on transition metal mediated catalytic reactions. In many instances, the ideal structures cannot be attained because of deficiencies in these reactions, particularly when it comes to being able to achieve high number average molecular weights and narrow molecular weight distributions. Another important conjugated polymer structure of interest is one in which a single functional group is attached at the end group of the chain. Such systems would be ideal for modifying surface properties at interfaces and for labeling biomolecular probes used in fluorescent biosensors. To respond to the challenges above, our efforts have centered on the design of homogenous transition metal complexes that are easy to prepare and effective in carrying out living, or quasi-living, condensative chain polymerization reactions. The key mechanistic challenge for the success of this reaction is to force the insertion of one monomer unit at a time via a process that involves migration of the transition metal-containing fragment to one terminus of the polymer chain. Chain growth characteristics are therefore favored when the metal does not dissociate from the newly formed reductive elimination product. We have proposed that dissociation is disfavored by the formation of a Ď?-complex, in which the metal can sample various locations of the electronically delocalized framework, a process that we term â??ring-walkingâ?ť, and find the functionality where oxidative addition takes place. Success has been achieved in the nickel-mediated cross coupling reaction of Grignard reagents with aromatic halides by using bromo[1,2-bis(diphenylphosphino)ethane]phenylnickel. This reagent can yield poly(thiophene)s (one of the most widely used type of polymer in plastic solar cells) with excellent stereoregularity and molecular weight distributions with polydispersities that are consistent with a living polymerization sequence. Another important objective of this program concerned the use of these new catalysts and improved mechanistic insight for the synthesis of specific polymeric materials with prespecified properties.

Bazan, Guillermo C

2012-04-03T23:59:59.000Z

59

Peculiarities of formation of phase composition, porous structure, and catalytic properties of tungsten oxide-based macroporous materials fabricated by sol–gel synthesis  

SciTech Connect (OSTI)

The method of template sol–gel synthesis of tungsten oxide-based macroporous materials using ‘core–shell’ latex particles as colloid templates is described. The chemical composition and structural characteristics of the synthesized macroporous oxide systems have been investigated. The peculiarities of formation of material phase composition and macroporous structure under different template thermal destruction conditions have been revealed. An optimal method of a targeted synthesis of the crystalline tungsten(VI) oxide having a defect-free macroporous structure (average pore size 160 nm) and efficient catalytic properties under organic liquid phase oxidation conditions has been suggested. The prospects of the fabricated material application as catalysts of hydrothermal oxidation of radionuclide organic complexes at radioactive waste decontamination have been demonstrated. - Highlights: • Macroporous tungsten oxides were fabricated via sol–gel process. • The correlation between synthesis conditions and composition was determined. • Influence of synthesis conditions on porous structure has been explained. • The effects of template thermodestruction have been set up. • High potential of such materials for catalysis applications has been shown.

Papynov, Evgeniy Konstantinovich, E-mail: Papynov@mail.ru [Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Prospect 100-let Vladivostoku, 159, Vladivostok 690022 (Russian Federation); Far Eastern Federal University, School of Natural Sciences, Suhanova, 8, Vladivostok 690091 (Russian Federation); Mayorov, Vitaliy Yurevich, E-mail: 024205@inbox.ru [Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Prospect 100-let Vladivostoku, 159, Vladivostok 690022 (Russian Federation); Palamarchuk, Marina Sergeevna, E-mail: 02.06.1984@mail.ru [Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Prospect 100-let Vladivostoku, 159, Vladivostok 690022 (Russian Federation); Avramenko, Valentin Aleksandrovich, E-mail: avramenko1@yandex.ru [Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Prospect 100-let Vladivostoku, 159, Vladivostok 690022 (Russian Federation); Far Eastern Federal University, School of Natural Sciences, Suhanova, 8, Vladivostok 690091 (Russian Federation)

2014-02-15T23:59:59.000Z

60

In situ derivation of sulfur activated TiO{sub 2} nano porous layers through pulse-micro arc oxidation technology  

SciTech Connect (OSTI)

Highlights: {yields} S-TiO{sub 2} layers were grown by MAO technique under pulse current for the first time. {yields} Effect of growth parameters on chemical composition, topography, and morphology of the layers was studied. {yields} A correlation between photocatalytic performance and growth conditions was proposed. -- Abstract: Micro arc oxidation technique, as a facile and efficient process, was employed to grow sulfur doped titania porous layers. This research sheds light on the photocatalytic performance of the micro arc oxidized S-TiO{sub 2} nano-porous layers fabricated under pulse current. Morphological and topographical studies, performed by SEM and AFM techniques, revealed that increasing the frequency and/or decreasing the duty cycle resulted in formation of finer pores and smoother surfaces. XRD and XPS results showed that the layers consisted of anatase and rutile phases whose fraction was observed to change depending on the synthesis conditions. The highest anatase relative content was obtained at the frequency of 500 Hz and the duty cycle of 5%. Furthermore, photocatalytic activity of the layers was examined by measuring the decomposition rate of methylene blue under both ultraviolet and visible photo irradiations. Maximum photodegradation reaction rate constants over the pulse-grown S-TiO{sub 2} layers were respectively measured as 0.0202 and 0.0110 min{sup -1} for ultraviolet and visible irradiations.

Bayati, M.R., E-mail: mbayati@ncsu.edu [Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695 (United States); School of Metallurgy and Materials Engineering, Iran University of Science and Technology, P.O. Box 16845-161, Tehran (Iran, Islamic Republic of); Golestani-Fard, F. [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, P.O. Box 16845-161, Tehran (Iran, Islamic Republic of) [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, P.O. Box 16845-161, Tehran (Iran, Islamic Republic of); Center of Excellence for Advanced Materials, Iran University of Science and Technology, P.O. Box 16845-195, Tehran (Iran, Islamic Republic of); Moshfegh, A.Z. [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of) [Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran (Iran, Islamic Republic of); Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 14588-89694, Tehran (Iran, Islamic Republic of); Molaei, Roya [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, P.O. Box 16845-161, Tehran (Iran, Islamic Republic of)] [School of Metallurgy and Materials Engineering, Iran University of Science and Technology, P.O. Box 16845-161, Tehran (Iran, Islamic Republic of)

2011-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

In situ Foaming of Porous (La{sub 0.6}Sr{sub 0.4}){sub 0.98} (Co{sub 0.2} Fe{sub 0.8}) O{sub 3-{delta}} (LSCF) Cathodes for Solid Oxide Fuel Cell Applications  

SciTech Connect (OSTI)

A binder system containing polyurethane precursors was used to in situ foam (direct foam) a (La{sub 0.6}Sr{sub 0.4}){sub 0.98} (Co{sub 0.2} Fe{sub 0.8}) O{sub 3-{#2;delta}} (LSCF) composition for solid oxide fuel cell (SOFC) cathode applications. The relation between in situ foaming parameters on the final microstructure and electrochemical properties was characterized by microscopy and electrochemical impedance spectroscopy (EIS), respectively. The optimal porous cathode architecture was formed with a 70 vol% solids loading within a polymer precursor composition with a volume ratio of 8:4:1 (isocyanate: PEG: surfactant) in a terpineol-based ink vehicle. The resultant microstructure displayed a broad pore size distribution with highly elongated pore structure.

Gandavarapu, Sodith; Sabolsky, Edward; Sabolsky, Katarzyna; Gerdes, Kirk

2013-07-01T23:59:59.000Z

62

Oxidative chemical vapor deposition of semiconducting polymers and their use In organic photovoltaics  

E-Print Network [OSTI]

Organic photovoltaics (OPVs) have received significant interest for their potential low cost, high mechanical flexibility, and unique functionalities. OPVs employing semiconducting polymers in the photoactive layer have ...

Borrelli, David Christopher

2014-01-01T23:59:59.000Z

63

Modelling and characterisation of porous materials.  

E-Print Network [OSTI]

??Porous materials possessing random microstructures exist in both organic (e.g. polymer foam, bone) and in-organic (e.g. silica aerogels) forms. Foams and aerogels are two such… (more)

Alsayednoor, Jafar

2013-01-01T23:59:59.000Z

64

Comparison of the oxidation state of Fe in comet 81P/Wild 2 and chondritic-porous interplanetary dust particles  

SciTech Connect (OSTI)

The fragile structure of chondritic-porous interplanetary dust particles (CP-IDPs) and their minimal parent-body alteration have led researchers to believe these particles originate in comets rather than asteroids where aqueous and thermal alterations have occurred. The solar elemental abundances and atmospheric entry speed of CP-IDPs also suggest a cometary origin. With the return of the Stardust samples from Jupiter-family comet 81P/Wild 2, this hypothesis can be tested. We have measured the Fe oxidation state of 15 CP-IDPs and 194 Stardust fragments using a synchrotron-based x-ray microprobe. We analyzed {approx}300 ng of Wild 2 material - three orders of magnitude more material than other analyses comparing Wild 2 and CP-IDPs. The Fe oxidation state of these two samples of material are > 2{sigma} different: the CP-IDPs are more oxidized than the Wild 2 grains. We conclude that comet Wild 2 contains material that formed at a lower oxygen fugacity than the parent-body, or parent bodies, of CP-IDPs. If all Jupiter-family comets are similar, they do not appear to be consistent with the origin of CP-IDPs. However, comets that formed from a different mix of nebular material and are more oxidized than Wild 2 could be the source of CP-IDPs.

Ogliore, Ryan C.; Butterworth, Anna L.; Fakra, Sirine C.; Gainsforth, Zack; Marcus, Matthew A.; Westphal, Andrew J.

2010-07-16T23:59:59.000Z

65

The Chemical Behavior and Degradation Mitigation Effect of Cerium Oxide Nanoparticles in Perfluorosulfonic Acid Polymer Electrolyte Membranes  

SciTech Connect (OSTI)

Perfluorosulfonic acid membranes, the polymer of choice for polymer electrolyte hydrogen fuel cells, are susceptible to degradation due to attacks on polymer chains from radicals. Mitigation of this attack by cerium-based radical scavengers is an approach that has shown promise. In this work, two formulations of single-crystal cerium oxide nanoparticles, with an order of magnitude difference in particle size, are incorporated into said membranes and subjected to proton conductivity measurements and ex-situ durability tests. We found that ceria is reduced to Ce(III) ions in the acidic environment of a heated, humidified membrane which negatively impacts proton conductivity. In liquid and gas Fenton testing, fluoride emission is reduced by an order of magnitude, drastically increasing membrane longevity. Side-product analysis demonstrated that in the liquid Fenton test, the main point of attack are weak polymer end groups, while in the gas Fenton test, there is additional side-chain attack. Both mechanisms are mitigated by the addition of the ceria nanoparticles, whereby the extent of the durability improvement is found to be independent of particle size.

Pearman, Benjamin P [ORNL; Mohajeri, Nahid [ORNL; Slattery, Darlene [Florida Solar Energy Center (FSEC); Hampton, Michael [University of Florida; Seal, Sudipta [University of Central Florida; Cullen, David A [ORNL

2013-01-01T23:59:59.000Z

66

Light-extraction enhancement in GaN-based light-emitting diodes using grade-refractive-index amorphous titanium oxide films with porous structures  

SciTech Connect (OSTI)

Amorphous titanium oxide (a-TiO{sub x}:OH) films prepared by plasma-enhanced chemical-vapor deposition at 200 and 25 deg. C are in turn deposited onto the GaN-based light-emitting diode (LED) to enhance the associated light extraction efficiency. The refractive index, porosity, and photocatalytic effect of the deposited films are correlated strongly with the deposition temperatures. The efficiency is enhanced by a factor of {approx}1.31 over that of the uncoated LEDs and exhibited an excellent photocatalytic property after an external UV light irradiation. The increase in the light extraction is related to the reduction in the Fresnel transmission loss and the enhancement of the light scattering into the escape cone by using the graded-refractive-index a-TiO{sub x}:OH film with porous structures.

Liu, D.-S.; Lin, T.-W.; Huang, B.-W.; Juang, F.-S.; Lei, P.-H. [Institute of Electro-Optical and Materials Science, National Formosa University, Huwei 63201, Taiwan (China); Hu, C.-Z. [Chilin Technology Co. Ltd., Tainan County 71758, Taiwan (China)

2009-04-06T23:59:59.000Z

67

Industry Symposium on Micro and Nano scale Cellular Polymers Department of Mechanical Engineering  

E-Print Network [OSTI]

.00 Gas-Assisted Thermoforming of Recycled PET Stephen Probert and Krishna Nadella 11.30 Porous Polymers

Kumar, Vipin

68

Light Induced Water Oxidation on Cobalt-Phosphate (Co-Pi) Catalyst Modified Semi-Transparent, Porous SiO2-BiVO4 Electrodes  

SciTech Connect (OSTI)

A facile and simple procedure for the synthesis of semi-transparent and porous SiO{sub 2}-BiVO{sub 4} electrodes is reported. The method involves a surfactant assisted metal-organic decomposition at 500 C. An earth abundant oxygen evolution catalyst (OEC), cobalt phosphate (Co-Pi), has been used to modify the SiO{sub 2}-BiVO{sub 4} electrode by electrodeposition (ED) and photoassisted electrodeposition (PED) methods. Modified electrodes by these two methods have been examined for light induced water oxidation and compared to the unmodified SiO{sub 2}-BiVO{sub 4} electrodes by various photoelectrochemical techniques. The PED method was a more effective method of OEC preparation than the ED method as evidenced by an increased photocurrent magnitude during photocurrent-potential (I-V) characterizations. Electrode surfaces catalyzed by PED exhibited a very large cathodic shift (420 mV) in the onset potential for water oxidation. The chopped-light I-V measurements performed at different intervals over 24-hour extended testing under illumination and applied bias conditions show a fair photostability for PED Co-Pi modified SiO{sub 2}-BiVO{sub 4}.

Pilli, S. K.; Deutsch, T. G.; Furtak, T. E.; Turner, J. A.; Brown, L. D.; Herring, A. M.

2012-04-21T23:59:59.000Z

69

Sputtered Nickel Oxide Thin Film for Efficient Hole Transport Layer in Polymer-Fullerene Bulk-Heterojunction Organic Solar Cell  

SciTech Connect (OSTI)

Bulk-heterojunction (BHJ) organic photovoltaics (OPV) are very promising thin film renewable energy conversion technologies due to low production cost by high-throughput roll-to-roll manufacturing, an expansive list of compatible materials, and flexible device fabrication. An important aspect of OPV device efficiency is good contact engineering. The use of oxide thin films for this application offers increased design flexibility and improved chemical stability. Here we present our investigation of radio frequency magnetron sputtered nickel oxide (NiO{sub x}) deposited from oxide targets as an efficient, easily scalable hole transport layer (HTL) with variable work-function, ranging from 4.8 to 5.8 eV. Differences in HTL work-function were not found to result in statistically significant changes in open circuit voltage (V{sub oc}) for poly(3-hexylthiophene):[6,6]-phenyl-C{sub 61}-butyric acid methyl ester (P3HT:PCBM) BHJ device. Ultraviolet photoemission spectroscopy (UPS) characterization of the NiO{sub x} film and its interface with the polymer shows Fermi level alignment of the polymer with the NiO{sub x} film. UPS of the blend also demonstrates Fermi level alignment of the organic active layer with the HTL, consistent with the lack of correlation between V{sub oc} and HTL work-function. Instead, trends in j{sub sc}, V{sub oc}, and thus overall device performance are related to the surface treatment of the HTL prior to active layer deposition through changes in active layer thickness.

Widjonarko, N. E.; Ratcliff, E. L.; Perkins, C. L.; Sigdel, A. K.; Zakutayev, A.; Ndione, P. F.; Gillaspie, D. T.; Ginley, D. S.; Olson, D. C.; Berry, J. J.

2012-03-01T23:59:59.000Z

70

Laser-induced dehydration of graphite oxide coatings on polymer substrates  

SciTech Connect (OSTI)

Nanosized graphite has been oxidized by the Hummers method to give high quality graphite oxide. This reaction is characterized by a very fast kinetic behavior and a high yield. The produced graphite oxide has been conveniently used to pattern graphene by using a standard photolithographic method, and the resulting systems have been characterized by optical microscopy (OM), scanning electron microscopy (SEM) and by Fourier transform infrared spectroscopy (FT-IR) and Visible-Near Infrared spectroscopy (Vis-NIR)

Longo, Angela, E-mail: angela.longo@cnr.it; Palomba, Mariano; Carotenuto, Gianfranco; Nicolais, Luigi [Institute for Composite and Biomedical Materials, National Research Council, Viale Kennedy, 54, Mostra d'Oltremare Padiglione 20, 80125 Napoli (Italy); Orabona, Emanuele; Maddalena, Pasqualino [Department of Physics, University of Naples, Federico II, via cintia, 80126, Naples, Italy and SPIN Institute, National Research Council, UOS Naples, via cintia, 80126, Naples (Italy); Ambrosio, Antonio [SPIN Institute, National Research Council, UOS Naples, via cintia, 80126, Naples (Italy)

2014-05-15T23:59:59.000Z

71

Phenomenological study of Au and Pt nanowires grown in porous alumina scaffolds  

E-Print Network [OSTI]

Porous anodic aluminum oxide, commonly known as AAO, has been widely used as a scaffold to synthesize nanowires and nanotubes. The porous alumina structure can be obtained from a simple electrochemical oxidation process, ...

Shin, Yong Cheol, S.M. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

72

E-Print Network 3.0 - aluminum oxide doping Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Porous Aluminum Oxide Film Formed on an Electrically Insulating... Carolina 29208, USA Thin films of porous anodic aluminum oxide have been prepared on an electrically......

73

Strength and Notch Sensitivity of Porous-Matrix Oxide Composites Michael A. Mattoni and Frank W. Zokw  

E-Print Network [OSTI]

of a model that accounts for interac- tions between notch tip tensile and shear bands. The model pre with alumina. I. Introduction FIBER-REINFORCED oxide composites are being targeted for use in future gas turbine engines. Their obvious advantage over monolithic ceramics is their superior damage tolerance

Zok, Frank

74

Process to produce lithium-polymer batteries  

DOE Patents [OSTI]

A polymer bonded sheet product is described suitable for use as an electrode in a non-aqueous battery system. A porous electrode sheet is impregnated with a solid polymer electrolyte, so as to diffuse into the pores of the electrode. The composite is allowed to cool, and the electrolyte is entrapped in the porous electrode. The sheet products composed have the solid polymer electrolyte composition diffused into the active electrode material by melt-application of the solid polymer electrolyte composition into the porous electrode material sheet. The solid polymer electrolyte is maintained at a temperature that allows for rapid diffusion into the pores of the electrode. The composite electrolyte-electrode sheets are formed on current collectors and can be coated with solid polymer electrolyte prior to battery assembly. The interface between the solid polymer electrolyte composite electrodes and the solid polymer electrolyte coating has low resistance. 1 fig.

MacFadden, K.O.

1998-06-30T23:59:59.000Z

75

Process to produce lithium-polymer batteries  

DOE Patents [OSTI]

A polymer bonded sheet product suitable for use as an electrode in a non-aqueous battery system. A porous electrode sheet is impregnated with a solid polymer electrolyte, so as to diffuse into the pores of the electrode. The composite is allowed to cool, and the electrolyte is entrapped in the porous electrode. The sheet products composed have the solid polymer electrolyte composition diffused into the active electrode material by melt-application of the solid polymer electrolyte composition into the porous electrode material sheet. The solid polymer electrolyte is maintained at a temperature that allows for rapid diffusion into the pores of the electrode. The composite electrolyte-electrode sheets are formed on current collectors and can be coated with solid polymer electrolyte prior to battery assembly. The interface between the solid polymer electrolyte composite electrodes and the solid polymer electrolyte coating has low resistance.

MacFadden, Kenneth Orville (Highland, MD)

1998-01-01T23:59:59.000Z

76

Method for production of ceramic oxide and carbide bodies by polymer inclusion and decomposition  

DOE Patents [OSTI]

A method for the preparation of thin, free-standing metal oxide films which are useful as nuclear accelerator target materials is described. Cations of any metal except those of Group IA and precious metals, such as, U, Zr, Nd, Ce, Th, Pr or Cr, are absorbed on a thin film of polymeric material, such as carboxymethylcellulose, viscose rayon or cellophane. The cation impregnated polymeric material is dried. Then the impregnated film is heated in an inert atmosphere to form a carbonized membrane. The carbonized membrane is oxidized to yield a thin, self-supporting, metal oxide membrane. Or, the membrane can be heated in an inert atmosphere to yield a thin, self-supporting, metal carbide-containing membrane.

Quinby, T.C.

1984-08-30T23:59:59.000Z

77

Method for production of ceramic oxide and carbide bodies by polymer inclusion and decomposition  

DOE Patents [OSTI]

A method for the preparation of thin, free-standing metal oxide films which are useful as nuclear accelerator target materials. Cations of any metal except those of Group IA and precious metals, such as, U, Zr, Nd, Ce, Th, pr or Cr, are absorbed on a thin film of polymeric material, such as, carboxymethylcellulose, viscose rayon or cellophane. The cation impregnated polymeric material is dried. Then the impregnated film is heated in an inert atmosphere to form a carbonized membrane. The carbonized membrane is oxidized to yield a thin, self-supporting, metal oxide membrane. Or, the membrane can be heated in an inert atmosphere to yield a thin, self-supporting, metal carbide-containing membrane.

Quinby, Thomas C. (Kingston, TN)

1985-01-01T23:59:59.000Z

78

Porous ceramics and method for making  

SciTech Connect (OSTI)

The fabrication of a porous ceramic composite is described. Fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, R.H.; Holcombe, C.E.

1989-06-08T23:59:59.000Z

79

Method of making porous ceramic fluoride  

SciTech Connect (OSTI)

A process is disclosed for making a porous ceramic composite where fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, R.H.; Holcombe, C.E.

1990-11-13T23:59:59.000Z

80

Method of making porous ceramic fluoride  

DOE Patents [OSTI]

A process for making a porous ceramic composite where fumed silica particles are coated with a nitrate, preferably aluminum nitrate. Next the nitrate is converted to an oxide and formed into a desired configuration. This configuration is heated to convert the oxide to an oxide silicate which is then react with HF, resulting in the fluoride ceramic, preferably aluminum fluoride.

Reiner, Robert H. (Knoxville, TN); Holcombe, Cressie E. (Farragut, TN)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Development of hybrid organic-inorganic light emitting diodes using conducting polymers deposited by oxidative chemical vapor deposition process  

E-Print Network [OSTI]

Difficulties with traditional methods of synthesis and film formation for conducting polymers, many of which are insoluble, motivate the development of CVD methods. Indeed, conjugated polymers with rigid linear backbones ...

Chelawat, Hitesh

2010-01-01T23:59:59.000Z

82

Fundamental studies of fluid mechanics and stability in porous media  

SciTech Connect (OSTI)

This report summarizes accomplished and proposed work for the fundamental studies of fluid mechanics and stability in porous media. Topics discussed include: viscous fingering in miscible displacements; polymer flow interactions in free shear layers of viscoelastic fluids; effect of nonmonotonic viscosity profiles on the stability of miscible displacements in porous media; and references. (JL)

Homsy, G.M.

1991-08-01T23:59:59.000Z

83

Solid State Nuclear Magnetic Resonance Investigation of Polymer Backbone Dynamics in Poly(Ethylene Oxide) Based Lithium and Sodium Polyether-ester-sulfonate Ionomers  

SciTech Connect (OSTI)

Polymer backbone dynamics of single ion conducting poly(ethylene oxide) (PEO)-based ionomer samples with low glass transition temperatures (Tg) have been investigated using solid-state nuclear magnetic resonance (NMR). Experiments detecting 13C with 1H decoupling under magic angle spinning (MAS) conditions identified the different components of the polymer backbone (PEO spacer and isophthalate groups) and their relative mobilities for a suite of lithium- and sodium-containing ionomer samples with varying cation contents. Variable temperature (203-373 K) 1H-13C cross-polarization MAS (CP-MAS) experiments also provided qualitative assessment of the differences in the motions of the polymer backbone components as a function of cation content and identity. Each of the main backbone components exhibit distinct motions, following the trends expected for motional characteristics based on earlier Quasi Elastic Neutron Scattering and 1H spin-lattice relaxation rate measurements. Previous 1H and 7Li spin-lattice relaxation measurements focused on both the polymer backbone and cation motion on the nanosecond timescale. The studies presented here assess the slower timescale motion of the polymer backbone allowing for a more comprehensive understanding of the polymer dynamics. The temperature dependences of 13C linewidths were used to both qualitatively and quantitatively examine the effects of cation content and identity on PEO spacer mobility. Variable contact time 1H-13C CP-MAS experiments were used to further assess the motions of the polymer backbone on the microsecond timescale. The motion of the PEO spacer, reported via the rate of magnetization transfer from 1H to 13C nuclei, becomes similar for T ? 1.1 Tg in all ionic samples, indicating that at similar elevated reduced temperatures the motions of the polymer backbones on the microsecond timescale become insensitive to ion interactions. These results present an improved picture, beyond those of previous findings, for the dependence of backbone dynamics on cation density (and here, cation identity as well) in these amorphous PEO-based ionomer systems.

Roach, David J. [Penn State Univ., State College, PA (United States). Dept. of Chemistry; Dou, Shichen [Penn State Univ., State College, PA (United States). Dept. of Materials Science and Engineering; Colby, Ralph H. [Penn State Univ., State College, PA (United States). Dept. of Materials Science and Engineering; Mueller, Karl T. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Penn State Univ., State College, PA (United States). Dept. of Chemistry

2013-05-21T23:59:59.000Z

84

Nanostructured transition metal oxides useful for water oxidation catalysis  

DOE Patents [OSTI]

The present invention provides for a composition comprising a nanostructured transition metal oxide capable of oxidizing two H.sub.2O molecules to obtain four protons. In some embodiments of the invention, the composition further comprises a porous matrix wherein the nanocluster of the transition metal oxide is embedded on and/or in the porous matrix.

Frei, Heinz M; Jiao, Feng

2013-12-24T23:59:59.000Z

85

New Porous Lanthanide-Organic Frameworks: Synthesis, Characterization, and Properties of Lanthanide 2,6-Naphthalenedicarboxylates  

E-Print Network [OSTI]

to avoid the interpenetration of networks. Thus far, porous coordination polymers have centered. However, the main problem encountered in designing such coordination polymers is the interpenetration. The interpenetration of frameworks can fre- quently be seen in lanthanide coordination polymers be- cause many

Gao, Song

86

Polymer blends for use in photoelectrochemical cells for conversion of solar energy to electricity  

DOE Patents [OSTI]

There is disclosed a polymer blend of a highly conductive polymer and a solid polymer electrolyte that is designed to achieve better charge transfer across the conductive film/polymer electrolyte interface of the electrochemical photovoltaic cell. The highly conductive polymer is preferably polypyrrole or poly-N-p-nitrophenylpyrrole and the solid polymer electrolyte is preferably polyethylene oxide or polypropylene oxide.

Skotheim, T.

1984-09-28T23:59:59.000Z

87

Polymer blends for use in photoelectrochemical cells for conversion of solar energy to electricity  

DOE Patents [OSTI]

There is disclosed a polymer blend of a highly conductive polymer and a solid polymer electrolyte that is designed to achieve better charge transfer across the conductive film/polymer electrolyte interface of the electrochemical photovoltaic cell. The highly conductive polymer is preferably polypyrrole or poly-N-p-nitrophenylpyrrole and the solid polymer electrolyte is preferably polyethylene oxide or polypropylene oxide.

Skotheim, Terje (East Patchogue, NY)

1986-01-01T23:59:59.000Z

88

INVESTIGATION AND MODELING OF DAMPING IN A PLATE WITH A BONDED POROUS LAYER  

E-Print Network [OSTI]

-00438860,version1-31Dec2009 #12;1. INTRODUCTION Porous materials like polymer foam and glass wool. It can be the major phenomenon within soft materials, but for most foams viscoelastic dissipation

Paris-Sud XI, Université de

89

Solid polymer electrolyte compositions  

DOE Patents [OSTI]

An electrolyte composition is featured that includes a solid, ionically conductive polymer, organically modified oxide particles that include organic groups covalently bonded to the oxide particles, and an alkali metal salt. The electrolyte composition is free of lithiated zeolite. The invention also features cells that incorporate the electrolyte composition.

Garbe, James E. (Stillwater, MN); Atanasoski, Radoslav (Edina, MN); Hamrock, Steven J. (St. Paul, MN); Le, Dinh Ba (St. Paul, MN)

2001-01-01T23:59:59.000Z

90

Durable metallized polymer mirror  

DOE Patents [OSTI]

A metallized polymer mirror construction having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate.

Schissel, Paul O. (Golden, CO); Kennedy, Cheryl E. (Lafayette, CO); Jorgensen, Gary J. (Pine, CO); Shinton, Yvonne D. (Northglenn, CO); Goggin, Rita M. (Englewood, CO)

1994-01-01T23:59:59.000Z

91

Durable metallized polymer mirror  

DOE Patents [OSTI]

A metallized polymer mirror construction is disclosed having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate. 6 figs.

Schissel, P.O.; Kennedy, C.E.; Jorgensen, G.J.; Shinton, Y.D.; Goggin, R.M.

1994-11-01T23:59:59.000Z

92

Fundamental studies of fluid mechanics and stability in porous media. Progress report  

SciTech Connect (OSTI)

This report summarizes accomplished and proposed work for the fundamental studies of fluid mechanics and stability in porous media. Topics discussed include: viscous fingering in miscible displacements; polymer flow interactions in free shear layers of viscoelastic fluids; effect of nonmonotonic viscosity profiles on the stability of miscible displacements in porous media; and references. (JL)

Homsy, G.M.

1991-08-01T23:59:59.000Z

93

Separation of gas mixtures using Co(II) carborane-based porous coordination polymersw  

E-Print Network [OSTI]

to their inherent robustness, which results in porous materials with thermal stability and resistance towards with coordinated pyridine. Unusual selectivity for O2 over N2 (as high as 6.5) was demonstrated in the materials of materials.3 An attractive feature of porous coordination polymers lies in the rational and highly versatile

94

4/28/2010 1Porous Pavements Porous Pavements  

E-Print Network [OSTI]

-- Sturdy, attractive & reliable · Porous concrete -- Quality depends on installer · Porous asphalt Park parking lot (2008) ·! Shoreview Porous Concrete Street project (2009) ·! Troy Burne Golf Course4/28/2010 1Porous Pavements Porous Pavements for Stormwater Restoration in Urban Environments Cliff

Minnesota, University of

95

Polymer blends for use in photoelectrochemical cells for conversion of solar energy to electricity and methods for manufacturing such blends  

DOE Patents [OSTI]

There is disclosed a polymer blend of a highly conductive polymer and a solid polymer electrolyte that is designed to achieve better charge transfer across the conductive film/polymer electrolyte interface of the electrochemical photovoltaic cell. The highly conductive polymer is preferably polypyrrole or poly-N-p-nitrophenylpyrrole and the solid polymer electrolyte is preferably polyethylene oxide or polypropylene oxide.

Skotheim, Terje (East Patchogue, NY)

1984-01-01T23:59:59.000Z

96

Performance of Titanium-Oxide/Polymer Insulation in Bi-2212/Ag-alloy Round Wire Wound Superconducting Coils  

E-Print Network [OSTI]

Conductor insulation is one of the key components needed to make Ag-alloy clad Bi2Sr2CaCu2O8+x (Bi-2212/Ag) superconducting round wire (RW) successful for high field magnet applications as dielectric standoff and high winding current densities (Jw) directly depend on it. In this study, a TiO2/polymer insulation coating developed by nGimat LLC was applied to test samples and a high field test coil. The insulation was investigated by differential thermal analysis (DTA), thermo-gravimetric analysis (TGA), scanning electron microscopy (SEM), dielectric properties measurement, and transport critical current (Ic) properties measurement. About 29% of the insulation by weight is polymer. When the Bi-2212/Ag wire is full heat treated, this decomposes with slow heating to 400{\\deg}C in pure O2. After the full reaction, we found that the TiO2 did not degrade the critical current properties, adhered well to the conductor, and provided a breakdown voltage of >100 V, which allowed the test coil to survive quenching in 31.2 T background field, while providing a 2.6 T field increment. For Bi-2212/Ag RW with a typical diameter of 1.0-1.5 mm, this ~15 um thick insulation allows a very high coil packing factor of ~0.74, whereas earlier alumino-silicate braid insulation only allows packing factors of 0.38-0.48.

Peng Chen; Ulf P Trociewitz; Matthieu Dalban-Canassy; Jianyi Jiang; Eric E Hellstrom; David C Larbalestier

2013-03-20T23:59:59.000Z

97

High-strength porous carbon and its multifunctional applications  

DOE Patents [OSTI]

High-strength porous carbon and a method of its manufacture are described for multifunctional applications, such as ballistic protection, structural components, ultracapacitor electrodes, gas storage, and radiation shielding. The carbon is produced from a polymer precursor via carbonization, and optionally by surface activation and post-treatment.

Wojtowicz, Marek A; Rubenstein, Eric P; Serio, Michael A; Cosgrove, Joseph E

2013-12-31T23:59:59.000Z

98

Method to fabricate high performance tubular solid oxide fuel cells  

DOE Patents [OSTI]

In accordance with the present disclosure, a method for fabricating a solid oxide fuel cell is described. The method includes forming an asymmetric porous ceramic tube by using a phase inversion process. The method further includes forming an asymmetric porous ceramic layer on a surface of the asymmetric porous ceramic tube by using a phase inversion process. The tube is co-sintered to form a structure having a first porous layer, a second porous layer, and a dense layer positioned therebetween.

Chen, Fanglin; Yang, Chenghao; Jin, Chao

2013-06-18T23:59:59.000Z

99

Ventilation of porous media  

DOE Patents [OSTI]

Methods are presented for distributing gases throughout the interstices of porous materials and removing volatile substances from the interstices of porous materials. Continuous oscillation of pressures and flows results in increased penetration of the interstices by flowing gases and increased transport of gaseous components out of the interstices. The invention is particularly useful in soil vapor extraction. 10 figures.

Neeper, D.A.

1994-02-22T23:59:59.000Z

100

Microporous Patterned Electrodes for Color-Matched Electrochromic Polymer Displays  

E-Print Network [OSTI]

Microporous Patterned Electrodes for Color-Matched Electrochromic Polymer Displays Pierre of electroactive and conducting polymers offers new opportunities for the design of materials for electrochromic the most promising electrochromic (EC) properties. Here, we report the use of highly porous metallized

Tanner, David B.

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Efficient Polymer Solar Cells Fabricated on Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate)-Etched Old Indium Tin Oxide Substrates  

SciTech Connect (OSTI)

In organic electronic devices, indium tin oxide (ITO) and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) are the most common transparent electrode and anodic buffer layer materials, respectively. A widespread concern is that PEDOT:PSS is acidic and etches ITO. We show that this issue is not serious: only a few nanometers of ITO are etched in typical device processing conditions and storage thereafter; conductivity losses are affordable; and optical transmission gains further offset these losses. Organic photovoltaic (OPV) devices fabricated on old ITO (with PEDOT:PSS history) were similar or higher in efficiency than devices on fresh ITO. Poly[[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b?]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl

Elshobaki, Moneim [Mansoura University; Anderegg, James [Ames Laboratory; Chaudhary, Sumit [Ames Laboratory

2014-08-13T23:59:59.000Z

102

Preparation of asymmetric porous materials  

DOE Patents [OSTI]

A method for preparing an asymmetric porous material by depositing a porous material film on a flexible substrate, and applying an anisotropic stress to the porous media on the flexible substrate, where the anisotropic stress results from a stress such as an applied mechanical force, a thermal gradient, and an applied voltage, to form an asymmetric porous material.

Coker, Eric N. (Albuquerque, NM)

2012-08-07T23:59:59.000Z

103

Fabrication of porous silicon membranes  

E-Print Network [OSTI]

OF THE FILTER APPLICATION OF POROUS SILICON A. Density of Porous Silicon B. Stabilization of Porous Silicon Membranes C. Flow Test D. Porous Polycrystalline Silicon 54 58 62 65 vn TABLE OF CONTENTS (Continued) CHAPTER VI EXTENSIONS AND CONCLUSIONS... Membranes 13. Density Change of Porous Silicon at 125'C 14. Density Change oi' Porous Silicon at 250 C 15. Nitrogen Flow on a Porous Silicon Membrane Page 15 16 33 39 39 44 46 54 59 59 62 LIST OF FIGURES Figure 10. 12. 14. 17. 18. 19...

Yue, Wing Kong

1988-01-01T23:59:59.000Z

104

Effects of Thermal Aging on the Mechanical Properties of a Porous-Matrix Ceramic Composite  

E-Print Network [OSTI]

Effects of Thermal Aging on the Mechanical Properties of a Porous-Matrix Ceramic Composite Eric A properties of an all-oxide fiber-reinforced composite following long-term exposure (1000 h) at temperatures of 1000­1200°C in air. The composite of interest derives its damage tolerance from a highly porous matrix

Zok, Frank

105

Method for forming porous sintered bodies with controlled pore structure  

DOE Patents [OSTI]

The present invention is based, in part, on a method for combining a mixture of hydroxide and hydride functional siloxanes to form a polysiloxane polymer foam, that leaves no residue (zero char yield) upon thermal decomposition, with ceramic and/or metal powders and appropriate catalysts to produce porous foam structures having compositions, densities, porosities and structures not previously attainable. The siloxanes are mixed with the ceramic and/or metal powder, wherein the powder has a particle size of about 400 .mu.m or less, a catalyst is added causing the siloxanes to foam and crosslink, thereby forming a polysiloxane polymer foam having the metal or ceramic powder dispersed therein. The polymer foam is heated to thermally decompose the polymer foam and sinter the powder particles together. Because the system is completely nonaqueous, this method further provides for incorporating reactive metals such as magnesium and aluminum, which can be further processed, into the foam structure.

Whinnery, LeRoy Louis (4929 Julie St., Livermore, Alameda County, CA 94550); Nichols, Monte Carl (4070 Guilford Ave., Livermore, Alameda County, CA 94550)

2000-01-01T23:59:59.000Z

106

Preparation of redox polymer cathodes for thin film rechargeable batteries  

DOE Patents [OSTI]

The present invention relates to the manufacture of thin film solid state electrochemical devices using composite cathodes comprising a redox polymer capable of undergoing oxidation and reduction, a polymer solid electrolyte and conducting carbon. The polymeric cathode material is formed as a composite of radiation crosslinked polymer electrolytes and radiation crosslinked redox polymers based on polysiloxane backbones with attached organosulfur side groups capable of forming sulfur-sulfur bonds during electrochemical oxidation.

Skotheim, T.A.; Lee, H.S.; Okamoto, Yoshiyuki.

1994-11-08T23:59:59.000Z

107

Surface engineering using layer-by-layer assembly of pH-sensitive polymers and nanoparticles  

E-Print Network [OSTI]

Surface engineering of a variety of materials including colloidal particles and porous membranes has been achieved by using layer-by-layer assembly of pH-sensitive polymers and nanoparticles. In the first part of this ...

Lee, Daeyeon

2007-01-01T23:59:59.000Z

108

Porous material neutron detector  

DOE Patents [OSTI]

A neutron detector employs a porous material layer including pores between nanoparticles. The composition of the nanoparticles is selected to cause emission of electrons upon detection of a neutron. The nanoparticles have a maximum dimension that is in the range from 0.1 micron to 1 millimeter, and can be sintered with pores thereamongst. A passing radiation generates electrons at one or more nanoparticles, some of which are scattered into a pore and directed toward a direction opposite to the applied electrical field. These electrons travel through the pore and collide with additional nanoparticles, which generate more electrons. The electrons are amplified in a cascade reaction that occurs along the pores behind the initial detection point. An electron amplification device may be placed behind the porous material layer to further amplify the electrons exiting the porous material layer.

Diawara, Yacouba (Oak Ridge, TN); Kocsis, Menyhert (Venon, FR)

2012-04-10T23:59:59.000Z

109

Foams in porous media  

SciTech Connect (OSTI)

In 1978 a literature search on selective blocking of fluid flow in porous media was done by Professor S.S. Marsden and two of his graduate students, Tom Elson and Kern Huppy. This was presented as SUPRI Report No. TR-3 entitled ''Literature Preview of the Selected Blockage of Fluids in Thermal Recovery Projects.'' Since then a lot of research on foam in porous media has been done on the SUPRI project and a great deal of new information has appeared in the literature. Therefore we believed that a new, up-to-date search should be done on foam alone, one which would be helpful to our students and perhaps of interest to others. This is a chronological survey showing the development of foam flow, blockage and use in porous media, starting with laboratory studies and eventually getting into field tests and demonstrations. It is arbitrarily divided into five-year time periods. 81 refs.

Marsden, S.S.

1986-07-01T23:59:59.000Z

110

e-Polymers 2009, no. 134 http://www.e-polymers.org  

E-Print Network [OSTI]

so produced are both flexible and porous; we now report their swelling efficacies as a function have been used to absorb oil spilled on water [1, 2]. Polypropylene (PP), polyethylene (PE in remediation of oil spills [3]. Among such materials, alkyl acrylate and aromatic polymers with hydrophobicity

North Texas, University of

111

Effect of Spin-Crossover-Induced Pore Contraction on CO{sub 2}-Host Interactions in the Porous Coordination Polymers [Fe(pyrazine)M(CN){sub 4}] (M = Ni, Pt)  

SciTech Connect (OSTI)

Variable-temperature in situ ATR-FTIR spectra are presented for the porous spin-crossover compounds [Fe(pyrazine)- Ni(CN){sub 4}] and [Fe(pyrazine)Pt(CN){sub 4}] under CO{sub 2} pressures of up to 8 bar. Significant shifts in the ?{sub 3} and ?{sub 2} IR absorption bands of adsorbed CO{sub 2} are observed as the host materials undergo transition between low- and high-spin states. Computational models used to determine the packing arrangement of CO{sub 2} within the pore structures show a preferred orientation of one of the adsorbed CO{sub 2} molecules with close O=C=O···H contacts with the pyrazine pillar ligands. The interaction is a consequence of the commensurate distance of the inter-pyrazine separations and the length of the CO{sub 2} molecule, which allows the adsorbed CO{sub 2} to effectively bridge the pyrazine pillars in the structure. The models were used to assign the distinct shifts in the IR absorption bands of the adsorbed CO{sub 2} that arise from changes in the O=C=O···H contacts that strengthen and weaken in correlation with changes in the Fe–N bond lengths as the spin state of Fe changes. The results indicate that spin-crossover compounds can function as a unique type of flexible sorbent in which the pore contractions associated with spin transition can affect the strength of CO{sub 2}–host interactions.

Culp, Jeffrey T.; Chen, De-Li; Liu, Jinchen; Chirdon, Danielle; Kauffman, Kristi; Goodman, Angela; Johnson, J. Karl

2013-02-01T23:59:59.000Z

112

Formation of multiple levels of porous silicon for buried insulators and conductors in silicon device technologies  

DOE Patents [OSTI]

A method of forming a multiple level porous silicon substrate for semiconductor integrated circuits including anodizing non-porous silicon layers of a multi-layer silicon substrate to form multiple levels of porous silicon. At least one porous silicon layer is then oxidized to form an insulating layer and at least one other layer of porous silicon beneath the insulating layer is metallized to form a buried conductive layer. Preferably the insulating layer and conductive layer are separated by an anodization barrier formed of non-porous silicon. By etching through the anodization barrier and subsequently forming a metallized conductive layer, a fully or partially insulated buried conductor may be fabricated under single crystal silicon.

Blewer, Robert S. (Albuquerque, NM); Gullinger, Terry R. (Albuquerque, NM); Kelly, Michael J. (Albuquerque, NM); Tsao, Sylvia S. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

113

PH/sub 3/ treatment for polymer stabilization  

DOE Patents [OSTI]

Polymers are stabilized against oxidative degradation by treatment with phosphine gas. The treatment can be used in situ on polymeric components already in use.

Not Available

1982-07-20T23:59:59.000Z

114

Pyrolytic carbon electrodes Lithographically Defined Porous Carbon Electrodes**  

E-Print Network [OSTI]

to the intrinsic material properties of carbon, functionalized films can be produced through chemical modification fabrication method capable of producing large area (%100 s cm2 ) submicrometer porous carbon films. In our methodology. The palladium-modified electrodes exhibit a catalytic response for methanol oxidation

New Mexico, University of

115

Accelerated Characterization of Polymer Properties  

SciTech Connect (OSTI)

This report describes the efforts to develop a suite of microanalysis techniques that can rapidly measure a variety of polymer properties of industrial importance, including thermal, photo-oxidative, and color stability; as well as ductility, viscosity, and mechanical and antistatic properties. Additional goals of the project were to direct the development of these techniques toward simultaneous measurements of multiple polymer samples of small size in real time using non-destructive and/or parallel or rapid sequential measurements, to develop microcompounding techniques for preparing polymers with additives, and to demonstrate that samples prepared in the microcompounder could be analyzed directly or used in rapid off-line measurements. These enabling technologies are the crucial precursors to the development of high-throughput screening (HTS) methodologies for the polymer additives industry whereby the rate of development of new additives and polymer formulations can be greatly accelerated.

R. Wroczynski; l. Brewer; D. Buckley; M. Burrell; R. Potyrailo

2003-07-30T23:59:59.000Z

116

The influence of self-assembly behavior of nanoparticles on the dielectric polymer composites  

SciTech Connect (OSTI)

To clearify the influence of the distribution of the conductive nanoparticles on the dielectric properties of the corresponding polymer composites, the microstructure and dielectric character of the composites based on the oleic acid modified ferroferric oxide and polyvinylidene fluoride (PVDF) polymer have been studied experimentally. It is found that these composites exhibit a normal percolative phase transition over the filler content from insulator to conductor, consistent with the classical percolation theory. However, when the percentage of fillers is at a certain value which is below the percolation threshold, these nanoparticles can assemble into a special porous structure in the PVDF matrix, associated with the enhancement of dielectric constant at low frequency. In addition, the controllable dispersion of conducting nanoparticles in a polymer matrix can prevent premature agglomeration at low filling fractions and avoid the appearance of anomalously early percolation. Therefore, the self-assembly behavior of nanoparticles can be beneficial to preparation of the high dielectric constant and low loss composites for the application of electric energy storage.

Lu, Xin; Li, Weiping, E-mail: liweiping@nbu.edu.cn; Wang, Tingting; Jiang, Long; Luo, Laihui; Hua, Dayin; Zhu, Yuejin [Department of Microelectronic Science and Engineering, Facuty of Science, Ningbo University, Ningbo, 315211 (China)] [Department of Microelectronic Science and Engineering, Facuty of Science, Ningbo University, Ningbo, 315211 (China)

2013-11-15T23:59:59.000Z

117

Electrospun a-Si using Liquid Silane/Polymer Inks  

SciTech Connect (OSTI)

Amorphous silicon nanowires (a-SiNWs) were prepared by electrospinning cyclohexasilane (Si{sub 6}H{sub 12}) admixed with polymethylmethacrylate (PMMA) in toluene. Raman spectroscopy characterization of these wires (d {approx} 50-2000 nm) shows 350 C treatment yields a-SiNWs. Porous a-SiNWs are obtained using a volatile polymer.

Doug Schulz

2010-12-09T23:59:59.000Z

118

Semipermeable polymers and method for producing the same  

DOE Patents [OSTI]

A polyamide membrane including reaction product of an anhydrous solution comprising an anhydrous solvent, at least one polyfunctional secondary amine and a pre-polymer deposition catalyst, and an anhydrous, organic solvent solution comprising a polyfunctional aromatic amine-reactive reactant having one ring. A composite semipermeable membrane including the polyamide membrane on a porous support.

Buschmann, Wayne E

2014-04-01T23:59:59.000Z

119

Dielectric Actuation of Polymers  

E-Print Network [OSTI]

S. Stanford, Interpenetrating polymer networks for high-based on interpenetrating polymer networks, Proceeding ofX. Niu, Q. Pei, Interpenetrating polymer networks based on

Niu, Xiaofan

2013-01-01T23:59:59.000Z

120

Enhancement of thermal stability of porous bodies comprised of stainless steel or an alloy  

DOE Patents [OSTI]

A method for treating a porous item constructed of metal powder, such as a powder made of Series 400 stainless steel, involves a step of preheating the porous item to a temperature of between about 700 and 900.degree. C. degrees in an oxidizing atmosphere and then sintering the body in an inert or reducing atmosphere at a temperature which is slightly below the melting temperature of the metal which comprises the porous item. The thermal stability of the resulting item is enhanced by this method so that the item retains its porosity and metallic characteristics, such as ductility, at higher (e.g. near-melting) temperatures.

Bischoff, Brian L. (Knoxville, TN); Sutton, Theodore G. (Kingston, TN); Judkins, Roddie R. (Knoxville, TN); Armstrong, Timothy R. (Clinton, TN); Adcock, Kenneth D. (Harriman, TN)

2010-11-09T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

A study of the electrical resistivity and capacitance of porous silicon films  

E-Print Network [OSTI]

is a surface or bulk phenomenon by varying the sizes of the porous silicon layer. 8. Porous silicon films have not been proved applicable of gas sensing appli- cations. However, porous silicon may be used to provide a mechanical support for widely.... These include HF, HC1, HsSO4, HNOs, KF, KC1, and caustic alkalis [4]. However, HF is the most widely used electrolyte, because the oxide that is almost always present on a silicon surface is readily soluble in HF [4]. It has been determined by Brattain...

Tai, Wing-cheong Albert

1987-01-01T23:59:59.000Z

122

Anion exchange polymer electrolytes  

DOE Patents [OSTI]

Solid anion exchange polymer electrolytes include chemical compounds comprising a polymer backbone with side chains that include guanidinium cations.

Kim, Yu Seung; Kim, Dae Sik

2013-09-10T23:59:59.000Z

123

Antimocrobial Polymer  

DOE Patents [OSTI]

A polymeric composition having antimicrobial properties and a process for rendering the surface of a substrate antimicrobial are disclosed. The composition comprises a crosslinked chemical combination of (i) a polymer having amino group-containing side chains along a backbone forming the polymer, (ii) an antimicrobial agent selected from quaternary ammonium compounds, gentian violet compounds, substituted or unsubstituted phenols, biguanide compounds, iodine compounds, and mixtures thereof, and (iii) a crosslinking agent containing functional groups capable of reacting with the amino groups. In one embodiment, the polymer is a polyamide formed from a maleic anhydride or maleic acid ester monomer and alkylamines thereby producing a polyamide having amino substituted alkyl chains on one side of the polyamide backbone; the crosslinking agent is a phosphine having the general formula (A)3P wherein A is hydroxyalkyl; and the antimicrobial agent is chlorhexidine, dimethylchlorophenol, cetyl pyridinium chloride, gentian violet, triclosan, thymol, iodine, and mixtures thereof.

McDonald, William F. (Utica, OH); Huang, Zhi-Heng (Walnut Creek, CA); Wright, Stacy C. (Columbus, GA)

2005-09-06T23:59:59.000Z

124

Antimicrobial Polymer  

DOE Patents [OSTI]

A polymeric composition having antimicrobial properties and a process for rendering the surface of a substrate antimicrobial are disclosed. The polymeric composition comprises a crosslinked chemical combination of (i) a polymer having amino group-containing side chains along a backbone forming the polymer, (ii) an antimicrobial agent selected from metals, metal alloys, metal salts, metal complexes and mixtures thereof, and (iii) a crosslinking agent containing functional groups capable of reacting with the amino groups. In one example embodiment, the polymer is a polyamide formed from a maleic anhydride or maleic acid ester monomer and alkylamines thereby producing a polyamide having amino substituted alkyl chains on one side of the polyamide backbone; the crosslinking agent is a phosphine having the general formula (A).sub.3 P wherein A is hydroxyalkyl; and the metallic antimicrobial agent is selected from chelated silver ions, silver metal, chelated copper ions, copper metal, chelated zinc ions, zinc metal and mixtures thereof.

McDonald, William F. (Utica, OH); Wright, Stacy C. (Flint, MI); Taylor, Andrew C. (Ann Arbor, MI)

2004-09-28T23:59:59.000Z

125

Ultra-low density microcellular polymer foam and method  

DOE Patents [OSTI]

An ultra-low density, microcellular open-celled polymer foam and a method for making such foam are disclosed. A polymer is dissolved in a heated solution consisting essentially of at least one solvent for the dissolution of the polymer in the heated solution and the phase inversion of the dissolved polymer to a liquid gel upon sufficient cooling of the heated solution. The heated solution is contained in a containment means provided with a nucleating promoting means having a relatively rough surface formed of fixed nucleating sites. The heated solution is cooled for a period of time sufficient to form a liquid gel of the polymer by phase inversion. From the gel, a porous foam having a density of less than about 12.0 mg/cm{sup 3} and open porosity provided by well interconnected strut morphology is formed.

Simandl, R.F.; Brown, J.D.

1996-03-19T23:59:59.000Z

126

Multicomponent Gas Diffusion in Porous Electrodes  

E-Print Network [OSTI]

Multicomponent gas transport is investigated with unprecedented precision by AC impedance analysis of porous YSZ anode-supported solid oxide fuel cells. A fuel gas mixture of H2-H2O-N2 is fed to the anode, and impedance data are measured across the range of hydrogen partial pressure (10-100%) for open circuit conditions at three temperatures (800C, 850C and 900C) and for 300mA applied current at 800C. For the first time, analytical formulae for the diffusion resistance (Rb) of three standard models of multicomponent gas transport (Fick, Stefan-Maxwell, and Dusty Gas) are derived and tested against the impedance data. The tortuosity is the only fitting parameter since all the diffusion coefficients are known. Only the Dusty Gas model leads to a remarkable data collapse for over twenty experimental conditions, using a constant tortuosity consistent with permeability measurements and the Bruggeman relation. These results establish the accuracy of the Dusty Gas model for multicomponent gas diffusion in porous med...

Fu, Yeqing; Dutta, Abhijit; Mohanram, Aravind; Pietras, John D; Bazant, Martin Z

2014-01-01T23:59:59.000Z

127

Nonequilibrium Thermodynamics of Porous Electrodes  

E-Print Network [OSTI]

We reformulate and extend porous electrode theory for non-ideal active materials, including those capable of phase transformations. Using principles of non-equilibrium thermodynamics, we relate the cell voltage, ionic ...

Ferguson, Todd Richard

128

Porous substrates filled with nanomaterials  

DOE Patents [OSTI]

A composition comprising: at least one porous carbon monolith, such as a carbon aerogel, comprising internal pores, and at least one nanomaterial, such as carbon nanotubes, disposed uniformly throughout the internal pores. The nanomaterial can be disposed in the middle of the monolith. In addition, a method for making a monolithic solid with both high surface area and good bulk electrical conductivity is provided. A porous substrate having a thickness of 100 microns or more and comprising macropores throughout its thickness is prepared. At least one catalyst is deposited inside the porous substrate. Subsequently, chemical vapor deposition is used to uniformly deposit a nanomaterial in the macropores throughout the thickness of the porous substrate. Applications include electrical energy storage, such as batteries and capacitors, and hydrogen storage.

Worsley, Marcus A.; Baumann, Theodore F.; Satcher, Jr., Joe H.; Stadermann, Michael

2014-08-19T23:59:59.000Z

129

Mesoscopic modeling of multi-physicochemical transport phenomena in porous media  

SciTech Connect (OSTI)

We present our recent progress on mesoscopic modeling of multi-physicochemical transport phenomena in porous media based on the lattice Boltzmann method. Simulation examples include injection of CO{sub 2} saturated brine into a limestone rock, two-phase behavior and flooding phenomena in polymer electrolyte fuel cells, and electroosmosis in homogeneously charged porous media. It is shown that the lattice Boltzmann method can account for multiple, coupled physicochemical processes in these systems and can shed some light on the underlying physics occuning at the fundamental scale. Therefore, it can be a potential powerful numerical tool to analyze multi-physicochemical processes in various energy, earth, and environmental systems.

Kang, Qinjin [Los Alamos National Laboratory; Wang, Moran [Los Alamos National Laboratory; Mukherjee, Partha P [Los Alamos National Laboratory; Lichtner, Peter C [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

130

Ammonia Capture in Porous Organic Polymers Densely Functionalized with  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearch HighlightsTools Printable Version Share thisToolsatturbines

131

Porous Polymer Networks: Synthesis, Porosity, and Applications in Gas  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome to theNews & Blog »PhysicsStorage/Separation |

132

Stable benzimidazole-incorporated porous polymer network for carbon capture  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearchScheduled System Highlights Power2014 EvaluateSpectroscopywith

133

Patent: Microfluidic devices and methods including porous polymer monoliths  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006 TheSteven AshbyDepartment ofGE's E. Trifon Laskarisfor protein|

134

Porous polymer fibers for low-loss Terahertz guiding  

E-Print Network [OSTI]

of this fiber type is also compared to that of the equivalent sub-wavelength rod-in-the-air fiber the collective vibrational dynamics of a protein in liquid water by terahertz absorption spectroscopy", Protein. Kawase, "Laser terahertz-emission microscope for inspecting electrical faults in integrated circuits

Skorobogatiy, Maksim

135

Modeling Methane Adsorption in Interpenetrating Porous Polymer Networks |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Regionat Cornell Batteries & Fuel Cells

136

Building multiple adsorption sites in porous polymer networks for carbon  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearch HighlightsToolsBESEnergyArchaeology onEnergyAbout »|capture

137

E-Print Network 3.0 - active polymer solids Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Minerals Collection: Materials Science ; Engineering 74 Switchable window based on electrochromic polymers Chunye Xu,a) Summary: design consists of an indium tin oxide (ITO) glass...

138

Conductive Polymers  

SciTech Connect (OSTI)

Electroluminescent devices such as light-emitting diodes (LED) and high-energy density batteries. These new polymers offer cost savings, weight reduction, ease of processing, and inherent rugged design compared to conventional semiconductor materials. The photovoltaic industry has grown more than 30% during the past three years. Lightweight, flexible solar modules are being used by the U.S. Army and Marine Corps for field power units. LEDs historically used for indicator lights are now being investigated for general lighting to replace fluorescent and incandescent lights. These so-called solid-state lights are becoming more prevalent across the country since they produce efficient lighting with little heat generation. Conductive polymers are being sought for battery development as well. Considerable weight savings over conventional cathode materials used in secondary storage batteries make portable devices easier to carry and electric cars more efficient and nimble. Secondary battery sales represent an $8 billion industry annually. The purpose of the project was to synthesize and characterize conductive polymers. TRACE Photonics Inc. has researched critical issues which affect conductivity. Much of their work has focused on production of substituted poly(phenylenevinylene) compounds. These compounds exhibit greater solubility over the parent polyphenylenevinylene, making them easier to process. Alkoxy substituted groups evaluated during this study included: methoxy, propoxy, and heptyloxy. Synthesis routes for production of alkoxy-substituted poly phenylenevinylene were developed. Considerable emphasis was placed on final product yield and purity.

Bohnert, G.W.

2002-11-22T23:59:59.000Z

139

Dutch gas plant uses polymer process to treat aromatic-saturated water  

SciTech Connect (OSTI)

A gas-processing plant in Harlingen, The Netherlands, operated by Elf Petroland has been running a porous-polymer extraction process since 1994 to remove aromatic compounds from water associated with produced natural gas. In the period, the unit has removed dispersed and dissolved aromatic compounds to a concentration of <1 ppm with energy consumption of only 17% that of a steam stripper, according to Paul Brooks, general manager for Akzo Nobel`s Macro Porous Polymer-Extraction (MPPE) systems. The paper describes glycol treatment the MPPE separation process, and the service contract for the system.

NONE

1998-11-02T23:59:59.000Z

140

Process of preparing tritiated porous silicon  

DOE Patents [OSTI]

A process of preparing tritiated porous silicon is described in which porous silicon is equilibrated with a gaseous vapor containing HT/T{sub 2} gas in a diluent for a time sufficient for tritium in the gas phase to replace hydrogen present in the pore surfaces of the porous silicon. 1 fig.

Tam, S.W.

1997-02-18T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Process of preparing tritiated porous silicon  

DOE Patents [OSTI]

A process of preparing tritiated porous silicon in which porous silicon is equilibrated with a gaseous vapor containing HT/T.sub.2 gas in a diluent for a time sufficient for tritium in the gas phase to replace hydrogen present in the pore surfaces of the porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1997-01-01T23:59:59.000Z

142

Metal recovery from porous materials  

DOE Patents [OSTI]

A method for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a porous matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF.sub.4 and HNO.sub.3 and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200.degree. C. The porous material can be pulverized before immersion to further increase the leach rate.

Sturcken, Edward F. (P.O. Box 900, Isle of Palms, SC 29451)

1992-01-01T23:59:59.000Z

143

Materials comprising polydienes and hydrophilic polymers and related methods  

DOE Patents [OSTI]

Materials prepared from polydienes, such as poly(cyclohexadiene), and hydrophilic polymers, such as poly(alkylene oxide), are described. Methods of making the materials and their use in fuel cell membranes, batteries, breathable chemical-biological protective materials, and templates for sol-gel polymerization are also provided. The materials can be crosslinked and sulfonated, and can include copolymers and polymer blends.

Mays, Jimmy W. (Knoxville, TN); Deng, Suxiang (Knoxville, TN); Mauritz, Kenneth A. (Hattiesburg, MS); Hassan, Mohammad K. (Hattiesburg, MS); Gido, Samuel P. (Hadley, MA)

2011-11-22T23:59:59.000Z

144

Metal oxide membranes for gas separation  

DOE Patents [OSTI]

A method for formation of a microporous ceramic membrane onto a porous support includes placing a colloidal suspension of metal oxide particles on one side of the porous support and exposing the other side of the porous support to a drying stream of gas or a reactive gas stream so that the particles are deposited on the drying side of the support as a gel. The gel so deposited can be sintered to form a supported ceramic membrane having mean pore sizes less than 30 Angstroms and useful for ultrafiltration, reverse osmosis, or gas separation. 4 figs.

Anderson, M.A.; Webster, E.T.; Xu, Q.

1994-08-30T23:59:59.000Z

145

Metal oxide membranes for gas separation  

DOE Patents [OSTI]

A method for permformation of a microporous ceramic membrane onto a porous support includes placing a colloidal suspension of metal oxide particles on one side of the porous support and exposing the other side of the porous support to a drying stream of gas or a reactive gas stream so that the particles are deposited on the drying side of the support as a gel. The gel so deposited can be sintered to form a supported ceramic membrane having mean pore sizes less than 30 Angstroms and useful for ultrafiltration, reverse osmosis, or gas separation.

Anderson, Marc A. (Madison, WI); Webster, Elizabeth T. (Madison, WI); Xu, Qunyin (Plainsboro, NJ)

1994-01-01T23:59:59.000Z

146

Precursors for the polymer-assisted deposition of films  

DOE Patents [OSTI]

A polymer assisted deposition process for deposition of metal oxide films is presented. The process includes solutions of one or more metal precursor and soluble polymers having binding properties for the one or more metal precursor. After a coating operation, the resultant coating is heated at high temperatures to yield metal oxide films. Such films can be epitaxial in structure and can be of optical quality. The process can be organic solvent-free.

McCleskey, Thomas M.; Burrell, Anthony K.; Jia, Quanxi; Lin, Yuan

2013-09-10T23:59:59.000Z

147

FLOW OF A FLUID THROUGH A POROUS SOLID DUE TO HIGH PRESSURE GRADIENTS  

E-Print Network [OSTI]

applications involving the flow of fluids through a porous media, like the problems of enhanced oil recovery and geotechnical engineering, for example problems such as enhanced oil recovery and carbon di-oxide sequestration than one fluid is involved such as steam and oil in enhanced oil recovery. However before embarking

Bonito, Andrea

148

Metal recovery from porous materials  

DOE Patents [OSTI]

The present invention relates to recovery of metals. More specifically, the present invention relates to the recovery of plutonium and other metals from porous materials using microwaves. The United States Government has rights in this invention pursuant to Contract No. DE-AC09-89SR18035 between the US Department of Energy and Westinghouse Savannah River Company.

Sturcken, E.F.

1991-01-01T23:59:59.000Z

149

Stack configurations for tubular solid oxide fuel cells  

DOE Patents [OSTI]

A fuel cell unit includes an array of solid oxide fuel cell tubes having porous metallic exterior surfaces, interior fuel cell layers, and interior surfaces, each of the tubes having at least one open end; and, at least one header in operable communication with the array of solid oxide fuel cell tubes for directing a first reactive gas into contact with the porous metallic exterior surfaces and for directing a second reactive gas into contact with the interior surfaces, the header further including at least one busbar disposed in electrical contact with at least one surface selected from the group consisting of the porous metallic exterior surfaces and the interior surfaces.

Armstrong, Timothy R. (Clinton, TN); Trammell, Michael P. (Clinton, TN); Marasco, Joseph A. (Kingston, TN)

2010-08-31T23:59:59.000Z

150

Nanocomposite polymer electrolyte for rechargeable magnesium batteries  

SciTech Connect (OSTI)

Nanocomposite polymer electrolytes present new opportunities for rechargeable magnesium batteries. However, few polymer electrolytes have demonstrated reversible Mg deposition/dissolution and those that have still contain volatile liquids such as tetrahydrofuran (THF). In this work, we report a nanocomposite polymer electrolyte based on poly(ethylene oxide) (PEO), Mg(BH4)2 and MgO nanoparticles for rechargeable Mg batteries. Cells with this electrolyte have a high coulombic efficiency of 98% for Mg plating/stripping and a high cycling stability. Through combined experiment-modeling investigations, a correlation between improved solvation of the salt and solvent chain length, chelation and oxygen denticity is established. Following the same trend, the nanocomposite polymer electrolyte is inferred to enhance the dissociation of the salt Mg(BH4)2 and thus improve the electrochemical performance. The insights and design metrics thus obtained may be used in nanocomposite electrolytes for other multivalent systems.

Shao, Yuyan; Rajput, Nav Nidhi; Hu, Jian Z.; Hu, Mary Y.; Liu, Tianbiao L.; Wei, Zhehao; Gu, Meng; Deng, Xuchu; Xu, Suochang; Han, Kee Sung; Wang, Jiulin; Nie, Zimin; Li, Guosheng; Zavadil, K.; Xiao, Jie; Wang, Chong M.; Henderson, Wesley A.; Zhang, Jiguang; Wang, Yong; Mueller, Karl T.; Persson, Kristin A.; Liu, Jun

2014-12-28T23:59:59.000Z

151

Bacteria transport through porous media. Annual report, December 31, 1984  

SciTech Connect (OSTI)

The following five chapters in this report have been processed separately for inclusion in the Energy Data Base: (1) theoretical model of convective diffusion of motile and non-motile bacteria toward solid surfaces; (2) interfacial electrochemistry of oxide surfaces in oil-bearing sands and sandstones; (3) effects of sodium pyrophosphate additive on the ''huff and puff''/nutrient flooding MEOR process; (4) interaction of Escherichia coli B, B/4, and bacteriophage T4D with Berea sandstone rock in relation to enhanced oil recovery; and (5) transport of bacteria in porous media and its significance in microbial enhanced oil recovery.

Yen, T.F.

1986-09-01T23:59:59.000Z

152

POROUS WALL, HOLLOW GLASS MICROSPHERES  

SciTech Connect (OSTI)

Hollow Glass Microspheres (HGM) is not a new technology. All one has to do is go to the internet and Google{trademark} HGM. Anyone can buy HGM and they have a wide variety of uses. HGM are usually between 1 to 100 microns in diameter, although their size can range from 100 nanometers to 5 millimeters in diameter. HGM are used as lightweight filler in composite materials such as syntactic foam and lightweight concrete. In 1968 a patent was issued to W. Beck of the 3M{trademark} Company for 'Glass Bubbles Prepared by Reheating Solid Glass Particles'. In 1983 P. Howell was issued a patent for 'Glass Bubbles of Increased Collapse Strength' and in 1988 H. Marshall was issued a patent for 'Glass Microbubbles'. Now Google{trademark}, Porous Wall, Hollow Glass Microspheres (PW-HGMs), the key words here are Porous Wall. Almost every article has its beginning with the research done at the Savannah River National Laboratory (SRNL). The Savannah River Site (SRS) where SRNL is located has a long and successful history of working with hydrogen and its isotopes for national security, energy, waste management and environmental remediation applications. This includes more than 30 years of experience developing, processing, and implementing special ceramics, including glasses for a variety of Department of Energy (DOE) missions. In the case of glasses, SRS and SRNL have been involved in both the science and engineering of vitreous or glass based systems. As a part of this glass experience and expertise, SRNL has developed a number of niches in the glass arena, one of which is the development of porous glass systems for a variety of applications. These porous glass systems include sol gel glasses, which include both xerogels and aerogels, as well as phase separated glass compositions, that can be subsequently treated to produce another unique type of porosity within the glass forms. The porous glasses can increase the surface area compared to 'normal glasses of a 1 to 2 order of magnitude, which can result in unique properties in areas such as hydrogen storage, gas transport, gas separations and purifications, sensors, global warming applications, new drug delivery systems and so on. One of the most interesting porous glass products that SRNL has developed and patented is Porous Wall, Hollow Glass Microspheres (PW-HGMs) that are being studied for many different applications. The European Patent Office (EPO) just recently notified SRS that the continuation-in-part patent application for the PW-HGMs has been accepted. The original patent, which was granted by the EPO on June 2, 2010, was validated in France, Germany and the United Kingdom. The microspheres produced are generally in the range of 2 to 100 microns, with a 1 to 2 micron wall. What makes the SRNL microspheres unique from all others is that the team in Figure 1 has found a way to induce and control porosity through the thin walls on a scale of 100 to 3000 {angstrom}. This is what makes the SRNL HW-HGMs one-of-a-kind, and is responsible for many of their unique properties and potential for various applications, including those in tritium storage, gas separations, H-storage for vehicles, and even a variety of new medical applications in the areas of drug delivery and MRI contrast agents. SRNL Hollow Glass Microspheres, and subsequent, Porous Wall, Hollow Glass Microspheres are fabricated using a flame former apparatus. Figure 2 is a schematic of the apparatus.

Sexton, W.

2012-06-30T23:59:59.000Z

153

Metal recovery from porous materials  

DOE Patents [OSTI]

A method is described for recovering plutonium and other metals from materials by leaching comprising the steps of incinerating the materials to form a porous matrix as the residue of incineration, immersing the matrix into acid in a microwave-transparent pressure vessel, sealing the pressure vessel, and applying microwaves so that the temperature and the pressure in the pressure vessel increase. The acid for recovering plutonium can be a mixture of HBF[sub 4] and HNO[sub 3] and preferably the pressure is increased to at least 100 PSI and the temperature to at least 200 C. The porous material can be pulverized before immersion to further increase the leach rate.

Sturcken, E.F.

1992-10-13T23:59:59.000Z

154

USE OF POLYMERS TO RECOVER VISCOUS OIL FROM UNCONVENTIONAL RESERVOIRS  

SciTech Connect (OSTI)

This final technical progress report summarizes work performed the project, 'Use of Polymers to Recover Viscous Oil from Unconventional Reservoirs.' The objective of this three-year research project was to develop methods using water soluble polymers to recover viscous oil from unconventional reservoirs (i.e., on Alaska's North Slope). The project had three technical tasks. First, limits were re-examined and redefined for where polymer flooding technology can be applied with respect to unfavorable displacements. Second, we tested existing and new polymers for effective polymer flooding of viscous oil, and we tested newly proposed mechanisms for oil displacement by polymer solutions. Third, we examined novel methods of using polymer gels to improve sweep efficiency during recovery of unconventional viscous oil. This report details work performed during the project. First, using fractional flow calculations, we examined the potential of polymer flooding for recovering viscous oils when the polymer is able to reduce the residual oil saturation to a value less than that of a waterflood. Second, we extensively investigated the rheology in porous media for a new hydrophobic associative polymer. Third, using simulation and analytical studies, we compared oil recovery efficiency for polymer flooding versus in-depth profile modification (i.e., 'Bright Water') as a function of (1) permeability contrast, (2) relative zone thickness, (3) oil viscosity, (4) polymer solution viscosity, (5) polymer or blocking-agent bank size, and (6) relative costs for polymer versus blocking agent. Fourth, we experimentally established how much polymer flooding can reduce the residual oil saturation in an oil-wet core that is saturated with viscous North Slope crude. Finally, an experimental study compared mechanical degradation of an associative polymer with that of a partially hydrolyzed polyacrylamide. Detailed results from the first two years of the project may be found in our first and second annual reports. Our latest research results, along with detailed documentation of our past work, can be found on our web site at http://baervan.nmt.edu/randy/. As an overall summary of important findings for the project, polymer flooding has tremendous potential for enhanced recovery of viscous oil. Fear of substantial injectivity reduction was a primary hurdle that limited application of polymer flooding. However, that concern is largely mitigated by (1) use of horizontal wells and (2) judicious injection above the formation parting pressure. Field cases now exist where 200-300-cp polymer solutions are injected without significant reductions in injectivity. Concern about costs associated with injection of viscous polymer solutions was a second major hurdle. However, that concern is reduced substantially by realization that polymer viscosity increases approximately with the square of polymer concentration. Viscosity can be doubled with only a 40% increase in polymer concentration. Up to a readily definable point, increases in viscosity of the injected polymer solution are directly related to increases in sweep efficiency and oil recovery. Previously published simulation results - suggesting that shear-thinning polymer solutions were detrimental to sweep efficiency - were shown to be unfounded (both theoretically and experimentally).

Randall Seright

2011-09-30T23:59:59.000Z

155

Method for producing flame retardant porous products and products produced thereby  

DOE Patents [OSTI]

A method for fire retarding porous products used for thermal energy storage and products produced thereby is provided. The method includes treating the surface of the phase change material-containing porous products with a urea fire-retarding agent. Upon exposure to a flame, the urea forms an adduct with the phase change material which will not sustain combustion (is self-extinguishing) in air. No halogens or metal oxides are contained in the fire retardant, so no potentially noxious halide smoke or fumes are emitted if the product is continuously exposed to a flame. 1 fig.

Salyer, I.O.

1998-08-04T23:59:59.000Z

156

Method for producing flame retardant porous products and products produced thereby  

DOE Patents [OSTI]

A method for fire retarding porous products used for thermal energy storage and products produced thereby is provided. The method includes treating the surface of the phase change material-containing porous products with a urea fire-retarding agent. Upon exposure to a flame, the urea forms an adduct with the phase change material which will not sustain combustion (is self-extinguishing) in air. No halogens or metal oxides are contained in the fire retardant, so no potentially noxious halide smoke or fumes are emitted if the product is continuously exposed to a flame.

Salyer, Ival O. (Dayton, OH)

1998-08-04T23:59:59.000Z

157

Method for Producing Flame Retardant Porous Products and Products Produced Thereby  

DOE Patents [OSTI]

A method for fire retarding porous products used for thermal energy storage and products produced thereby is provided. The method includes treating the surface of the phase change material-containing porous products with a urea fire-retarding agent. Upon exposure to a flame, the urea forms an adduct with the phase change material which will not sustain combustion (is self-extinguishing) in air. No halogens or metal oxides are contained in the fire retardant, so no potentially noxious halide smoke or fumes are emitted if the product is continuously exposed to a flame.

Salyer, Ival O. (Dayton, OH)

1998-08-04T23:59:59.000Z

158

Fuel cell with interdigitated porous flow-field  

DOE Patents [OSTI]

A polymer electrolyte membrane (PEM) fuel cell is formed with an improved system for distributing gaseous reactants to the membrane surface. A PEM fuel cell has an ionic transport membrane with opposed catalytic surfaces formed thereon and separates gaseous reactants that undergo reactions at the catalytic surfaces of the membrane. The fuel cell may also include a thin gas diffusion layer having first and second sides with a first side contacting at least one of the catalytic surfaces. A macroporous flow-field with interdigitated inlet and outlet reactant channels contacts the second side of the thin gas diffusion layer for distributing one of the gaseous reactants over the thin gas diffusion layer for transport to an adjacent one of the catalytic surfaces of the membrane. The porous flow field may be formed from a hydrophilic material and provides uniform support across the backside of the electrode assembly to facilitate the use of thin backing layers. 9 figs.

Wilson, M.S.

1997-06-24T23:59:59.000Z

159

Fuel cell with interdigitated porous flow-field  

DOE Patents [OSTI]

A polymer electrolyte membrane (PEM) fuel cell is formed with an improved system for distributing gaseous reactants to the membrane surface. A PEM fuel cell has an ionic transport membrane with opposed catalytic surfaces formed thereon and separates gaseous reactants that undergo reactions at the catalytic surfaces of the membrane. The fuel cell may also include a thin gas diffusion layer having first and second sides with a first side contacting at least one of the catalytic surfaces. A macroporous flow-field with interdigitated inlet and outlet reactant channels contacts the second side of the thin gas diffusion layer for distributing one of the gaseous reactants over the thin gas diffusion layer for transport to an adjacent one of the catalytic surfaces of the membrane. The porous flow field may be formed from a hydrophilic material and provides uniform support across the backside of the electrode assembly to facilitate the use of thin backing layers.

Wilson, Mahlon S. (Los Alamos, NM)

1997-01-01T23:59:59.000Z

160

Gas sensor incorporating a porous framework  

DOE Patents [OSTI]

The disclosure provides sensor for gas sensing including CO.sub.2 gas sensors comprising a porous framework sensing area for binding an analyte gas.

Yaghi, Omar M; Czaja, Alexander U; Wang, Bo; Galatsis, Kosmas; Wang, Kang L; Furukawa, Hiroyasu

2014-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Gas sensor incorporating a porous framework  

SciTech Connect (OSTI)

The disclosure provides sensor for gas sensing including CO.sub.2 gas sensors comprising a porous framework sensing area for binding an analyte gas.

Yaghi, Omar M.; Czaja, Alexander U.; Wang, Bo; Furukawa, Hiroyasu; Galatsis, Kosmas; Wang, Kang L.

2013-07-09T23:59:59.000Z

162

Atomic Layer Deposition of Indium Tin Oxide Thin Films Using Nonhalogenated Jeffrey W. Elam,*, David A. Baker, Alex B. F. Martinson,, Michael J. Pellin, and  

E-Print Network [OSTI]

precise coatings to be applied on all exposed surfaces of nanoporous substrates such as aerogels10 using ALD techniques to apply metal oxide coatings onto porous supports such as anodic aluminum oxide

163

Etching of porous and solid SiO2 in Ar/c-C4F8, O2/c-C4F8 and Ar/O2/c-C4F8 plasmas  

E-Print Network [OSTI]

and porous SiO2 in fluorocarbon plasmas and for etching of organic polymers in O2 plasmas have been.1063/1.1834979] I. INTRODUCTION Fluorocarbon plasma etching of SiO2 and low-dielectric constant (low-k) porous SiO2 of pattern transfer by fluorocarbon plasmas is in large part a result of the excellent selectivity which can

Kushner, Mark

164

Infrared Spectroscopy and Optical Constants of Porous Amorphous...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Spectroscopy and Optical Constants of Porous Amorphous Solid Water. Infrared Spectroscopy and Optical Constants of Porous Amorphous Solid Water. Abstract: Reflection-absorption...

165

Determination of Water Saturation in Relatively Dry Porous Media...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Water Saturation in Relatively Dry Porous Media Using Gas-phase Tracer Tests. Determination of Water Saturation in Relatively Dry Porous Media Using Gas-phase Tracer Tests....

166

Removal of Carbon Tetrachloride from a Layered Porous Medium...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Carbon Tetrachloride from a Layered Porous Medium by Means of Soil Vapor Extraction Enhanced by Desiccation and Water Removal of Carbon Tetrachloride from a Layered Porous Medium...

167

Removal of carbon tetrachloride from a layered porous medium...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

carbon tetrachloride from a layered porous medium by means of soil vapor extraction enhanced by desiccation and water Removal of carbon tetrachloride from a layered porous medium...

168

Hierarchically Porous Graphene as a Lithium-Air Battery Electrode...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hierarchically Porous Graphene as a Lithium-Air Battery Electrode. Hierarchically Porous Graphene as a Lithium-Air Battery Electrode. Abstract: Functionalized graphene sheets (FGS)...

169

ZnO/porous-Si and TiO{sub 2}/porous-Si nanocomposite nanopillars  

SciTech Connect (OSTI)

Porous Si nanopillar arrays are used as templates for atomic layer deposition of ZnO and TiO{sub 2}, and thus, ZnO/porous-Si and TiO{sub 2}/porous-Si nanocomposite nanopillars are fabricated. The diffusion of the precursor molecules into the inside of the porous structure occurs via Knudsen diffusion and is strongly limited by the small pore size. The luminescence of the ZnO/porous-Si nanocomposite nanopillars is also investigated, and the optical emission can be changed and even quenched after a strong plasma treatment. Such nanocomposite nanopillars are interesting for photocatalysis and sensors.

Wang, Dong, E-mail: dong.wang@tu-ilmenau.de; Yan, Yong; Schaaf, Peter [Chair Materials for Electronics, Institute of Materials Engineering and Institute of Micro- and Nanotechnologies MacroNano, TU Ilmenau, Gustav-Kirchhoff-Str. 5, 98693 Ilmenau (Germany); Sharp, Thomas [Oxford Instruments Plasma Technology Ltd., Yatton, Bristol BS49 4AP (United Kingdom); Schönherr, Sven; Ronning, Carsten [Institute for Solid State Physics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena (Germany); Ji, Ran [SUSS MicroTec Lithography GmbH, Schleissheimer Str. 90, 85748 Garching (Germany)

2015-01-01T23:59:59.000Z

170

A new method to simulate the effects of viscous fingering on miscible displacement processes in porous media  

SciTech Connect (OSTI)

Dispersion and viscous fingering are important parameters in miscible displacement. Effects of dispersion on concentration profiles in porous media can be simulated when the viscosity ratio is favorable. The capability to simulate viscous fingering is limited. This paper presents a new method to simulate effects of viscous fingering on miscible displacement processes in porous media. The method is based on the numerical solution of a general form of the convection-dispersion equation. In this equation the convection term is represented by a fractional flow function. The fractional flow function is derived from Darcy's law by using a concentration-dependent average viscosity and relative flow area to each fluid at any point in the bed. The method was extended to the description of a polymer flood by including retention and inaccessible PV. A Langmuir-type model for polymer retention in the rock was used. The resulting convection-dispersion equation for displacement by polymer was solved numerically by the use of a finite-element method with linear basis functions and Crank-Nicholson derivative approximation. History matches were performed on four sets of laboratory data to verify the model: (1) an unfavorable viscosity ratio displacement, (2) stable displacement of glycerol by polymer solution, (3) unstable displacement of brine by a slug of polymer solution, and (4) a favorable viscosity ratio displacement. In general, computed results from the model matched laboratory data closely. Good agreement of the model with experiments over a significant range of variables lends support to the analysis.

Vossoughi, S.; Green, D.W.; Smith, J.E.; Wilhite, G.P.

1984-02-01T23:59:59.000Z

171

Insulating polymer concrete  

DOE Patents [OSTI]

A lightweight insulating polymer concrete formed from a lightweight closed cell aggregate and a water resistance polymeric binder.

Schorr, H. Peter (Douglaston, NY); Fontana, Jack J. (Shirley, NY); Steinberg, Meyer (Melville, NY)

1987-01-01T23:59:59.000Z

172

Chemical phenomena in solid-state voltammetry in polymer solvents  

SciTech Connect (OSTI)

This paper, aimed at delineating significant chemical effects in solid-state voltammetry, describes electrochemical oxidations and reductions of electroactive monomer solutes dissolved in and diffusing through rigid and semirigid polymer electrolyte solvents. Sorption of organic monomer vapors into poly(ethylene oxide) films yields polymer solvents whose chemistry is dominated by that of the sorbed monomer as shown by coordination and precipitation effects. The dynamics of plasticization-induced changes in transport rates are quite rapid. Physical diffusion in the polymer solvent in slow enough that electron hopping reactions measurably enhance charge transport rates; the effect was used to estimate a lower limit for the (Co(bpy)/sub 3/)/sup 2+/+/ self-exchange rate constant of 2 /times/ 10/sup 9/ M/sup /minus/1/ s/sup /minus/1/. It is possible to erect polymeric film transport barriers at the electrode/polymer solvent interface and to measure the rate of permeation of monomer complexes from the polymer solvent into the polymer transport barrier film. Polymeric films of Os and Ru polypyridine complexes can be electropolymerized from polymer solutions of the corresponding monomers. Solid-state voltammetry can be extended to other polymer solvents including sulfonated polystyrene, poly(vinyl chloride), Nafion, and poly(acrylamide) gel.

Geng, L.; Reed, R.A.; Kim, M.H.; Wooster, T.T.; Oliver, B.N.; Egekeze, J.; Kennedy, R.T.; Jorgenson, J.W.; Parcher, J.F.; Murray, R.W.

1989-03-01T23:59:59.000Z

173

Modified cermet fuel electrodes for solid oxide electrochemical cells  

DOE Patents [OSTI]

An exterior porous electrode (10), bonded to a solid oxygen ion conducting electrolyte (13) which is in contact with an interior electrode (14), contains coarse metal particles (12) of nickel and/or cobalt, having diameters from 3 micrometers to 35 micrometers, where the coarse particles are coated with a separate, porous, multiphase layer (17) containing fine metal particles of nickel and/or cobalt (18), having diameters from 0.05 micrometers to 1.75 micrometers and conductive oxide (19) selected from cerium oxide, doped cerium oxide, strontium titanate, doped strontium titanate and mixtures thereof.

Ruka, Roswell J. (Churchill Boro, PA); Spengler, Charles J. (Murrysville, PA)

1991-01-01T23:59:59.000Z

174

Microelectromechanical pump utilizing porous silicon  

DOE Patents [OSTI]

A microelectromechanical (MEM) pump is disclosed which includes a porous silicon region sandwiched between an inlet chamber and an outlet chamber. The porous silicon region is formed in a silicon substrate and contains a number of pores extending between the inlet and outlet chambers, with each pore having a cross-section dimension about equal to or smaller than a mean free path of a gas being pumped. A thermal gradient is provided along the length of each pore by a heat source which can be an electrical resistance heater or an integrated circuit (IC). A channel can be formed through the silicon substrate so that inlet and outlet ports can be formed on the same side of the substrate, or so that multiple MEM pumps can be connected in series to form a multi-stage MEM pump. The MEM pump has applications for use in gas-phase MEM chemical analysis systems, and can also be used for passive cooling of ICs.

Lantz, Jeffrey W. (Albuquerque, NM); Stalford, Harold L. (Norman, OK)

2011-07-19T23:59:59.000Z

175

Moisture sensor based on evanescent wave light scattering by porous sol-gel silica coating  

DOE Patents [OSTI]

An optical fiber moisture sensor that can be used to sense moisture present in gas phase in a wide range of concentrations is provided, as well techniques for making the same. The present invention includes a method that utilizes the light scattering phenomenon which occurs in a porous sol-gel silica by coating an optical fiber core with such silica. Thus, a porous sol-gel silica polymer coated on an optical fiber core forms the transducer of an optical fiber moisture sensor according to an embodiment. The resulting optical fiber sensor of the present invention can be used in various applications, including to sense moisture content in indoor/outdoor air, soil, concrete, and low/high temperature gas streams.

Tao, Shiquan; Singh, Jagdish P.; Winstead, Christopher B.

2006-05-02T23:59:59.000Z

176

A Microfluidic Pore Network Approach to Investigate Water Transport in Fuel Cell Porous Transport Layers  

E-Print Network [OSTI]

Pore network modelling has traditionally been used to study displacement processes in idealized porous media related to geological flows, with applications ranging from groundwater hydrology to enhanced oil recovery. Very recently, pore network modelling has been applied to model the gas diffusion layer (GDL) of a polymer electrolyte membrane (PEM) fuel cell. Discrete pore network models have the potential to elucidate transport phenomena in the GDL with high computational efficiency, in contrast to continuum or molecular dynamics modelling that require extensive computational resources. However, the challenge in studying the GDL with pore network modelling lies in defining the network parameters that accurately describe the porous media as well as the conditions of fluid invasion that represent realistic transport processes. In this work, we discuss the first stage of developing and validating a GDL-representative pore network model. We begin with a two-dimensional pore network model with a single mobile pha...

Bazylak, A; Markicevic, B; Sinton, D; Djilali, N

2008-01-01T23:59:59.000Z

177

Nanoporous polymer electrolyte  

DOE Patents [OSTI]

A nanoporous polymer electrolyte and methods for making the polymer electrolyte are disclosed. The polymer electrolyte comprises a crosslinked self-assembly of a polymerizable salt surfactant, wherein the crosslinked self-assembly includes nanopores and wherein the crosslinked self-assembly has a conductivity of at least 1.0.times.10.sup.-6 S/cm at 25.degree. C. The method of making a polymer electrolyte comprises providing a polymerizable salt surfactant. The method further comprises crosslinking the polymerizable salt surfactant to form a nanoporous polymer electrolyte.

Elliott, Brian (Wheat Ridge, CO); Nguyen, Vinh (Wheat Ridge, CO)

2012-04-24T23:59:59.000Z

178

Metal-supported solid oxide fuel cells  

SciTech Connect (OSTI)

Low cost, colloidal deposition methods have been utilized to produce novel solid oxide fuel cell structures on metal alloy support electrodes. YSZ films were deposited on iron-chrome supports on top of a thin Ni/YSZ catalytic layer, and sintered at 1350 degrees C, in a reducing atmosphere. Dense, 20??m YSZ electrolyte films were obtained on highly porous stainless steel substrates.

Villarreal, I.; Jacobson, C.; Leming, A.; Matus, Y.; Visco, S.; De Jonghe, L.

2003-01-07T23:59:59.000Z

179

E-Print Network 3.0 - accumulation involving oxidative Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

of the polymer provides a constant source... of the various formulations on the rate of degradation of EPDM against chain oxidation involved in thermal and UV... the instability...

180

Bipolar plating of metal contacts onto oxide interconnection for solid oxide electrochemical cell  

DOE Patents [OSTI]

Disclosed is a method of forming an adherent metal deposit on a conducting layer of a tube sealed at one end. The tube is immersed with the sealed end down into an aqueous solution containing ions of the metal to be deposited. An ionically conducting aqueous fluid is placed inside the tube and a direct current is passed from a cathode inside the tube to an anode outside the tube. Also disclosed is a multi-layered solid oxide fuel cell tube which consists of an inner porous ceramic support tube, a porous air electrode covering the support tube, a non-porous electrolyte covering a portion of the air electrode, a non-porous conducting interconnection covering the remaining portion of the electrode, and a metal deposit on the interconnection.

Isenberg, Arnold O. (Forest Hills Boro, PA)

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

METAL COATING OF POROUS SILICON GAS SENSORS FOR IMPROVED SENSITIVITY & SELECTIVITY Thomas Osburn, Georgia Tech Physics, MSE SURF 2009 Fellow  

E-Print Network [OSTI]

METAL COATING OF POROUS SILICON GAS SENSORS FOR IMPROVED SENSITIVITY & SELECTIVITY Thomas Osburn Introduction Gas sensors on the market today have many limitations that prevent real world applications. The current standard, metal oxide sensors, are highly temperature dependant and work at high temperatures

Li, Mo

182

Winter Performance and Maintenance of Porous Asphalt Pavements  

E-Print Network [OSTI]

Concrete (HSG-B)Porous Asphalt (HSG-C) #12;Cold Climate Performance Results #12;12 Porous Asphalt SurfaceWinter Performance and Maintenance of Porous Asphalt Pavements Robert M. Roseen, Ph.D., P.E., D impacts for new development and reverse impacts in areas with redevelopment. #12;Porous Asphalt Design

183

Porous Pavement in Cold Climates Part: Performance and Cost  

E-Print Network [OSTI]

90 80 70 60 50 40 30 20 10 0 %RemovalEfficiency Porous Asphalt Pervious Concrete Retention Pond ` #12;17 Hydrrologic Performance of Porous Pavements Pervious Concrete (HSG-B)Porous Asphalt (HSG-C) #12;0 10 20 30 40Porous Pavement in Cold Climates Part: Performance and Cost Onondaga Environmental Institute 17

184

Diffuse charge and Faradaic reactions in porous electrodes  

E-Print Network [OSTI]

Porous electrodes instead of flat electrodes are widely used in electrochemical systems to boost storage

Biesheuvel, P. M.

185

Microgravity Laminar Diffusion Flame In A Perpendicular Fuel And Oxidizer Streams Configuration   

E-Print Network [OSTI]

Fuel is injected through a porous flat plate perpendicular to a stream of oxidizer flowing parallel to the surface of the burner for regimes corresponding to fire scenario in spacecrafts. Particle Image Velocimetry is ...

Brahmi, Lynda; Vietoris, Thomas; Rouvreau, Sebastien; Joulain, Pierre; David, L; Torero, Jose L

2005-01-01T23:59:59.000Z

186

Production of microporous aluminum oxide electrodes as supports for tethered lipid bilayers of large surface area.  

E-Print Network [OSTI]

1 Production of microporous aluminum oxide electrodes as supports for tethered lipid bilayers.Bourdillon@utc.fr Abstract A composite electrode made by association of gold and porous aluminum oxide has been used aluminum oxide; phospholipid bilayer; two-dimensional electrochemistry; ubiquinone lateral mobility. 1

Paris-Sud XI, Université de

187

Nanoscale Reinforced, Polymer Derived Ceramic Matrix Coatings  

SciTech Connect (OSTI)

The goal of this project was to explore and develop a novel class of nanoscale reinforced ceramic coatings for high temperature (600-1000 C) corrosion protection of metallic components in a coal-fired environment. It was focused on developing coatings that are easy to process and low cost. The approach was to use high-yield preceramic polymers loaded with nano-size fillers. The complex interplay of the particles in the polymer, their role in controlling shrinkage and phase evolution during thermal treatment, resulting densification and microstructural evolution, mechanical properties and effectiveness as corrosion protection coatings were investigated. Fe-and Ni-based alloys currently used in coal-fired environments do not possess the requisite corrosion and oxidation resistance for next generation of advanced power systems. One example of this is the power plants that use ultra supercritical steam as the working fluid. The increase in thermal efficiency of the plant and decrease in pollutant emissions are only possible by changing the properties of steam from supercritical to ultra supercritical. However, the conditions, 650 C and 34.5 MPa, are too severe and result in higher rate of corrosion due to higher metal temperatures. Coating the metallic components with ceramics that are resistant to corrosion, oxidation and erosion, is an economical and immediate solution to this problem. Good high temperature corrosion protection ceramic coatings for metallic structures must have a set of properties that are difficult to achieve using established processing techniques. The required properties include ease of coating complex shapes, low processing temperatures, thermal expansion match with metallic structures and good mechanical and chemical properties. Nanoscale reinforced composite coatings in which the matrix is derived from preceramic polymers have the potential to meet these requirements. The research was focused on developing suitable material systems and processing techniques for these coatings. In addition, we investigated the effect of microstructure on the mechanical properties and oxidation protection ability of the coatings. Coatings were developed to provide oxidation protection to both ferritic and austentic alloys and Ni-based alloys. The coatings that we developed are based on low viscosity pre-ceramic polymers. Thus they can be easily applied to any shape by using a variety of techniques including dip-coating, spray-coating and painting. The polymers are loaded with a variety of nanoparticles. The nanoparticles have two primary roles: control of the final composition and phases (and hence the properties); and control of the shrinkage during thermal decomposition of the polymer. Thus the selection of the nanoparticles was the most critical aspect of this project. Based on the results of the processing studies, the performance of selected coatings in oxidizing conditions (both static and cyclic) was investigated.

Rajendra Bordia

2009-07-31T23:59:59.000Z

188

Mechanics of amorphous polymers and polymer gels  

E-Print Network [OSTI]

Many applications of amorphous polymers require a thermo-mechanically coupled large-deformation elasto-viscoplasticity theory which models the strain rate and temperature dependent response of amorphous polymeric materials ...

Chester, Shawn Alexander

2011-01-01T23:59:59.000Z

189

Forced dewetting on porous media  

E-Print Network [OSTI]

We study the dewetting of a porous plate withdrawn from a bath of fluid. The microscopic contact angle is fixed to zero and the flow is assumed to be parallel to the plate (lubrication approximation). The ordinary differential equation involving the position of the water surface is analysed in phase space by means of numerical integration. We show the existence of a critical value of the capillary number $\\eta U / \\gamma$, above which no stationary contact line can exist. An analytical model, based on asymptotic matching is developed, that reproduces the dependence of the critical capillary number on the angle of the plate with respect to the horizontal for large control parameters (3/2 power law).

Olivier Devauchelle; Christophe Josserand; Stephane Zaleski

2005-09-13T23:59:59.000Z

190

X-ray and synchrotron studies of porous silicon  

SciTech Connect (OSTI)

The results of comprehensive studies of layers of porous silicon of different conductivity types, grown by anodizing standard Si(111) substrates in an electrolyte based on fluoric acid and ethanol with the addition of 5% of iodine and kept in air for a long time, are discussed. Measurements are performed by scanning electron microscopy, high-resolution X-ray diffraction, and ultrasoft X-ray spectroscopy using synchrotron radiation. The structural parameters of the layers (thickness, strain, and porosity) and atomic and chemical composition of the porous-silicon surface are determined. It is found that an oxide layer 1.5-2.3-nm thick is formed on the surface of the silicon skeleton. The near-edge fine structure of the Si 2p absorption spectrum of this layer corresponds to the fine structure of the 2p spectrum of well coordinated SiO{sub 2}. In this case, the fine structure in the Si 2p-edge absorption region of the silicon skeleton is identical to that of the 2p absorption spectrum of crystalline silicon.

Sivkov, V. N., E-mail: svn@dm.komisc.ru [Russian Academy of Sciences, Komi Scientific Center, Ural Branch (Russian Federation); Lomov, A. A. [Russian Academy of Sciences, Physical-Technological Institute (Russian Federation)] [Russian Academy of Sciences, Physical-Technological Institute (Russian Federation); Vasil'ev, A. L. [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation)] [Russian Academy of Sciences, Shubnikov Institute of Crystallography (Russian Federation); Nekipelov, S. V. [Komi State Pedagogical Institute (Russian Federation)] [Komi State Pedagogical Institute (Russian Federation); Petrova, O. V. [Russian Academy of Sciences, Komi Scientific Center, Ural Branch (Russian Federation)] [Russian Academy of Sciences, Komi Scientific Center, Ural Branch (Russian Federation)

2013-08-15T23:59:59.000Z

191

Multiphase flow in fractured porous media  

SciTech Connect (OSTI)

The major goal of this research project was to improve the understanding of the gas-oil two-phase flow in fractured porous media. In addition, miscible displacement was studied to evaluate its promise for enhanced recovery.

Firoozabadi, A.

1995-02-01T23:59:59.000Z

192

Anomalous transport through porous and fractured media  

E-Print Network [OSTI]

Anomalous transport, understood as the nonlinear scaling with time of the mean square displacement of transported particles, is observed in many physical processes, including contaminant transport through porous and fractured ...

Kang, Peter Kyungchul

2014-01-01T23:59:59.000Z

193

Aqueous biphasic plutonium oxide extraction process with pH and particle control  

DOE Patents [OSTI]

A method is described for simultaneously partitioning a metal oxide and silica from a material containing silica and the metal oxide, using a biphasic aqueous medium having immiscible salt and polymer phases. 2 figs.

Chaiko, D.J.; Mensah-Biney, R.

1997-04-29T23:59:59.000Z

194

Characterization of naturally occurring porous media  

E-Print Network [OSTI]

characteristics of natural occur- ring porous media, The gR /K dimensionless ratio is related to the minimum water saturation in the reverse manner as is permeability. REFERENCES Wyllie, M. R. J. and M. B. Spangler: Application of Electrical Resistivity...: Resistivity of Brine-Saturated Sands in Relation to Pore Seometry. Cornell, D. snd D. L. Kstz: Flow of Sases through Consolidated Porous Media. Industrial and En ineeri hemietr (October 1953) Vo . 5, p. 21 5. Leverett, N, C. : Capillary Behavior...

Riley, Robert Daniel

1965-01-01T23:59:59.000Z

195

Method for preparing porous metal hydride compacts  

DOE Patents [OSTI]

A method for preparing porous metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form porous metallic-matrix hydride compacts.

Ron, M.; Gruen, D.M.; Mendelsohn, M.H.; Sheft, I.

1980-01-21T23:59:59.000Z

196

Method for preparing porous metal hydride compacts  

DOE Patents [OSTI]

A method for preparing porous metallic-matrix hydride compacts which can be repeatedly hydrided and dehydrided without disintegration. A mixture of a finely divided metal hydride and a finely divided matrix metal is contacted with a poison which prevents the metal hydride from dehydriding at room temperature and atmospheric pressure. The mixture of matrix metal and poisoned metal hydride is then compacted under pressure at room temperature to form porous metallic-matrix hydride compacts.

Ron, Moshe (Haifa, IL); Gruen, Dieter M. (Downers Grove, IL); Mendelsohn, Marshall H. (Woodridge, IL); Sheft, Irving (Oak Park, IL)

1981-01-01T23:59:59.000Z

197

Combustion performance of porous silicon-based energetic composites  

SciTech Connect (OSTI)

The combustion performance of oxidizer filled porous silicon(PSi) was studied. PSi samples with diameters of 2.54 cm were fabricated by electrochemical etching. The % porosity of the samples ranged from 55 to 82%. The samples were cut into 3-5 mm strips and filled with the oxidizers NaClO{sub 4} x 1H{sub 2}O, Ca(ClO{sub 4}){sub 2} x 4H{sub 2}O, S and perfluoropolyether (PFPE). The filled PSi was then burned by igniting the sample with a hot NiChrome{trademark} wire. The burns were recorded using high speed photography from which bring rates were calculated. That burning rates showed a strong dependency on quality of the oxidizer loading. The % porosity did not appear to have a direct affect on the burning rates for those studied. PSi loaded with NaClO{sub 4} x 1H{sub 2}O produced burning rates that ranged from 216-349 cm/s. PSi loaded with Ca(ClO{sub 4}){sub x}x 4 H{sub 2}O had burning rates of 154-285 cm/s. An S filled PSi sample burned a rate of 16 to 290 cm/s, and perfluoropolyether loaded PSi burned at a rate of 1.4 cm/s.

Mason, Benjamin Aaron [Los Alamos National Laboratory; Son, Steve F [Los Alamos National Laboratory; Asay, Blaine W [Los Alamos National Laboratory; Cho, Kevin Y [PURDUE UNIV

2009-01-01T23:59:59.000Z

198

Composite Polymer Electrolytes Based on Poly(ethylene glycol) and Hydrophobic Fumed Silica: Dynamic  

E-Print Network [OSTI]

utilized in electrolyte processing. Introduction Rechargeable lithium batteries employing solid elec electrolytes based on poly(ethylene oxide) (PEO).1 Solid polymer electrolytes can potentially eliminate battery* Department of Chemical Engineering, North Carolina State University, Raleigh, North Carolina 27695

Raghavan, Srinivasa

199

Self-assembly of conformal polymer electrolyte film for lithium ion microbatteries  

E-Print Network [OSTI]

I apply the theory of polar and apolar intermolecular interactions to predict the behavior of combinations of common battery materials, specifically the cathode substrate lithium cobalt oxide (LCO) and the polymer separator ...

Bieber, Christalee

2007-01-01T23:59:59.000Z

200

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells  

E-Print Network [OSTI]

Growth of vertically aligned ZnO nanowalls for inverted polymer solar cells Zhiqiang Liang a,n a School of Material Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China b May 2013 Keywords: Inverted polymer solar cells Zinc oxide Nanowalls Aqueous solution growth a b s t r

Cao, Guozhong

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

A mixed-valence copper coordination polymer generated by hydrothermal metal/ligand redox reactions  

E-Print Network [OSTI]

A mixed-valence copper coordination polymer generated by hydrothermal metal/ligand redox reactions A novel coordination polymer of mixed-valence copper(I,II) with 4,4A-bipyridine and in situ oxidized and crystallographically char- acterized to be a laminated structure via weak copper(II)­ oxygen interactions. Extended

Li, Jing

202

Radioluminescent polymer lights  

SciTech Connect (OSTI)

The preparation of radioluminescent light sources where the tritium is located on the aryl-ring in a polymer has been demonstrated with deuterium/tritium substitution. This report discusses tests, results, and future applications of radioluminescent polymers. 10 refs. (FI)

Jensen, G.A.; Nelson, D.A.; Molton, P.M.

1990-09-01T23:59:59.000Z

203

SRNL POROUS WALL GLASS MICROSPHERES  

SciTech Connect (OSTI)

The Savannah River National Laboratory (SRNL) has developed a new medium for storage of hydrogen and other gases. This involves fabrication of thin, Porous Walled, Hollow Glass Microspheres (PW-HGMs), with diameters generally in the range of 1 to several hundred microns. What is unique about the glass microballons is that porosity has been induced and controlled within the thin, one micron thick walls, on the scale of 10 to several thousand Angstroms. This porosity results in interesting properties including the ability to use these channels to fill the microballons with special absorbents and other materials, thus providing a contained environment even for reactive species. Gases can now enter the microspheres and be retained on the absorbents, resulting in solid-state and contained storage of even reactive species. Also, the porosity can be altered and controlled in various ways, and even used to filter mixed gas streams within a system. SRNL is involved in about a half dozen different programs involving these PW-HGMs and an overview of some of these activities and results emerging are presented.

Wicks, G; Leung Heung, L; Ray Schumacher, R

2008-04-15T23:59:59.000Z

204

Imprinted Polymers in Wastewater Treatment  

SciTech Connect (OSTI)

In wastewater treatment, a method that specifically recognizes a variety of impurities in a flexible manner would be useful for treatment facilities with varying needs. Current purification techniques (i.e. bacteria, oxidation, reduction, precipitation and filtration) are nonspecific and difficult to control in complex mixtures. Heavy metal removal is particularly important in improving the efficiency of wastewater treatment, as they inhibit or even destroy the bacteria used for filtration. Imprinting polymerization is a technique that allows for the efficient removal of specific compounds and has been used in purification of enantiomers. It has potential to be applied in wastewater systems with the impurities acting as the template for the imprinting polymerization. The polymer with the bound impurities intact can then be removed via precipitation. After removal of the impurity the polymer can be reused. Data for the imprinting polymerization of polyacrylates and polyacrylamides for several metal complexes will be presented. Imprinting polymerization in combination with emulsion polymerization to improve the removal of hydrophobic contaminants will be described. Removal efficiencies will be presented and compared with conventional wastewater treatment methods.

Eastman, Christopher; Goodrich, Scott; Gartner, Isabelle; Mueller, Anja

2004-03-31T23:59:59.000Z

205

Catalytic iron oxide for lime regeneration in carbonaceous fuel combustion  

SciTech Connect (OSTI)

Lime utilization for sulfurous oxides absorption in fluidized combustion of carbonaceous fuels is improved by impregnation of porous lime particulates with iron oxide. The impregnation is achieved by spraying an aqueous solution of mixed iron sulfate and sulfite on the limestone before transfer to the fluidized bed combustor, whereby the iron compounds react with the limestone substrate to form iron oxide at the limestone surface. It is found that iron oxide present in the spent limestone acts as a catalyst to regenerate the spent limestone in a reducing environment. With only small quantities of iron oxide the calcium can be recycled at a significantly increased rate.

Shen, M.; Yang, R.T.

1980-09-30T23:59:59.000Z

206

New materials for intermediate-temperature solid oxide fuel cells to be powered by carbon- and sulfur-containing fuels.  

E-Print Network [OSTI]

??Unlike polymer electrolyte fuel cells, solid-oxide fuel cells (SOFCs) have the potential to use a wide variety of fuels, including hydrocarbons and gasified coal or… (more)

Yang, Lei

2011-01-01T23:59:59.000Z

207

Subnanometer Porous Thin Films by the Co-assembly of Nanotube Subunits and Block Copolymers  

SciTech Connect (OSTI)

Porous thin films containing subnanometer channels oriented normal to the surface exhibit unique transport and separation properties and can serve as selective membranes for separation and protective coatings. While molecularly defined nanoporous inorganic and organic materials abound, generating flexible nanoporous thin films with highly aligned channels over large areas has been elusive. Here, we developed a new approach where the growth of cyclic peptide nanotubes can be directed in a structural framework set by the self-assembly of block copolymers. By conjugating polymers to cyclic peptides, the subunit of an organic nanotube can be selectively solubilized in one copolymer microdomain. The conjugated polymers also mediate the interactions between nanotube and local medium and guide the growth of nanotubes in a confined geometry. This led to subnanometer porous membranes containing high-density arrays of through channels. This new strategy takes full advantage of nanoscopic assembly of BCPs and the reversibility of organic nanotube growth and circumvents impediments associated with aligning and organizing high aspect ratio nano-objects normal to the surface. Furthermore, the hierarchical coassembly strategy described demonstrates the feasibility of synchronizing multiple self-assembly processes to achieve hierarchically structured soft materials with molecular level control.

Xu, Ting; Zhao, Nana; Ren, Feng; Hourani, Rami; Lee, Ming Tsang; Shu, Jessica Y; Mao, Samuel; Helms, Brett A

2011-01-01T23:59:59.000Z

208

Poly(ethylene oxide) functionalization  

DOE Patents [OSTI]

A simple procedure is provided by which the hydroxyl termini of poly(ethylene oxide) can be appended with functional groups to a useful extent by reaction and precipitation. The polymer is dissolved in warmed toluene, treated with an excess of organic base and somewhat less of an excess of a reactive acylating reagent, reacted for several hours, then precipitated in isopropanol so that the product can be isolated as a solid, and salt byproducts are washed away. This procedure enables functionalization of the polymer while not requiring laborious purification steps such as solvent-solvent extraction or dialysis to remove undesirable side products.

Pratt, Russell Clayton

2014-04-08T23:59:59.000Z

209

The Crystallization Behavior of Porous PLA Prepared by Modified Solvent Casting/Particulate Leaching Technique for Potential Use of Tissue Engineering Scaffold  

E-Print Network [OSTI]

The porous PLA foams potential for tissue engineering usage are prepared by a modified solvent casting/particulate leaching method with different crystallinity. Since in typical method the porogens are solved in the solution and flow with the polymers during the casting and the crystallinity behavior of PLA chains in the limited space cannot be tracked, in this work the processing is modified by diffusing the PLA solution into a steady salt stack. With a thermal treatment before leaching while maintaining the stable structure of the porogens stack, the crystallinity of porous foams is made possible to control. The characterizations indicate the crystallization of porous foams is in a manner of lower crystallibility than the bulk materials. Pores and caves of around 250{\\mu}m size are obtained in samples with different crystallinity. The macro-structures are not much impaired by the crystallization nevertheless the morphological effect of the heating process is still obvious.

Ran Huang; Xiaomin Zhu; Haiyan Tu; Ajun Wan

2014-04-14T23:59:59.000Z

210

Fabrication and characterization of porous shape memory alloys  

E-Print Network [OSTI]

This work details an investigation into the production of porous shape memory alloys (SMAs) via hot isostatic press (HIP) from prealloyed powders. HIPing is one of three main methods for producing porous SMAs, the other two are conventional...

Penrod, Luke Edward

2004-09-30T23:59:59.000Z

211

Silvered polymer reflectors  

SciTech Connect (OSTI)

One of the principal objectives of the Solar Thermal Research Program is to develop silvered polymer films for constructing durable, low-cost, lightweight concentrating collectors for high temperature solar thermal systems. The mirrors are characterized for their solar-weighted (air mass 1.5) reflectance and exposed to environmental degradation. Photodegradation of polymers has also been studied using Fourier transform infrared spectroscopy supplemented with surface analysis characterization. Results are discussed for extruded films, ultraviolet effects, metallization, and the effects of polymer additives. (LEW)

Schissel, P.; Neidlinger, H.H.; Czanderna, A.W.

1985-03-01T23:59:59.000Z

212

Joining of porous silicon carbide bodies  

DOE Patents [OSTI]

A method of joining two porous bodies of silicon carbide is disclosed. It entails utilizing an aqueous slip of a similar silicon carbide as was used to form the porous bodies, including the sintering aids, and a binder to initially join the porous bodies together. Then the composite structure is subjected to cold isostatic pressing to form a joint having good handling strength. Then the composite structure is subjected to pressureless sintering to form the final strong bond. Optionally, after the sintering the structure is subjected to hot isostatic pressing to further improve the joint and densify the structure. The result is a composite structure in which the joint is almost indistinguishable from the silicon carbide pieces which it joins.

Bates, Carl H. (Worcester, MA); Couhig, John T. (Worcester, MA); Pelletier, Paul J. (Thompson, CT)

1990-05-01T23:59:59.000Z

213

Electron-beam patterning of polymer electrolyte films to make multiple nanoscale gates for nanowire transistors  

E-Print Network [OSTI]

We report an electron-beam based method for the nanoscale patterning of the poly(ethylene oxide)/LiClO$_{4}$ polymer electrolyte. We use the patterned polymer electrolyte as a high capacitance gate dielectric in single nanowire transistors and obtain subthreshold swings comparable to conventional metal/oxide wrap-gated nanowire transistors. Patterning eliminates gate/contact overlap which reduces parasitic effects and enables multiple, independently controllable gates. The method's simplicity broadens the scope for using polymer electrolyte gating in studies of nanowires and other nanoscale devices.

D. J. Carrad; A. M. Burke; R. W. Lyttleton; H. J. Joyce; H. H. Tan; C. Jagadish; K. Storm; H. Linke; L. Samuelson; A. P. Micolich

2014-04-08T23:59:59.000Z

214

Investigation of porous media structures using NMR restricted diffusion measurements  

E-Print Network [OSTI]

coefficient which produces a new description of molecule diffusion in porous media. Experimental Details Model porous media chosen for investigation are water saturated glass bead packs of different bead sizes from 50 to 300 microns. First the glass beads... is accessible with the aid of sufficiently developed analysis procedures, NMR techniques can be applied to porous structure analysis. For the hypothesis that water saturated in porous media consists of two phases: water removed from domain boundaries...

Miao, Peizhi

1993-01-01T23:59:59.000Z

215

Mechanical Properties of Porous-Matrix Ceramic Composites**  

E-Print Network [OSTI]

REVIEWS Mechanical Properties of Porous- Matrix Ceramic Composites** By Frank W. Zok* and Carlos G/Mechanical Properties of Porous-Matrix Ceramic Composites REVIEWS The porous matrix concept has been developed primarily. Levi 1. Introduction Damage tolerance can be enabled in continuous fiber-rein- forced ceramic

Zok, Frank

216

Method to prepare nanoparticles on porous mediums  

DOE Patents [OSTI]

A method to prepare porous medium decorated with nanoparticles involves contacting a suspension of nanoparticles in an ionic liquid with a porous medium such that the particles diffuse into the pores of the medium followed by heating the resulting composition to a temperature equal to or greater than the thermal decomposition temperature of the ionic liquid resulting in the removal of the liquid portion of the suspension. The nanoparticles can be a metal, an alloy, or a metal compound. The resulting compositions can be used as catalysts, sensors, or separators.

Vieth, Gabriel M. (Knoxville, TN) [Knoxville, TN; Dudney, Nancy J. (Oak Ridge, TN) [Oak Ridge, TN; Dai, Sheng (Knoxville, TN) [Knoxville, TN

2010-08-10T23:59:59.000Z

217

Sulfonated polyphenylene polymers  

DOE Patents [OSTI]

Improved sulfonated polyphenylene compositions, improved polymer electrolyte membranes and nanocomposites formed there from for use in fuel cells are described herein. The improved compositions, membranes and nanocomposites formed there from overcome limitations of Nafion.RTM. membranes.

Cornelius, Christopher J. (Albuquerque, NM); Fujimoto, Cy H. (Albuquerque, NM); Hickner, Michael A. (Albuquerque, NM)

2007-11-27T23:59:59.000Z

218

Heavily fluorinated electronic polymers  

E-Print Network [OSTI]

Building blocks, containing majority fluorine content by weight, for PPEs and PPVs have been synthesized. Some of the monomers were shown to give exclusively fluorous-phase soluble polymers, the syntheses of which were ...

Lim, Jeewoo

2011-01-01T23:59:59.000Z

219

Polymers in disordered environments  

E-Print Network [OSTI]

A brief review of our recent studies aiming at a better understanding of the scaling behaviour of polymers in disordered environments is given. The main emphasis is on a simple generic model where the polymers are represented by (interacting) self-avoiding walks and the disordered environment by critical percolation clusters. The scaling behaviour of the number of conformations and their average spatial extent as a function of the number of monomers and the associated critical exponents $\\gamma$ and $\

V. Blavatska; N. Fricke; W. Janke

2014-11-18T23:59:59.000Z

220

Solid polymer MEMS-based fuel cells  

DOE Patents [OSTI]

A micro-electro-mechanical systems (MEMS) based thin-film fuel cells for electrical power applications. The MEMS-based fuel cell may be of a solid oxide type (SOFC), a solid polymer type (SPFC), or a proton exchange membrane type (PEMFC), and each fuel cell basically consists of an anode and a cathode separated by an electrolyte layer. The electrolyte layer can consist of either a solid oxide or solid polymer material, or proton exchange membrane electrolyte materials may be used. Additionally catalyst layers can also separate the electrodes (cathode and anode) from the electrolyte. Gas manifolds are utilized to transport the fuel and oxidant to each cell and provide a path for exhaust gases. The electrical current generated from each cell is drawn away with an interconnect and support structure integrated with the gas manifold. The fuel cells utilize integrated resistive heaters for efficient heating of the materials. By combining MEMS technology with thin-film deposition technology, thin-film fuel cells having microflow channels and full-integrated circuitry can be produced that will lower the operating temperature an will yield an order of magnitude greater power density than the currently known fuel cells.

Jankowski, Alan F. (Livermore, CA); Morse, Jeffrey D. (Pleasant Hill, CA)

2008-04-22T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Reactor process using metal oxide ceramic membranes  

DOE Patents [OSTI]

A reaction vessel for use in photoelectrochemical reactions includes as its reactive surface a metal oxide porous ceramic membrane of a catalytic metal such as titanium. The reaction vessel includes a light source and a counter electrode. A provision for applying an electrical bias between the membrane and the counter electrode permits the Fermi levels of potential reaction to be favored so that certain reactions may be favored in the vessel. The electrical biasing is also useful for the cleaning of the catalytic membrane. Also disclosed is a method regenerating a porous metal oxide ceramic membrane used in a photoelectrochemical catalytic process by periodically removing the reactants and regenerating the membrane using a variety of chemical, thermal, and electrical techniques.

Anderson, Marc A. (Madison, WI)

1994-01-01T23:59:59.000Z

222

Reactor process using metal oxide ceramic membranes  

DOE Patents [OSTI]

A reaction vessel for use in photoelectrochemical reactions includes as its reactive surface a metal oxide porous ceramic membrane of a catalytic metal such as titanium. The reaction vessel includes a light source and a counter electrode. A provision for applying an electrical bias between the membrane and the counter electrode permits the Fermi levels of potential reaction to be favored so that certain reactions may be favored in the vessel. The electrical biasing is also useful for the cleaning of the catalytic membrane. Also disclosed is a method regenerating a porous metal oxide ceramic membrane used in a photoelectrochemical catalytic process by periodically removing the reactants and regenerating the membrane using a variety of chemical, thermal, and electrical techniques. 2 figures.

Anderson, M.A.

1994-05-03T23:59:59.000Z

223

Microbes encapsulated within crosslinkable polymers  

DOE Patents [OSTI]

The invention relates to porous films comprising crosslinked electrospun hydrogel fibers. Viable microbes are encapsulated within the crosslinked electrospun hydrogel fibers. The crosslinked electrospun hydrogel fibers are water insoluble and permeable. The invention also relates to methods of making and using such porous films.

Chidambaram, Devicharan; Liu, Ying; Rafailovich, Miriam H

2013-02-05T23:59:59.000Z

224

Open-cell glass crystalline porous material  

DOE Patents [OSTI]

An open-cell glass crystalline porous material made from hollow microspheres which are cenospheres obtained from fly ash, having an open-cell porosity of up to 90 vol. % is produced. The cenospheres are separated into fractions based on one or more of grain size, density, magnetic or non-magnetic, and perforated or non-perforated. Selected fractions are molded and agglomerated by sintering with a binder at a temperature below the softening temperature, or without a binder at a temperature about, or above, the softening temperature but below the temperature of liquidity. The porous material produced has an apparent density of 0.3-0.6 g/cm.sup.3, a compressive strength in the range of 1.2-3.5 MPa, and two types of openings: through-flow wall pores in the cenospheres of 0.1-30 micrometers, and interglobular voids between the cenospheres of 20-100 micrometers. The porous material of the invention has properties useful as porous matrices for immobilization of liquid radioactive waste, heat-resistant traps and filters, supports for catalysts, adsorbents and ion-exchangers.

Anshits, Alexander G. (Krasnoyarsk, RU); Sharonova, Olga M. (Krasnoyarsk, RU); Vereshchagina, Tatiana A. (Krasnoyarsk, RU); Zykova, Irina D. (Krasnoyarsk, RU); Revenko, Yurii A. (Zheleznogorsk, RU); Tretyakov, Alexander A. (Zheleznogorsk, RU); Aloy, Albert S. (Saint-Petersburg, RU); Lubtsev, Rem I. (Saint-Petersburg, RU); Knecht, Dieter A. (Idaho Falls, ID); Tranter, Troy J. (Idaho Falls, ID); Macheret, Yevgeny (Idaho Falls, ID)

2002-01-01T23:59:59.000Z

225

Porous radiant burners having increased radiant output  

DOE Patents [OSTI]

Means and methods for enhancing the output of radiant energy from a porous radiant burner by minimizing the scattering and increasing the adsorption, and thus emission of such energy by the use of randomly dispersed ceramic fibers of sub-micron diameter in the fabrication of ceramic fiber matrix burners and for use therein.

Tong, Timothy W. (Tempe, AZ); Sathe, Sanjeev B. (Tempe, AZ); Peck, Robert E. (Tempe, AZ)

1990-01-01T23:59:59.000Z

226

Methods of making metal oxide nanostructures and methods of controlling morphology of same  

DOE Patents [OSTI]

The present invention includes a method of producing a crystalline metal oxide nanostructure. The method comprises providing a metal salt solution and providing a basic solution; placing a porous membrane between the metal salt solution and the basic solution, wherein metal cations of the metal salt solution and hydroxide ions of the basic solution react, thereby producing a crystalline metal oxide nanostructure.

Wong, Stanislaus S; Hongjun, Zhou

2012-11-27T23:59:59.000Z

227

Porous, sintered metal filter recovers 100% of catalyst in H/sub 2/O/sub 2/ process  

SciTech Connect (OSTI)

Recovery of catalyst and prevention of catalyst from entering the oxidizer were plant problems for the Interox America process for production of H/sub 2/O/sub 2/ by the catalyzed alternative hydrogenation and oxidation of anthraquinone. A porous metal filter element was inserted in the filter unit following the hydrogenation stage to collect the catalyst which forms a permeable cake that is recovered by backwashing on a timer cycle. The porous metal filters consisting of a rigid matrix containing small pores applicable for the collection of very small particles (> 0.5 ..mu.. in liquids and 0.05 ..mu.. in gases) have been in use in plants in UK for 25 years with 75% of the original filter elements still in use. (BLM)

Hall, G.L.; Isaacs, M.

1982-01-01T23:59:59.000Z

228

Solid-particle erosion of bismaleimide polymers  

SciTech Connect (OSTI)

Solid-particle erosion of bismaleimide (BMI) polymers of various compositions was studied and compared with measured mechanical properties. For angular aluminum oxide erodents of mean diameter 42, 63, 143 or 390 {mu}m impacting normal to the surface at 60 m s{sup {minus}1}, the erosion rate was found to be a strong function of the size of the impacting particle. Material removal occurred primarily by a process of brittle-fracture-induced damage. However, the results suggest that for the BMI specimens, degradation and plasticity occurred in addition to fracture, and that the occurrence of these phenomena reduced the erosion rates.

Brandstaedter, A.; Goretta, K.C.; Routbort, J.L. [Argonne National Lab., IL (United States)] [Argonne National Lab., IL (United States); Groppi, D.P.; Karasek, K.R. [Allied-Signal Inc., Des Plaines, IL (United States)] [Allied-Signal Inc., Des Plaines, IL (United States)

1991-12-31T23:59:59.000Z

229

Antithrombogenic Polymer Coating.  

DOE Patents [OSTI]

An article having a non-thrombogenic surface and a process for making the article are disclosed. The article is formed by (i) coating a polymeric substrate with a crosslinked chemical combination of a polymer having at least two amino substituted side chains, a crosslinking agent containing at least two crosslinking functional groups which react with amino groups on the polymer, and a linking agent containing a first functional group which reacts with a third functional group of the crosslinking agent, and (ii) contacting the coating on the substrate with an antithrombogenic agent which covalently bonds to a second functional group of the linking agent. In one example embodiment, the polymer is a polyamide having amino substituted alkyl chains on one side of the polyamide backbone, the crosslinking agent is a phosphine having the general formula (A).sub.3 P wherein A is hydroxyalkyl, the linking agent is a polyhydrazide and the antithrombogenic agent is heparin.

Huang, Zhi Heng (San Ramon, CA); McDonald, William F. (Utica, OH); Wright, Stacy C. (Flint, MI); Taylor, Andrew C. (Ann Arbor, MI)

2003-01-21T23:59:59.000Z

230

FOR STIMULI-RESPONSIVE POLYMERS WITH ENHANCED EFFICIENCY IN RESERVOIR RECOVERY PROCESSES  

SciTech Connect (OSTI)

To date, our synthetic research efforts have been focused on the development of stimuli-responsive water-soluble polymers designed for use in enhanced oil recovery (EOR) applications. These model systems are structurally tailored for potential application as viscosifiers and/or mobility control agents for secondary and tertiary EOR methods. The following report discloses the progress of our ongoing research of polyzwitterions, polymers derived from monomers bearing both positive and negative charges, that show the ability to sustain or increase their hydrodynamic volume (and thus, solution viscosity) in the presence of electrolytes. Such polymers appear to be well-suited for use under conditions similar to those encountered in EOR operations. Additionally, we disclose the synthesis and characterization of a well-defined set of polyacrylamide (PAM) homopolymers that vary by MW. The MW of the PAM samples is controlled by addition of sodium formate to the polymerization medium as a conventional chain transfer agent. Data derived from polymer characterization is used to determine the kinetic parameter C{sub CT}, the chain transfer constant to sodium formate under the given polymerization conditions. The PAM homopolymer series will be employed in future set of experiments designed to test a simplified intrinsic viscosity equation. The flow resistance of a polymer solution through a porous medium is controlled by the polymer's hydrodynamic volume, which is strongly related to it's intrinsic viscosity. However, the hydrodynamic volume of a polymer molecule in an aqueous solution varies with fluid temperature, solvent composition, and polymer structure. This report on the theory of polymer solubility accentuates the importance of developing polymer solutions that increase in intrinsic viscosity when fluid temperatures are elevated above room conditions. The intrinsic viscosity response to temperature and molecular weight variations of three polymer solutions verified the modeling capability of a simplified intrinsic viscosity equation. These results imply that the simplified intrinsic viscosity equation is adequate in modeling polymer coil size response to solvent composition, temperature and polymer molecular weight. The equation can be used to direct efforts to produce superior polymers for mobility control during flooding of reservoirs at elevated temperatures.

Charles McCormick; Roger Hester

2002-04-29T23:59:59.000Z

231

Polymer quenched prealloyed metal powder  

DOE Patents [OSTI]

A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as .ltoreq.1% Cr, .gtoreq.0.05% Zr .ltoreq.2% Ti, .ltoreq.2% Mo, .ltoreq.1% Ni, .ltoreq.0.75% C, .ltoreq.0.1% B, .ltoreq.1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, .ltoreq.1% rare earth metal, and/or .ltoreq.3 % Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 .mu.m. Final stress relief annealing can be carried out in the B2 phase temperature range.

Hajaligol, Mohammad R. (Midlothian, VA); Fleischhauer, Grier (Midlothian, VA); German, Randall M. (State College, PA)

2001-01-01T23:59:59.000Z

232

Photoconductivity of structures based on the SnO{sub 2} porous matrix coupled with core-shell CdSe/CdS quantum dots  

SciTech Connect (OSTI)

Embedding of quantum dots into porous oxide matrixes is a perspective technique for photosensitization of a structure. We show that the sensitization efficiency may be increased by the use of core-shell quantum dots. It is demonstrated that the photoresponse amplitude in a SnO{sub 2} porous matrix with CdSe/CdS quantum dots depends non-monotonously on the number of atomic layers in a shell. The best results are obtained for SnO{sub 2} matrixes coupled with the quantum dots with three atomic layers of a shell. Mechanisms responsible for the structure sensitization are discussed.

Drozdov, K. A.; Kochnev, V. I.; Dobrovolsky, A. A.; Khokhlov, D. R. [Department of Physics, Moscow State University, 119991 Moscow (Russian Federation)] [Department of Physics, Moscow State University, 119991 Moscow (Russian Federation); Popelo, A. V. [Department of Materials Science, Moscow State University, 119991 Moscow (Russian Federation)] [Department of Materials Science, Moscow State University, 119991 Moscow (Russian Federation); Rumyantseva, M. N.; Gaskov, A. M.; Ryabova, L. I. [Department of Chemistry, Moscow State University, 119991 Moscow (Russian Federation)] [Department of Chemistry, Moscow State University, 119991 Moscow (Russian Federation); Vasiliev, R. B. [Department of Materials Science, Moscow State University, 119991 Moscow (Russian Federation) [Department of Materials Science, Moscow State University, 119991 Moscow (Russian Federation); Department of Chemistry, Moscow State University, 119991 Moscow (Russian Federation)

2013-09-23T23:59:59.000Z

233

POLYMER ELECTROLYTE FUEL CELLS  

E-Print Network [OSTI]

POLYMER ELECTROLYTE FUEL CELLS: The Gas Diffusion Layer Johannah Itescu Princeton University PRISM REU #12;PEM FUEL CELLS: A little background information I. What do fuel cells do? Generate electricity through chemical reaction #12;PEM FUEL CELLS: A little background information -+ + eHH 442 2 0244 22 He

Petta, Jason

234

Sedimentation of Knotted Polymers  

E-Print Network [OSTI]

We investigate the sedimentation of knotted polymers by means of stochastic rotation dynamics, a molecular dynamics algorithm that takes hydrodynamics fully into account. We show that the sedimentation coefficient s, related to the terminal velocity of the knotted polymers, increases linearly with the average crossing number n_c of the corresponding ideal knot. To the best of our knowledge, this provides the first direct computational confirmation of this relation, postulated on the basis of experiments in "The effect of ionic conditions on the conformations of supercoiled DNA. I. sedimentation analysis" by Rybenkov et al., for the case of sedimentation. Such a relation was previously shown to hold with simulations for knot electrophoresis. We also show that there is an accurate linear dependence of s on the inverse of the radius of gyration R_g^-1, more specifically with the inverse of the R_g component that is perpendicular to the direction along which the polymer sediments. When the polymer sediments in a slab, the walls affect the results appreciably. However, R_g^-1 remains to a good precision linearly dependent on n_c. Therefore, R_g^-1 is a good measure of a knot's complexity.

Joonas Piili; Davide Marenduzzo; Kimmo Kaski; Riku Linna

2012-12-20T23:59:59.000Z

235

High temperature polymer concrete  

DOE Patents [OSTI]

This invention is concerned with a polymer concrete composition, which is a two-component composition useful with many bases including metal. Component A, the aggregate composition, is broadly composed of silica, silica flour, portland cement, and acrylamide, whereas Component B, which is primarily vinyl and acrylyl reactive monomers, is a liquid system.

Fontana, J.J.; Reams, W.

1984-05-29T23:59:59.000Z

236

Gel polymer electrolytes for batteries  

DOE Patents [OSTI]

Nanostructured gel polymer electrolytes that have both high ionic conductivity and high mechanical strength are disclosed. The electrolytes have at least two domains--one domain contains an ionically-conductive gel polymer and the other domain contains a rigid polymer that provides structure for the electrolyte. The domains are formed by block copolymers. The first block provides a polymer matrix that may or may not be conductive on by itself, but that can soak up a liquid electrolyte, thereby making a gel. An exemplary nanostructured gel polymer electrolyte has an ionic conductivity of at least 1.times.10.sup.-4 S cm.sup.-1 at 25.degree. C.

Balsara, Nitash Pervez; Eitouni, Hany Basam; Gur, Ilan; Singh, Mohit; Hudson, William

2014-11-18T23:59:59.000Z

237

Heat transfer enhancement in a channel with porous baffles  

E-Print Network [OSTI]

with staggered positioned porous baffles. A numerical procedure was implemented, in conjunction with a commercially available Navier-Stokes solver, to model the turbulent flow in porous media. The Brinkman-Forchheimer-Extended Darcy model was used for modeling... fluid flow through the porous baffles. Conventional, one- equation, and two-equation models were used for heat transfer modeling. The accuracy and characteristics of each model were investigated and discussed. The results were compared...

Ko, Kang-Hoon

2005-02-17T23:59:59.000Z

238

Review of enhanced vapor diffusion in porous media  

SciTech Connect (OSTI)

Vapor diffusion in porous media in the presence of its own liquid has often been treated similar to gas diffusion. The gas diffusion rate in porous media is much lower than in free space due to the presence of the porous medium and any liquid present. However, enhanced vapor diffusion has also been postulated such that the diffusion rate may approach free-space values. Existing data and models for enhanced vapor diffusion, including those in TOUGH2, are reviewed in this paper.

Webb, S.W.; Ho, C.K.

1998-08-01T23:59:59.000Z

239

EMSL - oxides  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

oxides en Influence of Adsorption Site and Wavelength on the Photodesorption of NO from the (Fe,Cr)3O4(111) Mixed Oxide Surface. http:www.emsl.pnl.govemslwebpublications...

240

Desiccation of unsaturated porous media: Intermediate-scale experiment...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with the multifluid flow simulator STOMP, using independently obtained hydraulic and thermal porous medium properties. In all the experiments, the injection of dry air proved...

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Living Bacterial Sacrificial Porogens to Engineer Decellularized Porous Scaffolds  

E-Print Network [OSTI]

Decellularization and cellularization of organs have emerged as disruptive methods in tissue engineering and regenerative medicine. Porous hydrogel scaffolds have widespread applications in tissue engineering, regenerative ...

Xu, Feng

242

multiscale flow and transport in porous media - Department of ...  

E-Print Network [OSTI]

Multiphase ow and transport in heterogeneous porous media is typically ... we discuss two model problems: contaminant transport in aquifers and water ooding

243

Transport in Porous Media ISSN 0169-3913  

E-Print Network [OSTI]

-011-9720-2 Applicability of the Linearized Governing Equation of Gas Flow in Porous Media Jian Li · Hongbin Zhan · Guanhua

Zhan, Hongbin

244

Fast, Low Cost Method for Manufacturing Porous Structures for...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Advanced Materials Advanced Materials Find More Like This Return to Search Fast, Low Cost Method for Manufacturing Porous Structures for Fuel Cells, Catalysts and Filtration...

245

Quercetin as natural stabilizing agent for bio-polymer  

SciTech Connect (OSTI)

The introduction of antioxidants in polymers is the main way to prevent or delay the degradation process. In particular natural antioxidants receive attention in the food industry also because of their presumed safety. In this work bio-polymers, i.e. a commercial starch-based polymer (Mater-Bi®) and a bio-polyester (PLA), and a bio-polyether (PEO) were additivated with quercetin, a natural flavonoid antioxidants, in order to formulate bio-based films for ecosustainable packaging and outdoor applications. The photo-oxidation behavior of unstabilized and quercetin stabilized films was analyzed and compared with the behavior of films additivated with a commercial synthetic light stabilizer. The quercetin is able to slow down the photo-degradation rate of all bio-polymeric films investigated in similar way to the synthetic stabilizer.

Morici, Elisabetta [Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica, Universitŕ di Palermo, 90128 Palermo (Italy); Arrigo, Rossella; Dintcheva, Nadka Tzankova [Dipartimento di Ingegneria Civile, Ambientale, Aerospaziale, dei Materiali, Universitŕ di Palermo, 90128 Palermo (Italy)

2014-05-15T23:59:59.000Z

246

Etch-free Formation of Porous Silicon by High-energy Ion Irradiation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Etch-free Formation of Porous Silicon by High-energy Ion Irradiation. Etch-free Formation of Porous Silicon by High-energy Ion Irradiation. Abstract: In this study, porous silicon...

247

Low-Cost, Haziness-Free, Transparent Insulation Based On a Porous...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Low-Cost, Haziness-Free, Transparent Insulation Based On a Porous Silica Material Low-Cost, Haziness-Free, Transparent Insulation Based On a Porous Silica Material Image of porous...

248

The catalytic oxidation of propylene: investigation of catalyst activity.  

E-Print Network [OSTI]

- thur oxidation resulted in the formation oi' dioxymsthylperoxides acetalde- hydes formic aoids carbon monoxide, carbon dioxide~ hydrogen and water, &t temperatures above 500 degrees Centigrade the polymer1sation of eth- ylene became significant... that water vapor exerted a catalytio effeot on the oxidation of ethylene, while carbon dioxide showed no aooelerating effeot. Davis (ll) observed that water vapor possessed a oatalytio ei'- feet on ths oxidation of olefins. Thompson and Hinshslwood (SS...

Woodham, John Frank

1953-01-01T23:59:59.000Z

249

Synthesis and charge-transport properties of polymers derived from the oxidation of 1-hydro-1'-(6-(pyrrol-1-yl)hexyl)-4,4'-bipyridium Bis(hexafluorophosphate) and demonstration of pH-sensitive microelectrochemical transistor derived from the redox properties of a conventional redox center  

SciTech Connect (OSTI)

This article describes the synthesis and electrochemical properties of redox polymers, having a polypyrrole backbone and viologen subunits, derived from oxidative electropolymerization of 1-methyl-1'-(6-(pyrrol-1-yl)hexyl)-4,4'-bipyridinium (P-V-Me/sup 2 +/) and 1-hydro-1'-(6-(pyrrol-1-yl)hexyl)-4,4'-bipyridinium (P-V-H/sup 2 +/). Closely spaced (approx. 1.5 ..mu..M) Au microelectrode arrays (approx. 2.5 ..mu..m wide /times/ 50 ..mu..m long /times/ 0.1 ..mu..m high) modified with the polymers can be used to study aspects of the charge-transport behavior of the viologen redox system. Poly(P-V-Me/sup 2 +/) have been used to investigate the characteristics of microelectrochemical transistors based on a viologen redox center and a similar redox center, protonated, monoquaternized bipyridinium, which is pH dependent. The interesting properties from poly(P-V-Me/sup 2 +/) and poly(P-V-H/sup 2 +/) stem from behavior of the pendant viologen redox centers. The device based on poly(P-V-Me/sup 2 +/) has a narrow region (approx. 200 mV) of gate voltage, V/sub G/, where the source-drain current, I/sub D/, is nonzero and has a sharp, pH-independent peak in the I/sub D/-V/sub G/ plot at approx. 0.53 V versus SCE associated with the reversible, one-electron reduction of viologen. This result is consistent with electron self-exchange between redox centers being the mechanism for charge transport. The device based on poly(P-V-H/sup 2 +/) shows a pH-dependent I/sub D/ at fixed V/sub G/, as expected from the electrochemical behavior from reversible protonation of the terminal N of the bipyridinium group of poly(P-V-H/sup 2 +/). The microelectrochemical transistor based on poly(P-V-H/sup 2 +/) illustrates the design of chemically sensitive, molecule-based devices using conventional redox materials.

Shu, C.F.; Wrighton, M.S.

1988-09-08T23:59:59.000Z

250

Method of preparing porous, rigid ceramic separators for an electrochemical cell  

DOE Patents [OSTI]

Porous, rigid separators for electrochemical cells are prepared by first calcining particles of ceramic material at temperatures above about 1200.degree. C. for a sufficient period of time to reduce the sinterability of the particles. A ceramic powder that has not been calcined is blended with the original powder to control the porosity of the completed separator. The ceramic blend is then pressed into a sheet of the desired shape and sintered at a temperature somewhat lower than the calcination temperature. Separator sheets of about 1 to 2.5 mm thickness and 30 to 70% porosity can be prepared by this technique. Ceramics such as yttria, magnesium oxide and magnesium-aluminum oxide have advantageously been used to form separators by this method.

Bandyopadhyay, Gautam (Naperville, IL); Dusek, Joseph T. (Downers Grove, IL)

1981-01-01T23:59:59.000Z

251

Porous membrane electrochemical cell for uranium and transuranic recovery from molten salt electrolyte  

DOE Patents [OSTI]

An improved process and device for the recovery of the minor actinides and the transuranic elements (TRU's) from a molten salt electrolyte. The process involves placing the device, an electrically non-conducting barrier between an anode salt and a cathode salt. The porous barrier allows uranium to diffuse between the anode and cathode, yet slows the diffusion of uranium ions so as to cause depletion of uranium ions in the catholyte. This allows for the eventual preferential deposition of transuranics present in spent nuclear fuel such as Np, Pu, Am, Cm. The device also comprises an uranium oxidation anode. The oxidation anode is solid uranium metal in the form of spent nuclear fuel. The spent fuel is placed in a ferric metal anode basket which serves as the electrical lead or contact between the molten electrolyte and the anodic uranium metal.

Willit, James L. (Ratavia, IL)

2007-09-11T23:59:59.000Z

252

Porous membrane electrochemical cell for uranium and transuranic recovery from molten salt electrolyte  

DOE Patents [OSTI]

An improved process and device for the recovery of the minor actinides and the transuranic elements (TRU's) from a molten salt electrolyte. The process involves placing the device, an electrically non-conducting barrier between an anode salt and a cathode salt. The porous barrier allows uranium to diffuse between the anode and cathode, yet slows the diffusion of uranium ions so as to cause depletion of uranium ions in the catholyte. This allows for the eventual preferential deposition of transuranics present in spent nuclear fuel such as Np, Pu, Am, Cm. The device also comprises an uranium oxidation anode. The oxidation anode is solid uranium metal in the form of spent nuclear fuel. The spent fuel is placed in a ferric metal anode basket which serves as the electrical lead or contact between the molten electrolyte and the anodic uranium metal.

Willit, James L. (Batavia, IL)

2010-09-21T23:59:59.000Z

253

Effect of La2Zr2O7 on Interfacial Resistance in Solid Oxide J. R. Smith,a  

E-Print Network [OSTI]

Effect of La2Zr2O7 on Interfacial Resistance in Solid Oxide Fuel Cells A. Chen,a J. R. Smith,a K. L manuscript received August 9, 2010. Published September 14, 2010. Solid oxide fuel cells SOFC are energy to gas phase transport in porous media, is controlled by optimizing electrode mi- crostructures

Florida, University of

254

In Situ One-Step Synthesis of Hierarchical Nitrogen-Doped Porous...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Synthesis of Hierarchical Nitrogen-Doped Porous Carbon for High Performance Supercapacitors. In Situ One-Step Synthesis of Hierarchical Nitrogen-Doped Porous Carbon for High...

255

High-throughput Characterization of Porous Materials Using Graphics Processing Units  

E-Print Network [OSTI]

A.E. ; Purcell, T. Computer Graphics Forum 2007, 26(1), 80-of Porous Materials Using Graphics Processing Units Jihanof Porous Materials Using Graphics Processing Units Jihan

Kim, Jihan

2013-01-01T23:59:59.000Z

256

Lightweight polymer concrete composites  

SciTech Connect (OSTI)

Lightweight polymer concrete composites have been developed with excellent insulating properties. The composites consist of lightweight aggregates such as expanded perlites, multicellular glass nodules, or hollow alumina silicate microspheres bound together with unsaturated polyester or epoxy resins. These composites, known as Insulating Polymer Concrete (IPC), have thermal conductivites from 0.09 to 0.19 Btu/h-ft-/sup 0/F. Compressive strengths, dependent upon the aggregates used, range from 1000 to 6000 psi. These materials can be precast or cast-in-place on concrete substrates. Recently, it has been demonstrated that these materials can also be sprayed onto concrete and other substrates. An overlay application of IPC is currently under way as dike insulation at an LNG storage tank facility. The composites have numerous potentials in the construction industry such as insulating building blocks or prefabricated insulating wall panels.

Fontana, J.J.; Steinberg, M.; Reams, W.

1985-08-01T23:59:59.000Z

257

Electrochemical patterning of the surface of insulators with electrically conductive polymers  

SciTech Connect (OSTI)

The great potential of {pi}-conjugated polymers, especially polyacetylene, polyarylenes, and poly(arylenevinylene)s, as components in optical displays, sensors, rechargeable batteries, electromagnetic interference shielding, and microelectronics is well recognized. This paper presents a protocol for patterning the surface of insulators with electrically conductive polymers. The pattern is formed on a gold electrode surface via electro-oxidation of heteroarene monomers. An adhesion layer is used to bond the surface of the conducting polymer pattern to the surface of an insulator. The pattern is then developed by etching away the gold. The approach is illustrated with polypyrrole and is applicable to a wide range of substituted polyheteroarenes and insulating substrates.

Zheng, X.Y.; Ding, Y.; Bottomley, L.A. [Georgia Inst. of Tech., Atlanta, GA (United States)

1995-12-01T23:59:59.000Z

258

Solid polymer electrolytes  

DOE Patents [OSTI]

This invention relates to Li ion (Li.sup.+) conductive solid polymer electrolytes composed of poly(vinyl sulfone) and lithium salts, and their use in all-solid-state rechargeable lithium ion batteries. The lithium salts comprise low lattice energy lithium salts such as LiN(CF.sub.3 SO.sub.2).sub.2, LiAsF.sub.6, and LiClO.sub.4.

Abraham, Kuzhikalail M. (Needham, MA); Alamgir, Mohamed (Dedham, MA); Choe, Hyoun S. (Waltham, MA)

1995-01-01T23:59:59.000Z

259

Solid polymer electrolytes  

DOE Patents [OSTI]

This invention relates to Li ion (Li{sup +}) conductive solid polymer electrolytes composed of poly(vinyl sulfone) and lithium salts, and their use in all-solid-state rechargeable lithium ion batteries. The lithium salts comprise low lattice energy lithium salts such as LiN(CF{sub 3}SO{sub 2}){sub 2}, LiAsF{sub 6}, and LiClO{sub 4}. 2 figs.

Abraham, K.M.; Alamgir, M.; Choe, H.S.

1995-12-12T23:59:59.000Z

260

Low band gap polymers Organic Photovoltaics  

E-Print Network [OSTI]

Low band gap polymers for Organic Photovoltaics Eva Bundgaard Ph.D. Dissertation Risř National Bundgaard Title: Low band gap polymers for Organic photovoltaics Department: The polymer department Report the area of organic photovoltaics are focusing on low band gap polymers, a type of polymer which absorbs

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Characterizing unsaturated diffusion in porous tuff gravel  

SciTech Connect (OSTI)

Evaluation of solute diffusion in unsaturated porous gravel is very important for investigations of contaminant transport and remediation, risk assessment, and waste disposal (for example, the potential high-level nuclear waste repository at Yucca Mountain, Nevada). For a porous aggregate medium such as granular tuff, the total water content is comprised of surface water and interior water. The surface water component (water film around grains and pendular water between the grain contacts) could serve as a predominant diffusion pathway. To investigate the extent to which surface water films and contact points affect solute diffusion in unsaturated gravel, we examined the configuration of water using x-ray computed tomography in partially saturated gravel, and made quantitative measurements of diffusion at multiple water contents using two different techniques. In the first, diffusion coefficients of potassium chloride in 2-4 mm granular tuff at multiple water contents were calculated from electrical conductivity measurements using the Nernst-Einstein equation. In the second, we used laser ablation with inductively coupled plasma-mass spectrometry to perform micro-scale mapping, allowing the measurement of diffusion coefficients for a mixture of chemical tracers for tuff cubes and tetrahedrons having two contact geometries (cube-cube and cube-tetrahedron). The x-ray computed tomography images show limited contact between grains, and this could hinder the pathways for diffusive transport. Experimental results show the critical role of surface water in controlling transport pathways and hence the magnitude of diffusion. Even with a bulk volumetric water content of 1.5%, the measured solute diffusion coefficient is as low as 1.5 x 10{sup -14} m{sup 2}/s for tuff gravel. Currently used diffusion models relating diffusion coefficients to total volumetric water content inadequately describe unsaturated diffusion behavior in porous gravel at very low water contents.

Hu, Qinhong; Kneafsey, Timothy J.; Roberts, Jeffery J.; Tomutsa, Liviu; Wang, Joseph, S.Y.

2003-11-12T23:59:59.000Z

262

Chaotic behavior of ion exchange phenomena in polymer gel electrolytes through irradiated polymeric membrane  

E-Print Network [OSTI]

A desktop experiment has been done to show the nonlinearity in the I-V characteristics of an ion conducting electrochemical micro-system. Its chaotic dynamics is being reported for the first time which has been captured by an electronic circuit. Polyvinylidene fluoride-co-hexafluoropropene (PVdF-HFP) gel electrolyte comprising of a combination of plasticizers (ethylene carbonate and propylene carbonate) and salts have been prepared to study the exchange of ions through porous poly ethylene terephthalate (PET) membranes. The nonlinearity of this system is due to the ion exchange of the polymer gel electrolytes (PGEs) through a porous membrane. The different regimes of spiking and non-spiking chaotic motions are being presented. The possible applications are highlighted.

Sangeeta Rawat; Barnamala Saha; Awadhesh Prasad; Amita Chandra

2012-04-18T23:59:59.000Z

263

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Atrazhev, Vadim V; Dmitriev, Dmitry V; Erikhman, Nikolay S; Sultanov, Vadim I; Patterson, Timothy; Burlatsky, Sergei F

2014-01-01T23:59:59.000Z

264

The model of stress distribution in polymer electrolyte membrane  

E-Print Network [OSTI]

An analytical model of mechanical stress in a polymer electrolyte membrane (PEM) of a hydrogen/air fuel cell with porous Water Transfer Plates (WTP) is developed in this work. The model considers a mechanical stress in the membrane is a result of the cell load cycling under constant oxygen utilization. The load cycling causes the cycling of the inlet gas flow rate, which results in the membrane hydration/dehydration close to the gas inlet. Hydration/dehydration of the membrane leads to membrane swelling/shrinking, which causes mechanical stress in the constrained membrane. Mechanical stress results in through-plane crack formation. Thereby, the mechanical stress in the membrane causes mechanical failure of the membrane, limiting fuel cell lifetime. The model predicts the stress in the membrane as a function of the cell geometry, membrane material properties and operation conditions. The model was applied for stress calculation in GORE-SELECT.

Vadim V. Atrazhev; Tatiana Yu. Astakhova; Dmitry V. Dmitriev; Nikolay S. Erikhman; Vadim I. Sultanov; Timothy Patterson; Sergei F. Burlatsky

2014-01-17T23:59:59.000Z

265

Protein separations using porous silicon membranes  

E-Print Network [OSTI]

charge or as the absence of an electron in the crystal structure of silicon. The properties of boron doped siTicon are exploited experimentally by setting up an etch cell in which one surface of the silicon serves as the anode and by using... terminals located on the top surface of the etch cell. The current to be used in the experiment and the total time were previously calculated to produce the desired average pore size and porous silicon film thickness, respectively. The power source...

Pass, Shannon Marie

1992-01-01T23:59:59.000Z

266

A rigid porous filter and filtration method  

SciTech Connect (OSTI)

The present invention involves a porous rigid filter comprising a plurality of concentric filtration elements having internal flow passages and forming external flow passages there between. The present invention also involves a pressure vessel containing the filter for the removal of particulate from high pressure particulate containing gases, and further involves a method for using the filter to remove such particulate. The present filter has the advantage of requiring fewer filter elements due to the high surface area- to-volume ratio provided by the filter, requires a reduced pressure vessel size, and exhibits enhanced mechanical design properties, improved cleaning properties, configuration options, modularity and ease of fabrication.

Chiang, Ta-Kuan; Straub, Douglas, Straub L.; Dennis, Richard A.

1998-12-01T23:59:59.000Z

267

Polymer Thermodynamics and Chain Structure Polymers display some similarities and some differences with nano-aggregates.  

E-Print Network [OSTI]

for aggregates and by the late Paul Flory of Stanford for polymer coils. Since the spring constant of a polymer of a polymer coil is largely determined by entropy, an individual polymer coil displays an increasing spring an aggregate in nanomaterials and a polymer coil in Polymer Science. The mass-fractal or minimum dimension

Beaucage, Gregory

268

Apparatus and method for oxidation and stabilization of polymeric materials  

DOE Patents [OSTI]

An apparatus for treating polymeric materials comprises a treatment chamber adapted to maintain a selected atmosphere; a means for supporting the polymeric material within the chamber; and, a source of plasma-derived gas containing at least one reactive oxidative species whereby the polymer is stabilized and cross linked through exposure to the oxidative species in the chamber at a selected temperature. The polymer may be directly exposed to the plasma, or alternatively, the plasma may be established in a separate volume from which the reactive species may be extracted and introduced into the vicinity of the polymer. The apparatus may be configured for either batch-type or continuous-type processing. The apparatus and method are especially useful for preparing polymer fibers, particularly PAN fibers, for later carbonization treatments.

Paulauskas, Felix L. (Knoxville, TN) [Knoxville, TN; White, Terry L. (Knoxville, TN) [Knoxville, TN; Sherman, Daniel M. (Knoxville, TN) [Knoxville, TN

2009-05-19T23:59:59.000Z

269

Apparatus and method for oxidation and stabilization of polymeric materials  

DOE Patents [OSTI]

An apparatus for treating polymeric materials comprises a treatment chamber adapted to maintain a selected atmosphere; a means for supporting the polymeric material within the chamber; and, a source of plasma-derived gas containing at least one reactive oxidative species whereby the polymer is stabilized and cross linked through exposure to the oxidative species in the chamber at a selected temperature. The polymer may be directly exposed to the plasma, or alternatively, the plasma may be established in a separate volume from which the reactive species may be extracted and introduced into the vicinity of the polymer. The apparatus may be configured for either batch-type or continuous-type processing. The apparatus and method are especially useful for preparing polymer fibers, particularly PAN fibers, for later carbonization treatments.

Paulauskas, Felix L. (Knoxville, TN) [Knoxville, TN; White, Terry L. (Knoxville, TN) [Knoxville, TN; Sherman, Daniel M. (Knoxville, TN) [Knoxville, TN

2010-08-31T23:59:59.000Z

270

TERMINATION OF THE POROUS WALL CONCEPT To: APEX GROUP  

E-Print Network [OSTI]

TERMINATION OF THE POROUS WALL CONCEPT To: APEX GROUP From: Anter El-Azab (anter@seas.ucla.edu) Re with Lithium will can not work and this concept should be terminated. For the case of vanadium alloy on this concept should be terminated. #12;TERMINATION OF THE POROUS WALL CONCEPT Best Regards, Anter #12;

California at Los Angeles, University of

271

Nitrogen modification of highly porous carbon for improved supercapacitor performance  

E-Print Network [OSTI]

Nitrogen modification of highly porous carbon for improved supercapacitor performance Stephanie L for supercapacitor applications. Surface modification increases the amount of nitrogen by four times when compared elements in highly porous carbon used for electric double-layer supercapacitors.1 These elements modify

Cao, Guozhong

272

Diffusion with dissolution and precipitation in a porous media  

E-Print Network [OSTI]

Diffusion with dissolution and precipitation in a porous media approximation by a finite volume. Quelques tests numériques sont ensuite montrés. KEYWORDS: diffusion, dissolution­precipitation, porous­ ficiency of such disposals relies on material barriers. For such a use, cement concrete offers

Herbin, Raphaèle

273

Diffusion with dissolution and precipitation in a porous media  

E-Print Network [OSTI]

Diffusion with dissolution and precipitation in a porous media approximation by a finite volume numériques sont ensuite montrés. KEYWORDS: diffusion, dissolution-precipitation, porous media, finite volumes barriers. For such a use, cement concrete offers the advantage of having a weak porosity. However, disposal

Herbin, Raphaèle

274

MATHEMATICAL MODELING AND SIMULATION FOR FLUID FLOW IN POROUS MEDIA  

E-Print Network [OSTI]

1 MATHEMATICAL MODELING AND SIMULATION FOR FLUID FLOW IN POROUS MEDIA Ewing, Richard Texas A is to understand the complex chemical, physical, and fluid flow processes occurring in an underground porous medium with one pass through these four steps. Once a computer code has been developed which gives concrete

Ewing, Richard E.

275

Invariant measures for a stochastic porous medium equation  

E-Print Network [OSTI]

Invariant measures for a stochastic porous medium equation Giuseppe Da Prato (Scuola Normale AMS :76S05,35J25, 37L40 . 1 Introduction The porous medium equation X t = (Xm ), m N, (1 Brownian motion in H and C is a positive definite bounded operator on H of trace class. To be more concrete

Röckner, Michael

276

Stability of Miscible Displacements Across Stratified Porous Media  

SciTech Connect (OSTI)

This report studied macro-scale heterogeneity effects. Reflecting on their importance, current simulation practices of flow and displacement in porous media were invariably based on heterogeneous permeability fields. Here, it was focused on a specific aspect of such problems, namely the stability of miscible displacements in stratified porous media, where the displacement is perpendicular to the direction of stratification.

Shariati, Maryam; Yortsos, Yanis C.

2000-09-11T23:59:59.000Z

277

Combustion fronts in porous media with two layers Steve Schecter  

E-Print Network [OSTI]

Combustion fronts in porous media with two layers layer 1 layer 2 Steve Schecter North Carolina Subject: Propagation of a combustion front through a porous medium with two parallel layers having different properties. · Each layer admits a traveling combustion wave. · The layers are coupled by heat

Schecter, Stephen

278

Numerical Computation of Multiphase Flows in Porous Media  

E-Print Network [OSTI]

Preface iii Notation ix Introduction 1 1 Modeling Immiscible Fluid Flow in Porous Media 7 1.1 Porous Media legendi im Fachgebiet Informatik (Wissenschaftliches Rechnen) #12;ii #12;Preface Groundwater is a precious resource that is important for all forms of life on earth. The quality of groundwater is impaired

Bastian, Peter

279

Solid polymer electrolyte lithium batteries  

DOE Patents [OSTI]

This invention pertains to Lithium batteries using Li ion (Li[sup +]) conductive solid polymer electrolytes composed of solvates of Li salts immobilized in a solid organic polymer matrix. In particular, this invention relates to Li batteries using solid polymer electrolytes derived by immobilizing solvates formed between a Li salt and an aprotic organic solvent (or mixture of such solvents) in poly(vinyl chloride). 3 figures.

Alamgir, M.; Abraham, K.M.

1993-10-12T23:59:59.000Z

280

Solid polymer electrolyte lithium batteries  

DOE Patents [OSTI]

This invention pertains to Lithium batteries using Li ion (Li.sup.+) conductive solid polymer electrolytes composed of solvates of Li salts immobilized in a solid organic polymer matrix. In particular, this invention relates to Li batteries using solid polymer electrolytes derived by immobilizing solvates formed between a Li salt and an aprotic organic solvent (or mixture of such solvents) in poly(vinyl chloride).

Alamgir, Mohamed (Dedham, MA); Abraham, Kuzhikalail M. (Needham, MA)

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Heat exchangers comprising at least one porous member positioned within a casing  

DOE Patents [OSTI]

A heat exchanger and associated methods for sublimating solid particles therein, for conveying fluids therethrough, or both. The heat exchanger includes a chamber, and a porous member having a porous wall having pores in communication with the chamber and an interior of the porous member. A first fluid is conveyed into the porous member while a second fluid is conveyed into the porous member through the porous wall. The second fluid may form a positive flow boundary layer along the porous wall to reduce or eliminate substantial contact between the first fluid and the interior of the porous wall. The combined first and second fluids are conveyed out of the porous member. Additionally, the first fluid and the second fluid may each be conveyed into the porous member at different temperatures and may exit the porous member at substantially the same temperature.

Turner, Terry D. (Idaho Falls, ID); Wilding, Bruce M (Idaho Falls, ID)

2011-11-22T23:59:59.000Z

282

Hollow porous-wall glass microspheres for hydrogen storage  

DOE Patents [OSTI]

A porous wall hollow glass microsphere is provided having a diameter range of between 1 to 200 microns, a density of between 1.0 to 2.0 gm/cc, a porous-wall structure having wall openings defining an average pore size of between 10 to 1000 angstroms, and which contains therein a hydrogen storage material. The porous-wall structure facilitates the introduction of a hydrogen storage material into the interior of the porous wall hollow glass microsphere. In this manner, the resulting hollow glass microsphere can provide a membrane for the selective transport of hydrogen through the porous walls of the microsphere, the small pore size preventing gaseous or liquid contaminants from entering the interior of the hollow glass microsphere.

Heung, Leung K. (Aiken, SC); Schumacher, Ray F. (Aiken, SC); Wicks, George G. (Aiken, SC)

2010-02-23T23:59:59.000Z

283

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents [OSTI]

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, David K. (Golden, CO); Burrows, Richard W. (Conifer, CO)

1993-01-01T23:59:59.000Z

284

Microwave impregnation of porous materials with thermal energy storage materials  

DOE Patents [OSTI]

A method for impregnating a porous, non-metallic construction material with a solid phase-change material is described. The phase-change material in finely divided form is spread onto the surface of the porous material, after which the porous material is exposed to microwave energy for a time sufficient to melt the phase-change material. The melted material is spontaneously absorbed into the pores of the porous material. A sealing chemical may also be included with the phase-change material (or applied subsequent to the phase-change material) to seal the surface of the porous material. Fire retardant chemicals may also be included with the phase-change materials. The treated construction materials are better able to absorb thermal energy and exhibit increased heat storage capacity.

Benson, D.K.; Burrows, R.W.

1993-04-13T23:59:59.000Z

285

Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream  

DOE Patents [OSTI]

A process and system are described for simultaneously removing from a gaseous mixture, sulfur oxides by means of a solid sulfur oxide acceptor on a porous carrier, nitrogen oxides by means of ammonia gas and particulate matter by means of filtration and for the regeneration of loaded solid sulfur oxide acceptor. Finely-divided solid sulfur oxide acceptor is entrained in a gaseous mixture to deplete sulfur oxides from the gaseous mixture, the finely-divided solid sulfur oxide acceptor being dispersed on a porous carrier material having a particle size up to about 200 microns. In the process, the gaseous mixture is optionally pre-filtered to remove particulate matter and thereafter finely-divided solid sulfur oxide acceptor is injected into the gaseous mixture.

Cohen, M.R.; Gal, E.

1993-04-13T23:59:59.000Z

286

Stretched Polymers in Random Environment  

E-Print Network [OSTI]

We survey recent results and open questions on the ballistic phase of stretched polymers in both annealed and quenched random environments.

Dmitry Ioffe; Yvan Velenik

2011-03-01T23:59:59.000Z

287

Photochemical Crosslinking Reactions in Polymers.  

E-Print Network [OSTI]

??The post-synthesis modification of polymer properties has very broad applications in industry. It is employed to produce products that are impossible to directly synthesize, modify… (more)

Carbone, Nicholas

2012-01-01T23:59:59.000Z

288

RNA Isolation from Mammalian Cells Using Porous Polymer Monoliths: An Approach for  

E-Print Network [OSTI]

, Boston University, Boston, Massachusetts 02215, and Center for Manufacturing Innovation, Fraunhofer USA even after regular sterilization * Corresponding author. E-mail: asauerbudge@fraunhofer.org. Department of Mechanical Engineering, Boston University. Fraunhofer USA. § Department of Biomedical

289

Synthesis of Nanoscale Lithium-Ion Battery Cathode Materials Using a Porous Polymer Precursor Method  

E-Print Network [OSTI]

" and hydrothermal meth- ods have also been developed and used for this purpose in a number of laboratories. Each processing to produce the desired particle sizes, shapes, and crystallographic defect concentrations

Cui, Yi

290

Synthesis of catalytically active porous organic polymers from metalloporphyrin building blocks  

E-Print Network [OSTI]

incorporating either Fe or Mn(porphyrins) that have been shown to be active catalysts for both olefin attention given their potential applications, in catalysis,1 gas storage,2 and chemical separations,3 among,22 Nature avoids these problems by enveloping the heme moiety within a large protein structure, which can

291

Chemical reduction of a diimide based porous polymer for selective uptake of carbon dioxide versus methanew  

E-Print Network [OSTI]

. The presence of CO2 in natural gas significantly lowers the energy density of the gas stream and can lead (PSA) method is of particular industrial interest for its outstanding energy efficiency and low from natural gas and landfill gas streams, composed mostly of methane, is an important problem

292

Polyamine-Tethered Porous Polymer Networks for Carbon Dioxide Capture from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearch Welcome to theNews & Blog »Physics Accounts PolicyFlue

293

Sulfonate-Grafted Porous Polymer Networks for Preferential CO2 Adsorption  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest RegionatSearchScheduled System Burst Buffer Archive HomeStump|Center

294

SciTech Connect: Microfluidic devices and methods including porous polymer  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administrationcontroller systemsBi (2) Sr (2) Ca (2) CuFuture U.S. Corn

295

Highly Stable Porous Polymer Networks with Exceptionally High Gas-Uptake  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area.Portal Solar PhotovoltaicCenter for GasCapacities |

296

CO2 Capture from Air Using Porous Polymer Networks | Center for Gas  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASL Symposium: CelebratingMission Welcome

297

Carbon Dioxide Capture from Air Using Amine-Grafted Porous Polymer Networks  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation InInformationCenterResearchCASL Symposium: CelebratingMissionat| Center for Gas

298

Facile one-pot synthesis of porphyrin based porous polymer networks (PPNs)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary)morphinanInformation Desert Southwest Region service area. TheEPSCI Home It isGasERP SubmitScienceas biomimetic

299

ForPeerReview Hybrid structures of porous silicon and conjugated polymers  

E-Print Network [OSTI]

1 Introduction Developing renewable energy sources that are secured for long term supply of the 21st century [1-2]. Solar energy in general and particularly photovoltaic (PV) energy conversion- con), one needs a much thinner film for absorbing the solar energy. On the other hand, thin film

Asscher, Micha

300

Photopatterned conjugated polymer electrochromic nanofibers Arvind Kumara  

E-Print Network [OSTI]

Photopatterned conjugated polymer electrochromic nanofibers on paper Arvind Kumara , Chris Asemotaa. Electrochromic nanofibers of conducting polymer (terthiophene) have been deposited over a conventional paper in electrochromic characters. SEM images of the conducting polymer nanofibers together with the cellulose fibers

Otero, Toribio Fernández

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Porous Elasticity: Lectures on the elasticity of porous materials as an application of the theory of mixtures  

E-Print Network [OSTI]

of classical porous media models. Chapter 2 introduces the essentials of the theory of mixtures. Chapters 3,4 and 5 exploit the theory of mixtures to formulate various models of porous elastic materials. Chapter 6 is concerned with establishing connections...

Bowen, Ray M.

2014-01-22T23:59:59.000Z

302

Radiative heat transfer in porous uranium dioxide  

SciTech Connect (OSTI)

Due to low thermal conductivity and high emissivity of UO{sub 2}, it has been suggested that radiative heat transfer may play a significant role in heat transfer through pores of UO{sub 2} fuel. This possibility was computationally investigated and contribution of radiative heat transfer within pores to overall heat transport in porous UO{sub 2} quantified. A repeating unit cell was developed to model approximately a porous UO{sub 2} fuel system, and the heat transfer through unit cells representing a wide variety of fuel conditions was calculated using a finite element computer program. Conduction through solid fuel matrix as wekk as pore gas, and radiative exchange at pore surface was incorporated. A variety of pore compositions were investigated: porosity, pore size, shape and orientation, temperature, and temperature gradient. Calculations were made in which pore surface radiation was both modeled and neglected. The difference between yielding the integral contribution of radiative heat transfer mechanism to overall heat transport. Results indicate that radiative component of heat transfer within pores is small for conditions representative of light water reactor fuel, typically less than 1% of total heat transport. It is much larger, however, for conditions present in liquid metal fast breeder reactor fuel; during restructuring of this fuel type early in life, the radiative heat transfer mode was shown to contribute as much as 10-20% of total heat transport in hottest regions of fuel.

Hayes, S.L. [Texas A and M Univ., College Station, TX (United States)] [Texas A and M Univ., College Station, TX (United States)

1992-12-01T23:59:59.000Z

303

Singular Limits in Polymer Stabilized Liquid Crystals  

E-Print Network [OSTI]

We investigate equilibrium configurations for a polymer stabilized liquid crys- tal material ... eling the cross section of the liquid crystal-polymer fiber composite.

1910-31-00T23:59:59.000Z

304

Partially fluorinated cyclic ionic polymers and membranes  

DOE Patents [OSTI]

Ionic polymers are made from selected partially fluorinated dienes, in which the repeat units are cycloaliphatic. The polymers are formed into membranes.

Yang, Zhen-Yu

2013-04-09T23:59:59.000Z

305

Polymers in a Vacuum  

SciTech Connect (OSTI)

In a variety of situations, isolated polymer molecules are found in a vacuum, and here we examine their properties. Angular momentum conservation is shown to significantly alter the average size of a chain and its conservation is only broken slowly by thermal radiation. For an ideal chain, the time autocorrelation for monomer position oscillates with a period proportional to chain length. The oscillations and damping are analyzed in detail. Short-range repulsive interactions suppress oscillations and speed up relaxation, but stretched chains still show damped oscillatory correlations.

Deutsch, J. M. [Department of Physics, University of California, Santa Cruz, California 95064 (United States)

2007-12-07T23:59:59.000Z

306

A Semi-Empirical Model for Porous Media Heat Exchanger Design Richard A. Wirtz1  

E-Print Network [OSTI]

and the effectiveness of the porous wall are always maximum when it is operated with the number of transfer units of the porous matrix greater than two (ntu 2). Furthermore, if the porous matrix is composed of a packed bed matrix is minimum when ntu 2. This suggest that for many design requirements, the porous media exchanger

Wirtz, Richard A.

307

Macrodispersivity tensor for nonreactive solute transport in isotropic and anisotropic fractal porous media  

E-Print Network [OSTI]

porous media: Analytical solutions Hongbin Zhan1 and Stephen W. Wheatcraft Hydrology/Hydrogeology Program

Zhan, Hongbin

308

Vacuum flash evaporated polymer composites  

DOE Patents [OSTI]

A method for fabrication of polymer composite layers in a vacuum is disclosed. More specifically, the method of dissolving salts in a monomer solution, vacuum flash evaporating the solution, condensing the flash evaporated solution as a liquid film, and forming the condensed liquid film into a polymer composite layer on a substrate is disclosed.

Affinito, J.D.; Gross, M.E.

1997-10-28T23:59:59.000Z

309

Polymer formulations for gettering hydrogen  

DOE Patents [OSTI]

A novel method for preparing a hydrogenation composition comprising organic polymer molecules having carbon--carbon double bonds, for removing hydrogen from the atmosphere within enclosed spaces and particularly from atmospheres within enclosed spaces that contain air, water vapor, oxygen, carbon dioxide or ammonia. The organic polymers molecules containing carbon--carbon double bonds throughout their structures, preferably polybutadiene, polyisoprene and derivatives thereof, intimately mixed with an insoluble noble metal catalyst composition. High molecular weight polymers may be added to the organic polymer/catalyst mixture in order to improve their high temperature performance. The hydrogenation composition is prepared by dispersing the polymers in a suitable solvent, forming thereby a solution suspension, flash-freezing droplets of the solution in a liquid cryogen, freeze-drying the frozen droplets to remove frozen solvent incorporated in the droplets, and recovering the dried powder thus formed.

Shepodd, Timothy J. (330 Thrasher Ave., Livermore, CA 94550); Even, Jr., William R. (4254 Drake Way, Livermore, CA 94550)

2000-01-01T23:59:59.000Z

310

Oilfield flooding polymer  

DOE Patents [OSTI]

A monomer, polymers containing the monomer, and the use of the polymer in oilfield flooding is disclosed. The subject monomer is represented by the general formula: ##STR1## wherein: n is an integer from 0 to about 4; m is an integer from 0 to about 6; a is an integer equal to at least 1 except where m is equal to 0, a must equal 0 and where m is equal to 1, a must equal 0 or 1; p is an integer from 2 to about 10; b is an integer equal to at least 1 and is of sufficient magnitude that the ratio b/p is at least 0.2; and q is an integer from 0 to 2. The number of hydroxy groups in the monomer is believed to be critical, and therefore the sum of (a+b) divided by the sum (m+p) should be at least 0.2. The moieties linked to the acrylic nitrogen can be joined to provide a ringed structure.

Martin, Fred D. (Socorro, NM); Hatch, Melvin J. (Socorro, NM); Shepitka, Joel S. (Socorro, NM); Donaruma, Lorraine G. (Syosset, NY)

1986-01-01T23:59:59.000Z

311

Towards improved methods for determining porous media multiphase flow functions  

E-Print Network [OSTI]

to the empirical relation by using the three-dimensional saturation and relaxation data. 7 CHAPTER II ESTIMATION OF POROUS MEDIA FLOW FUNCTIONS Multiphase flow functions are required to simulate the flow of multiple fluid phases through porous media....3) Snw + Sw = 1: (2.4) Together with boundary and initial conditions, Eqs. (2.1)-(2.4) provide a mathemat- ical model of three-dimensional, two-phase fluid flow in porous media. Several properties have to be specified in the above model. The densities...

Xue, Song

2004-09-30T23:59:59.000Z

312

Rapid process for producing transparent, monolithic porous glass  

DOE Patents [OSTI]

A process for making transparent porous glass monoliths from gels. The glass is produced much faster and in much larger sizes than present technology for making porous glass. The process reduces the cost of making large porous glass monoliths because: 1) the process does not require solvent exchange nor additives to the gel to increase the drying rates, 2) only moderate temperatures and pressures are used so relatively inexpensive equipment is needed, an 3) net-shape glass monoliths are possible using this process. The process depends on the use of temperature to control the partial pressure of the gel solvent in a closed vessel, resulting in controlled shrinking during drying.

Coronado, Paul R. (Livermore, CA)

2006-02-14T23:59:59.000Z

313

Theory of Sound Propagation in Superfluid Solutions Filled Porous Media  

E-Print Network [OSTI]

A theory of the propagation of acoustic waves in a porous medium filled with superfluid solution is developed. The elastic coefficients in the system of equations are expressed in terms of physically measurable quantities. The equations obtained describe all volume modes that can propagate in a porous medium saturated with superfluid solution. Finally, derived equations are applied to the most important particular case when the normal fluid component is locked inside a highly porous media (aerogel) by viscous forces and the velocities of two longitudinal sound modes are calculated.

Sh. E. Kekutia; N. D. Chkhaidze

2005-02-10T23:59:59.000Z

314

The porous atmosphere of eta Carinae  

E-Print Network [OSTI]

We analyze the wind generated by the great 20 year long super-Eddington outburst of eta-Carinae. We show that using classical stellar atmospheres and winds theory, it is impossible to construct a consistent wind model in which a sufficiently small amount of mass, like the one observed, is shed. One expects the super-Eddington luminosity to drive a thick wind with a mass loss rate substantially higher than the observed one. The easiest way to resolve the inconsistency is if we alleviate the implicit notion that atmospheres are homogeneous. An inhomogeneous atmosphere, or "porous", allows more radiation to escape while exerting a smaller average force. Consequently, such an atmosphere yields a considerably lower mass loss rate for the same total luminosity. Moreover, all the applications of the Eddington Luminosity as a strict luminosity limit should be revised, or at least reanalyzed carefully.

Nir J. Shaviv

2000-02-09T23:59:59.000Z

315

Fabricating solid carbon porous electrodes from powders  

DOE Patents [OSTI]

Fabrication of conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive dionization, and waste treatment. Electrodes fabricated from low surface area (<50 m.sup.2 /gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon compositives with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to be high surface area carbons, fuel cell electrodes can be produced.

Kaschmitter, James L. (Pleasanton, CA); Tran, Tri D. (Livermore, CA); Feikert, John H. (Livermore, CA); Mayer, Steven T. (San Leandro, CA)

1997-01-01T23:59:59.000Z

316

Fabricating solid carbon porous electrodes from powders  

DOE Patents [OSTI]

Fabrication is described for conductive solid porous carbon electrodes for use in batteries, double layer capacitors, fuel cells, capacitive deionization, and waste treatment. Electrodes fabricated from low surface area (<50 m{sup 2}/gm) graphite and cokes exhibit excellent reversible lithium intercalation characteristics, making them ideal for use as anodes in high voltage lithium insertion (lithium-ion) batteries. Electrodes having a higher surface area, fabricated from powdered carbon blacks, such as carbon aerogel powder, carbon aerogel microspheres, activated carbons, etc. yield high conductivity carbon composites with excellent double layer capacity, and can be used in double layer capacitors, or for capacitive deionization and/or waste treatment of liquid streams. By adding metallic catalysts to high surface area carbons, fuel cell electrodes can be produced. 1 fig.

Kaschmitter, J.L.; Tran, T.D.; Feikert, J.H.; Mayer, S.T.

1997-06-10T23:59:59.000Z

317

SULFUR POLYMER ENCAPSULATION.  

SciTech Connect (OSTI)

Sulfur polymer cement (SPC) is a thermoplastic polymer consisting of 95 wt% elemental sulfur and 5 wt% organic modifiers to enhance long-term durability. SPC was originally developed by the U.S. Bureau of Mines as an alternative to hydraulic cement for construction applications. Previous attempts to use elemental sulfur as a construction material in the chemical industry failed due to premature degradation. These failures were caused by the internal stresses that result from changes in crystalline structure upon cooling of the material. By reacting elemental sulfur with organic polymers, the Bureau of Mines developed a product that successfully suppresses the solid phase transition and significantly improves the stability of the product. SPC, originally named modified sulfur cement, is produced from readily available, inexpensive waste sulfur derived from desulfurization of both flue gases and petroleum. The commercial production of SPC is licensed in the United States by Martin Resources (Odessa, Texas) and is marketed under the trade name Chement 2000. It is sold in granular form and is relatively inexpensive ({approx}$0.10 to 0.12/lb). Application of SPC for the treatment of radioactive, hazardous, and mixed wastes was initially developed and patented by Brookhaven National Laboratory (BNL) in the mid-1980s (Kalb and Colombo, 1985; Colombo et al., 1997). The process was subsequently investigated by the Commission of the European Communities (Van Dalen and Rijpkema, 1989), Idaho National Engineering Laboratory (Darnell, 1991), and Oak Ridge National Laboratory (Mattus and Mattus, 1994). SPC has been used primarily in microencapsulation applications but can also be used for macroencapsulation of waste. SPC microencapsulation has been demonstrated to be an effective treatment for a wide variety of wastes, including incinerator hearth and fly ash; aqueous concentrates such as sulfates, borates, and chlorides; blowdown solutions; soils; and sludges. It is not recommended for treatment of wastes containing high concentrations of nitrates because of potentially dangerous reactions between sulfur, nitrate, and trace quantities of organics. Recently, the process has been adapted for the treatment of liquid elemental mercury and mercury contaminated soil and debris.

KALB, P.

2001-08-22T23:59:59.000Z

318

Tubular screen electrical connection support for solid oxide fuel cells  

DOE Patents [OSTI]

A solid oxide fuel assembly is made of fuel cells (16, 16', 18, 24, 24', 26), each having an outer interconnection layer (36) and an outer electrode (28), which are disposed next to each other with rolled, porous, hollow, electrically conducting metal mesh conductors (20, 20') between the fuel cells, connecting the fuel cells at least in series along columns (15, 15') and where there are no metal felt connections between any fuel cells.

Tomlins, Gregory W. (Pittsburgh, PA); Jaszcar, Michael P. (Murrysville, PA)

2002-01-01T23:59:59.000Z

319

Carbon nanotube-polymer composite actuators  

DOE Patents [OSTI]

The present invention discloses a carbon nanotube (SWNT)-polymer composite actuator and method to make such actuator. A series of uniform composites was prepared by dispersing purified single wall nanotubes with varying weight percents into a polymer matrix, followed by solution casting. The resulting nanotube-polymer composite was then successfully used to form a nanotube polymer actuator.

Gennett, Thomas (Denver, CO); Raffaelle, Ryne P. (Honeoye Falls, NY); Landi, Brian J. (Rochester, NY); Heben, Michael J. (Denver, CO)

2008-04-22T23:59:59.000Z

320

The workshop on conductive polymers: Final report  

SciTech Connect (OSTI)

Reports are made by groups on: polyacetylene, polyphenylene, polyaniline, and related systems; molecular, crystallographic, and defect structures in conducting polymers; heterocyclic polymers; synthesis of new and improved conducting polymers; future applications possibilities for conducting polymers; and challenges for improved understanding of properties. (DLC)

Not Available

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions  

DOE Patents [OSTI]

A biofilter is described for reducing concentrations of gaseous nitrogen oxides in a polluted gas comprises a porous organic filter bed medium disposed in a housing, the filter bed medium including a mixed culture of naturally occurring denitrifying bacteria for converting the nitrogen oxides to nitrogen gas, carbon dioxide, and water. A method is described of reducing concentrations of nitrogen oxides in polluted gas comprises conducting the polluted gas through the biofilter so that the denitrifying bacteria can degrade the nitrogen oxides. A preferred filter medium is wood compost, however composts of other organic materials are functional. Regulation of pH, moisture content, exogenous carbon sources, and temperature are described. 6 figs.

Apel, W.A.

1998-08-18T23:59:59.000Z

322

Biofilter for removal of nitrogen oxides from contaminated gases under aerobic conditions  

DOE Patents [OSTI]

A biofilter for reducing concentrations of gaseous nitrogen oxides in a polluted gas comprises a porous organic filter bed medium disposed in a housing, the filter bed medium including a mixed culture of naturally occurring denitrifying bacteria for converting the nitrogen oxides to nitrogen gas, carbon dioxide, and water. A method of reducing concentrations of nitrogen oxides in polluted gas comprises conducting the polluted gas through the biofilter so that the denitrifying bacteria can degrade the nitrogen oxides. A preferred filter medium is wood compost, however composts of other organic materials are functional. Regulation of pH, moisture content, exogenous carbon sources, and temperature are described.

Apel, William A. (Idaho Falls, ID)

1998-01-01T23:59:59.000Z

323

Highly efficient photoinduced desorption of N{sub 2}O and CO from porous silicon  

SciTech Connect (OSTI)

Photoinduced desorption (PID) of N{sub 2}O and CO from porous silicon (PSi) samples is reported. Both adsorbates exhibit unusually large cross sections for PID at 193 nm, up to 10{sup -15} cm{sup 2}, 2-3 orders of magnitude larger than the literature values for similar processes on flat Si. Under this UV irradiation, N{sub 2}O molecules undergo photodissociation (a competing process leading to surface oxidation) with a cross section that is 2 orders of magnitude smaller than photodesorption. In the case of CO desorption is the exclusive photodepletion mechanism. PID efficiency decreases with increasing CO coverage suggesting PID hindrance by interactions among the desorbing CO molecules leading to re-adsorption at higher coverage. The wavelength and fluence dependence measurements exclude the possibility of laser induced thermal desorption for both adsorbates. The proposed mechanism for this phenomenon is desorption induced by hot electron transfer from the substrate to the adsorbate. Enhanced lifetime of transient negative adsorbate due to stabilization by localized holes on PSi nanotips can explain the observed abnormally large PID efficiency on top of porous silicon.

Toker, Gil; Sagi, Roey; Bar-Nachum, Shay; Asscher, Micha [Institute of Chemistry, Hebrew University of Jerusalem, Jerusalem 91904 (Israel)

2013-01-28T23:59:59.000Z

324

Porous material and process development for electrospray propulsion applications  

E-Print Network [OSTI]

Ion electrospray propulsion devices rely on the transportation of ionic liquid propellant to emission regions where ions are extracted at high velocities. One such method involves the use of porous substrates to passively ...

Arestie, Steven Mark

2014-01-01T23:59:59.000Z

325

Uncertainty quantification using multiscale methods for porous media flows  

E-Print Network [OSTI]

numerical models. When solving the flow and transport through heterogeneous porous media some type of upscaling or coarsening is needed due to scale disparity. We describe multiscale techniques used for solving the spatial component of the stochastic flow...

Dostert, Paul Francis

2009-05-15T23:59:59.000Z

326

Colloid-facilitated radionuclide transport in fractured porous rock  

E-Print Network [OSTI]

Numerical methods have been applied for the prediction of colloid-facilitated radionuclide transport through water-saturated fractured porous rock. The presence of colloids may enhance the transport of radionuclides in groundwater by reducing...

Baek, Inseok

1994-01-01T23:59:59.000Z

327

Effective hydraulic conductivity of bounded, strongly heterogeneous porous media  

E-Print Network [OSTI]

Effective hydraulic conductivity of bounded, strongly heterogeneous porous media Evangelos K of Arizona, Tucson Abstract. We develop analytical expressions for the effective hydraulic conductivity Ke boundaries. The log hydraulic conductivity Y forms a Gaussian, statistically homogeneous and anisotropic

Tartakovsky, Daniel M.

328

Ultrasonic measurement of porous medium in an aqueous environment  

E-Print Network [OSTI]

The use of a medical ultrasonic scanning device was studied as a measuring tool for determining the physical characteristics of soft porous media in an turbid aqueous environment. Three different sponge types were used as the soft objects. A method...

Daubon, Jose C

1995-01-01T23:59:59.000Z

329

Gasification and combustion modeling for porous char particles  

E-Print Network [OSTI]

Gasification and combustion of porous char particles occurs in many industrial applications. Reactor-scale outputs of importance depend critically on processes that occur at the particle-scale. Because char particles often ...

Singer, Simcha Lev

2012-01-01T23:59:59.000Z

330

Overlimiting Current and Shock Electrodialysis in Porous Media  

E-Print Network [OSTI]

Most electrochemical processes, such as electrodialysis, are limited by diffusion, but in porous media, surface conduction and electroosmotic flow also contribute to ionic flux. In this article, we report experimental ...

Deng, Daosheng

331

Functionalization/passivation of porous graphitic carbon with...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

data are also presented. Citation: Jensen DS, V Gupta, RE Olsen, AT Miller, RC Davis, D Ess, Z Zhu, MA Vail, A Dadson, and MR Linford.2011."Functionalizationpassivation of porous...

332

Carbide-derived carbons - From porous networks to nanotubes and...  

Office of Scientific and Technical Information (OSTI)

Carbide-derived carbons - From porous networks to nanotubes and graphene Re-direct Destination: Carbide-derived carbons (CDCs) are a large family of carbon materials derived from...

333

Field emission study of cobalt ion implanted porous silicon  

E-Print Network [OSTI]

Porous silicon has become potentially important material for microelectronics applications. By using low energy implantation and energy scan implantation, a stable silicide with good electrical conductivity can be formed, and can be used...

Liu, Hongbiao

1995-01-01T23:59:59.000Z

334

Simulation of filtration for suspension transport in porous media  

E-Print Network [OSTI]

This thesis describes the development and application of a novel method for analyzing the filtration of particles transported through a granular porous medium. The proposed analysis considers the deposition of particles ...

Kim, Yun Sung, 1974-

2005-01-01T23:59:59.000Z

335

The evolution of miscible gravity currents in horizontal porous layers  

E-Print Network [OSTI]

Gravity currents of miscible fluids in porous media are important to understand because they occur in important engineering projects, such as enhanced oil recovery and geologic CO[subscript 2] sequestration. These flows ...

Szulczewski, Michael Lawrence

336

Vortex development behind a finite porous obstruction in a channel  

E-Print Network [OSTI]

This experimental study describes the turbulent wake behind a two-dimensional porous obstruction, consisting of a circular array of cylinders. The cylinders extend from the channel bed through the water surface, mimicking ...

Zong, Lijun

337

Experimental design for study of nucleate boiling in porous structures  

E-Print Network [OSTI]

The superheat required to initiate nucleate boiling inside porous wicks is not well understood in practice. This thesis reports the design of an experimental setup for investigating the onset of vapor nucleation in sintered ...

Kelley, Mitchell Joseph

2011-01-01T23:59:59.000Z

338

Thermodynamics of tubelike flexible polymers  

E-Print Network [OSTI]

In this work we present the general phase behavior of short tubelike flexible polymers. The geometric thickness constraint is implemented through the concept of the global radius of curvature. We use sophisticated Monte Carlo sampling methods to simulate small bead-stick polymer models with Lennard-Jones interaction among non-bonded monomers. We analyze energetic fluctuations and structural quantities to classify conformational pseudophases. We find that the tube thickness influences the thermodynamic behavior of simple tubelike polymers significantly, i.e., for given temperature, the formation of secondary structures strongly depends on the tube thickness.

Thomas Vogel; Thomas Neuhaus; Michael Bachmann; Wolfhard Janke

2009-07-17T23:59:59.000Z

339

Nanostructured tungsten carbide catalysts for polymer electrolyte fuel cells X. G. Yanga  

E-Print Network [OSTI]

a possibility of replacing precious metal anode catalysts with transition metal compounds for hydrogen oxidation density of states of tungsten carbides resembles that of noble metal platinum.4,5 FundamentalNanostructured tungsten carbide catalysts for polymer electrolyte fuel cells X. G. Yanga and C. Y

340

Porous silicon membranes as ultrafiltration devices: a feasibility study  

E-Print Network [OSTI]

and several liquids, and the experimental results are compared to model predictions. Hexane, ethanol, and ethanol-water mixtures permeated the porous silicon membranes as liquids at pressure differentials greater than 100 psig. The membranes exhibited much... % HNOs and 4 parts water. However, the porous silicon layers became fragile during the etching and were easy to break. Experimental results for flow tests on selected samples after chemical etching are shown in the next section. 14 GAS FLOW TESTING...

Hong, Xiangrong

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Porous solid ion exchange wafer for immobilizing biomolecules  

DOE Patents [OSTI]

A porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer. Also disclosed is a porous solid ion exchange wafer having a combination of a biomolecule capture-resin and an ion-exchange resin forming a charged capture resin within said wafer containing a biomolecule with a tag. A separate bioreactor is also disclosed incorporating the wafer described above.

Arora, Michelle B. (Woodridge, IL); Hestekin, Jamie A. (Morton Grove, IL); Lin, YuPo J. (Naperville, IL); St. Martin, Edward J. (Libertyville, IL); Snyder, Seth W. (Lincolnwood, IL)

2007-12-11T23:59:59.000Z

342

Nuclear magnetic resonance study of methane adsorbed on porous silicon  

E-Print Network [OSTI]

NUCLEAR MAGNETIC RESONANCE STUDY OF METHANE ADSORBED ON POROUS SILICON A Thesis by FENG I I Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... May 1992 Major Subject: Physics NUCLEAR MAGNETIC RESONANCE STUDY OF METHANE ADSORBED ON POROUS SILICON A Thesis by FENG LI Approved as to style and content by: . P. Kirk (Chair of Committee) i G. Agnolet (Member) J. H. Ross, r (Member) M...

Li, Feng

1992-01-01T23:59:59.000Z

343

The study of methane adsorbed on porous silicon by NMR  

E-Print Network [OSTI]

THE STUDY OF METHANE ADSORBED ON POROUS SILICON BY NMR A Thesis by ADAM KAZIMIERZ CZERMAK Submitted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August 1986... Major Subject: Physics THE STUDY OF METHANE ADSORBED ON POROUS SILICON BY NMR A Thesis by ADAM KAZIMIERZ CZERMAK Approved as to style and content by: e Wile . Kirk (Chairman of Committee) J eevak M. Par pi a (Member) Randall L. Geiger...

Czermak, Adam Kazimierz

1986-01-01T23:59:59.000Z

344

Two dimensional properties of methane adsorbed on porous silicon  

E-Print Network [OSTI]

TWO DIMENSIONAL PROPERTIES OF METHANE ADSORBED ON POROUS SILICON A Thesis by RICHARD FRANKLIN TENNIS Submitted to the Office of Graduate Studies of Texas ASM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1989 Major Subject: Physics TWO DIMENSIONAL PROPERTIES OF METHANE ADSORBED ON POROUS SILICON A Thesis by RICHARD FRANKLIN TENNIS Approved as to style and content by: P. Kirk (C ir of Committee) Glenn olet (M er) Da J. Ernst...

Tennis, Richard Franklin

1989-01-01T23:59:59.000Z

345

Planar ceramic membrane assembly and oxidation reactor system  

DOE Patents [OSTI]

Planar ceramic membrane assembly comprising a dense layer of mixed-conducting multi-component metal oxide material, wherein the dense layer has a first side and a second side, a porous layer of mixed-conducting multi-component metal oxide material in contact with the first side of the dense layer, and a ceramic channeled support layer in contact with the second side of the dense layer. The planar ceramic membrane assembly can be used in a ceramic wafer assembly comprising a planar ceramic channeled support layer having a first side and a second side; a first dense layer of mixed-conducting multi-component metal oxide material having an inner side and an outer side, wherein the inner side is in contact with the first side of the ceramic channeled support layer; a first outer support layer comprising porous mixed-conducting multi-component metal oxide material and having an inner side and an outer side, wherein the inner side is in contact with the outer side of the first dense layer; a second dense layer of mixed-conducting multi-component metal oxide material having an inner side and an outer side, wherein the inner side is in contact with the second side of the ceramic channeled layer; and a second outer support layer comprising porous mixed-conducting multi-component metal oxide material and having an inner side and an outer side, wherein the inner side is in contact with the outer side of the second dense layer.

Carolan, Michael Francis (Allentown, PA); Dyer, legal representative, Kathryn Beverly (Allentown, PA); Wilson, Merrill Anderson (West Jordan, UT); Ohm, Ted R. (Alliance, OH); Kneidel, Kurt E. (Alliance, OH); Peterson, David (Uniontown, OH); Chen, Christopher M. (Allentown, PA); Rackers, Keith Gerard (Louisville, OH); Dyer, deceased, Paul Nigel (Allentown, PA)

2007-10-09T23:59:59.000Z

346

Planar ceramic membrane assembly and oxidation reactor system  

DOE Patents [OSTI]

Planar ceramic membrane assembly comprising a dense layer of mixed-conducting multi-component metal oxide material, wherein the dense layer has a first side and a second side, a porous layer of mixed-conducting multi-component metal oxide material in contact with the first side of the dense layer, and a ceramic channeled support layer in contact with the second side of the dense layer. The planar ceramic membrane assembly can be used in a ceramic wafer assembly comprising a planar ceramic channeled support layer having a first side and a second side; a first dense layer of mixed-conducting multi-component metal oxide material having an inner side and an outer side, wherein the inner side is in contact with the first side of the ceramic channeled support layer; a first outer support layer comprising porous mixed-conducting multi-component metal oxide material and having an inner side and an outer side, wherein the inner side is in contact with the outer side of the first dense layer; a second dense layer of mixed-conducting multi-component metal oxide material having an inner side and an outer side, wherein the inner side is in contact with the second side of the ceramic channeled layer; and a second outer support layer comprising porous mixed-conducting multi-component metal oxide material and having an inner side and an outer side, wherein the inner side is in contact with the outer side of the second dense layer.

Carolan, Michael Francis (Allentown, PA); Dyer, legal representative, Kathryn Beverly (Allentown, PA); Wilson, Merrill Anderson (West Jordan, UT); Ohrn, Ted R. (Alliance, OH); Kneidel, Kurt E. (Alliance, OH); Peterson, David (Uniontown, OH); Chen, Christopher M. (Allentown, PA); Rackers, Keith Gerard (Louisville, OH); Dyer, Paul Nigel (Allentown, PA)

2009-04-07T23:59:59.000Z

347

Macrostructure-dependent photocatalytic property of high-surface-area porous titania films  

SciTech Connect (OSTI)

Porous titania films with different macrostructures were prepared with precise control of condensation degree and density of the oxide frameworks in the presence of spherical aggregates of polystyrene-block-poly(oxyethylene) (PS-b-PEO) diblock copolymer. Following detailed explanation of the formation mechanisms of three (reticular, spherical, and large spherical) macrostructures by the colloidal PS-b-PEO templating, structural variation of the titania frameworks during calcination were investigated by X-ray diffraction and X-ray photoelectron spectroscopy. Then, photocatalytic performance of the macroporous titania films was evaluated through simple degradation experiments of methylene blue under an UV irradiation. Consequently, absolute surface area of the film and crystallinity of the titania frameworks were important for understanding the photocatalytic performance, but the catalytic performance can be improved further by the macrostructural design that controls diffusivity of the targeted molecules inside the film and their accessibility to active sites.

Kimura, T., E-mail: t-kimura@aist.go.jp [Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama-ku, Nagoya 463-8560 (Japan)

2014-11-01T23:59:59.000Z

348

Foam Transport in Porous Media - A Review  

SciTech Connect (OSTI)

Amendment solutions with or without surfactants have been used to remove contaminants from soil. However, it has drawbacks such that the amendment solution often mobilizes the plume, and its movement is controlled by gravity and preferential flow paths. Foam is an emulsion-like, two-phase system in which gas cells are dispersed in a liquid and separated by thin liquid films called lamellae. Potential advantages of using foams in sub-surface remediation include providing better control on the volume of fluids injected, uniformity of contact, and the ability to contain the migration of contaminant laden liquids. It is expected that foam can serve as a carrier of amendments for vadose zone remediation, e.g., at the Hanford Site. As part of the U.S. Department of Energy’s EM-20 program, a numerical simulation capability will be added to the Subsurface Transport Over Multiple Phases (STOMP) flow simulator. The primary purpose of this document is to review the modeling approaches of foam transport in porous media. However, as an aid to understanding the simulation approaches, some experiments under unsaturated conditions and the processes of foam transport are also reviewed. Foam may be formed when the surfactant concentration is above the critical micelle concentration. There are two main types of foams – the ball foam (microfoam) and the polyhedral foam. The characteristics of bulk foam are described by the properties such as foam quality, texture, stability, density, surface tension, disjoining pressure, etc. Foam has been used to flush contaminants such as metals, organics, and nonaqueous phase liquids from unsaturated soil. Ball foam, or colloidal gas aphrons, reportedly have been used for soil flushing in contaminated site remediation and was found to be more efficient than surfactant solutions on the basis of weight of contaminant removed per gram of surfactant. Experiments also indicate that the polyhedral foam can be used to enhance soil remediation. The transport of foam in porous media is complicated in that the number of lamellae present governs flow characteristics such as viscosity, relative permeability, fluid distribution, and interactions between fluids. Hence, foam is a non-Newtonian fluid. During transport, foam destruction and formation occur. The net result of the two processes determines the foam texture (i.e., bubble density). Some of the foam may be trapped during transport. According to the impacts of the aqueous and gas flow rates, foam flow generally has two regimes – weak and strong foam. There is also a minimum pressure gradient to initiate foam flow and a critical capillary for foam to be sustained. Similar to other fluids, the transport of foam is described by Darcy’s law with the exception that the foam viscosity is variable. Three major approaches to modeling foam transport in porous media are the empirical, semi-empirical, and mechanistic methods. Mechanistic approaches can be complete in principal but may be difficult to obtain reliable parameters, whereas empirical and semi-empirical approaches can be limited by the detail used to describe foam rheology and mobility. Mechanistic approaches include the bubble population-balance model, the network/percolation theory, the catastrophe theory, and the filtration theory. Among these methods, all were developed for modeling polyhedral foam with the exception that the method based on the filtration theory was for the ball foam (microfoam).

Zhang, Z. F.; Freedman, Vicky L.; Zhong, Lirong

2009-11-11T23:59:59.000Z

349

Hydrogen separation membrane on a porous substrate  

DOE Patents [OSTI]

A hydrogen permeable membrane is disclosed. The membrane is prepared by forming a mixture of metal oxide powder and ceramic oxide powder and a pore former into an article. The article is dried at elevated temperatures and then sintered in a reducing atmosphere to provide a dense hydrogen permeable portion near the surface of the sintered mixture. The dense hydrogen permeable portion has a higher initial concentration of metal than the remainder of the sintered mixture and is present in the range of from about 20 to about 80 percent by volume of the dense hydrogen permeable portion.

Song, Sun-Ju (Orland Park, IL); Lee, Tae H. (Naperville, IL); Chen, Ling (Woodridge, IL); Dorris, Stephen E. (LaGrange Park, IL); Balachandran, Uthamalingam (Hinsdale, IL)

2011-06-14T23:59:59.000Z

350

Oxidation of Polymer-derived SiAICN Ceramics. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 - September 2006 The 2002Optics GroupPlanning Workshop Overview

351

Characterization of macro-length conducting polymers and the development of a conducting polymer rotary motor  

E-Print Network [OSTI]

Conducting polymers are a subset of materials within the electroactive polymer class that exhibit active mechanical deformations. These deformations induce stresses and strains that allow for conducting polymers to be used ...

Schmid, Bryan D. (Bryan David), 1981-

2005-01-01T23:59:59.000Z

352

High elastic modulus polymer electrolytes  

DOE Patents [OSTI]

A polymer that combines high ionic conductivity with the structural properties required for Li electrode stability is useful as a solid phase electrolyte for high energy density, high cycle life batteries that do not suffer from failures due to side reactions and dendrite growth on the Li electrodes, and other potential applications. The polymer electrolyte includes a linear block copolymer having a conductive linear polymer block with a molecular weight of at least 5000 Daltons, a structural linear polymer block with an elastic modulus in excess of 1.times.10.sup.7 Pa and an ionic conductivity of at least 1.times.10.sup.-5 Scm.sup.-1. The electrolyte is made under dry conditions to achieve the noted characteristics.

Balsara, Nitash Pervez; Singh, Mohit; Eitouni, Hany Basam; Gomez, Enrique Daniel

2013-10-22T23:59:59.000Z

353

Polymer electronic devices and materials.  

SciTech Connect (OSTI)

Polymer electronic devices and materials have vast potential for future microsystems and could have many advantages over conventional inorganic semiconductor based systems, including ease of manufacturing, cost, weight, flexibility, and the ability to integrate a wide variety of functions on a single platform. Starting materials and substrates are relatively inexpensive and amenable to mass manufacturing methods. This project attempted to plant the seeds for a new core competency in polymer electronics at Sandia National Laboratories. As part of this effort a wide variety of polymer components and devices, ranging from simple resistors to infrared sensitive devices, were fabricated and characterized. Ink jet printing capabilities were established. In addition to promising results on prototype devices the project highlighted the directions where future investments must be made to establish a viable polymer electronics competency.

Schubert, William Kent; Baca, Paul Martin; Dirk, Shawn M.; Anderson, G. Ronald; Wheeler, David Roger

2006-01-01T23:59:59.000Z

354

Continuous production of conducting polymer  

E-Print Network [OSTI]

A device to continuously produce polypyrrole was designed, manufactured, and tested. Polypyrrole is a conducting polymer which has potential artificial muscle applications. The objective of continuous production was to ...

Gaige, Terry A. (Terry Alden), 1981-

2004-01-01T23:59:59.000Z

355

Layered plasma polymer composite membranes  

DOE Patents [OSTI]

Layered plasma polymer composite fluid separation membranes are disclosed, which comprise alternating selective and permeable layers for a total of at least 2n layers, where n is [>=]2 and is the number of selective layers. 2 figs.

Babcock, W.C.

1994-10-11T23:59:59.000Z

356

Polymer Bose--Einstein Condensates  

E-Print Network [OSTI]

In this work we analyze a non--interacting one dimensional polymer Bose--Einstein condensate in an harmonic trap within the semiclassical approximation. We use an effective Hamiltonian coming from the polymer quantization that arises in loop quantum gravity. We calculate the number of particles in order to obtain the critical temperature. The Bose--Einstein functions are replaced by series, whose high order terms are related to powers of the polymer length. It is shown that the condensation temperature presents a shift respect to the standard case, for small values of the polymer scale. In typical experimental conditions, it is possible to establish a bound for $\\lambda^{2}$ up to $ \\lesssim 10 ^{-16}$m$^2$. To improve this bound we should decrease the frequency of the trap and also decrease the number of particles.

E. Castellanos; G. Chacon-Acosta

2013-01-22T23:59:59.000Z

357

Conducting polymer actuators : temperature effects  

E-Print Network [OSTI]

In order to utilize conducting polymer actuators as a viable engineering solution, it is necessary to produce usable levels of force with a reasonable bandwidth. Polypyrrole actuated at temperatures as high as 100 °C ...

Del Zio, Michael R. (Michael Robert), 1982-

2006-01-01T23:59:59.000Z

358

Reduction of iron-oxide-carbon composites: part I. Estimation of the rate constants  

SciTech Connect (OSTI)

A new ironmaking concept using iron-oxide-carbon composite pellets has been proposed, which involves the combination of a rotary hearth furnace (RHF) and an iron bath smelter. This part of the research focuses on studying the two primary chemical kinetic steps. Efforts have been made to experimentally measure the kinetics of the carbon gasification by CO{sub 2} and wustite reduction by CO by isolating them from the influence of heat- and mass-transport steps. A combined reaction model was used to interpret the experimental data and determine the rate constants. Results showed that the reduction is likely to be influenced by the chemical kinetics of both carbon oxidation and wustite reduction at the temperatures of interest. Devolatilized wood-charcoal was observed to be a far more reactive form of carbon in comparison to coal-char. Sintering of the iron-oxide at the high temperatures of interest was found to exert a considerable influence on the reactivity of wustite by virtue of altering the internal pore surface area available for the reaction. Sintering was found to be predominant for highly porous oxides and less of an influence on the denser ores. It was found using an indirect measurement technique that the rate constants for wustite reduction were higher for the porous iron-oxide than dense hematite ore at higher temperatures (> 1423 K). Such an indirect mode of measurement was used to minimize the influence of sintering of the porous oxide at these temperatures.

Halder, S.; Fruehan, R.J. [Praxair Inc., Tonawanda, NY (United States). Technological Center

2008-12-15T23:59:59.000Z

359

High cation transport polymer electrolyte  

DOE Patents [OSTI]

A solid state ion conducting electrolyte and a battery incorporating same. The electrolyte includes a polymer matrix with an alkali metal salt dissolved therein, the salt having an anion with a long or branched chain having not less than 5 carbon or silicon atoms therein. The polymer is preferably a polyether and the salt anion is preferably an alkyl or silyl moiety of from 5 to about 150 carbon/silicon atoms.

Gerald, II, Rex E. (Brookfield, IL); Rathke, Jerome W. (Homer Glen, IL); Klingler, Robert J. (Westmont, IL)

2007-06-05T23:59:59.000Z

360

Vadose Zone Soil Moisture Wicking Using Super Absorbent Polymers...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Vadose Zone Soil Moisture Wicking Using Super Absorbent Polymers. Vadose Zone Soil Moisture Wicking Using Super Absorbent Polymers. Abstract: Super-absorbent polymers (SAPs) have...

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

High Temperature Polymer Membrane Development at Argonne National...  

Broader source: Energy.gov (indexed) [DOE]

Polymer Membrane Development at Argonne National Laboratory High Temperature Polymer Membrane Development at Argonne National Laboratory Summary of ANL's high temperature polymer...

362

Development of Bioinspired Mn4O4-Cubane Water Oxidation Catalysts: Lessons from Photosynthesis  

E-Print Network [OSTI]

efficient system that uses solar energy to oxidize water is the photosystem II water-oxidizing complex (PSII, Victoria 3800, Australia, § Department of Chemistry, Princeton University, Princeton, New Jersey 08540, Intelligent Polymer Research Institute, University of Wollongong, Wollongong, New South Wales 2522, Australia

Lawson, Catherine L.

363

Instructions for use Role of Cerium Oxide in the Enhancement of Activity for the Oxygen  

E-Print Network [OSTI]

activity for various fuel cell reactions, such as the hydrogen oxidation reaction (HOR),4 oxygen reduction. Recently, CeOx has been also utilized as a cocatalyst with Pt catalyst for ORR in PEM fuel cells.17 at the Pt oxide formation potential. INTRODUCTION Fuel cells, especially polymer electrolyte membrane (PEM

Tsunogai, Urumu

364

Novel oxide-oxide fiber reinforced hot gas filter development  

SciTech Connect (OSTI)

The objective of this program is to fabricate and test oxide fiber reinforced composite hot gas filter elements for advanced power generation systems. The level of mechanical durability exhibited by the currently available filters in field tests indicates that more rugged filters are required to meet the demands of large power generation systems. Furthermore, long term corrosion resistance of currently available filters has yet to be demonstrated in PFBC systems. The essential requirements of a composite material designed to meet the program objective for a toughened hot gas filter include the following: Stable continuous fiber; rigid porous matrix; engineered fiber-matrix interface; and cost effectiveness. Based on properties, availability, and cost, Mitsui`s ALMAX alumina fiber and 3M`s NEXTEL 610 alumina fiber were selected as the oxide reinforcement fibers. In order to meet the economic goals of the program it is essential that the cost and amount of continuous fiber be minimized. A four axis filament winder will be used to fabricate filter Preforms in a variety of fiber architectures. Carbon was used as the initial fiber coating because it was known to be resistant to the Processing chemicals. The coating was produced by pyrolysis of the resin based sizings on the continuous fibers. The matrix of the composite filter is comprised of chopped ceramic fiber. Saffil fiber was used for all compositions in this program.

Wagner, R.A.

1995-12-01T23:59:59.000Z

365

Nanostructured polymer membranes for proton conduction  

DOE Patents [OSTI]

Polymers having an improved ability to entrain water are characterized, in some embodiments, by unusual humidity-induced phase transitions. The described polymers (e.g., hydrophilically functionalized block copolymers) have a disordered state and one or more ordered states (e.g., a lamellar state, a gyroid state, etc.). In one aspect, the polymers are capable of undergoing a disorder-to-order transition while the polymer is exposed to an increasing temperature at a constant relative humidity. In some aspects the polymer includes a plurality of portions, wherein a first portion forms proton-conductive channels within the membrane and wherein the channels have a width of less than about 6 nm. The described polymers are capable of entraining and preserving water at high temperature and low humidity. Surprisingly, in some embodiments, the polymers are capable of entraining greater amounts of water with the increase of temperature. The polymers can be used in Polymer Electrolyte Membranes in fuel cells.

Balsara, Nitash Pervez; Park, Moon Jeong

2013-06-18T23:59:59.000Z

366

Unusual behavior of poly(ethylene-oxide) in aqueous mixtures.  

SciTech Connect (OSTI)

The model system of poly(ethylene-oxide) or PEO, where the changing hydrogen-bond connectivity of the water has large effect on the conformation of the polymer chain, in mixtures of water and acetonitrile, is experimentally studied. The results show the existence of a threshold water content in the system at which the 3d connectivity of the water network begins. Unusual expansion of the polymer chain, an effect larger than that observed in either of the pure solvents, is seen. Upon addition of small amounts of a monovalent salt, binding of ion to polymer takes place in pure acetonitrile solutions. Salt ions begin to co-ordinate with water molecules at the same solvent ratio as the threshold for water network formation. Ions now no longer complex to PEO; instead, hydrogen bonding of water to the polymer strongly dictates conformation in this regime.

Lal, J.; Hakem, I. F.; IPNS

2004-10-01T23:59:59.000Z

367

SUPER HARD SURFACED POLYMERS  

SciTech Connect (OSTI)

High energy ion beam surface treatments were applied to a selected group of polymers. Of the six materials in the present study, four were thermoplastics (polycarbonate, polyethylene, polyethylene terephthalate, and polystyrene) and two were thermosets (epoxy and polyimide). The particular epoxy evaluated in this work is one of the resins used in formulating fiber reinforced composites for military helicopter blades. Measures of mechanical properties of the near surface regions were obtained by nanoindentation hardness and pin on disk wear. Attempts were also made to measure erosion resistance by particle impact. All materials were hardness tested. Pristine materials were very soft, having values in the range of approximately 0.1 to 0.5 GPa. Ion beam treatment increased hardness by up to 50 times compared to untreated materials. For reference, all materials were hardened to values higher than those typical of stainless steels. Wear tests were carried out on three of the materials, PET, PI and epoxy. On the ion beam treated epoxy no wear could be detected, whereas the untreated material showed significant wear.

Mansur, Louis K [ORNL] [ORNL; Bhattacharya, R [UES, Incorporated, Dayton, OH] [UES, Incorporated, Dayton, OH; Blau, Peter Julian [ORNL] [ORNL; Clemons, Art [ORNL] [ORNL; Eberle, Cliff [ORNL] [ORNL; Evans, H B [UES, Incorporated, Dayton, OH] [UES, Incorporated, Dayton, OH; Janke, Christopher James [ORNL] [ORNL; Jolly, Brian C [ORNL] [ORNL; Lee, E H [Consultant, Milpitas, CA] [Consultant, Milpitas, CA; Leonard, Keith J [ORNL] [ORNL; Trejo, Rosa M [ORNL] [ORNL; Rivard, John D [ORNL] [ORNL

2010-01-01T23:59:59.000Z

368

Oxidation catalyst  

DOE Patents [OSTI]

The present invention generally relates to catalyst systems and methods for oxidation of carbon monoxide. The invention involves catalyst compositions which may be advantageously altered by, for example, modification of the catalyst surface to enhance catalyst performance. Catalyst systems of the present invention may be capable of performing the oxidation of carbon monoxide at relatively lower temperatures (e.g., 200 K and below) and at relatively higher reaction rates than known catalysts. Additionally, catalyst systems disclosed herein may be substantially lower in cost than current commercial catalysts. Such catalyst systems may be useful in, for example, catalytic converters, fuel cells, sensors, and the like.

Ceyer, Sylvia T. (Cambridge, MA); Lahr, David L. (Cambridge, MA)

2010-11-09T23:59:59.000Z

369

The synthesis and characterization of porous, conductive, and ordered materials  

E-Print Network [OSTI]

Two different classes of polymers were pursued as candidates for materials possessing porosity, conductivity, and crystalline order. Attempts were made with hexaazatrinaphthylene- and dibenzotetrathiafulvalene-based ...

Narayan, Tarun Chandru

2013-01-01T23:59:59.000Z

370

Conducting oxide formation and mechanical endurance of potential solid-oxide fuel cell interconnects in coal syngas environment  

SciTech Connect (OSTI)

The oxidation properties of potential SOFCs materials Crofer 22 APU, Ebrite and Haynes 230 exposed in coal syngas at 800 °C for 100 h were studied. The phases and surface morphology of the oxide scales were characterized by X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray analysis (EDX). The mechanical endurance and electrical resistance of the conducting oxides were characterized by indentation and electrical impedance, respectively. It was found that the syngas exposure caused the alloys to form porous oxide scales, which increased the electrical resistant and decreased the mechanical stability. As for short-term exposure in syngas, neither carbide nor metal dusting was found in the scales of all samples.

Liu, Kejia; Luo, Junhang; Johnson, Christopher; Liu, Xingbo; Lang, J.; Mao, S.X.

2008-08-15T23:59:59.000Z

371

Porous platinum-based catalysts for oxygen reduction  

DOE Patents [OSTI]

A porous metal that comprises platinum and has a specific surface area that is greater than 5 m.sup.2/g and less than 75 m.sup.2/g. A fuel cell includes a first electrode, a second electrode spaced apart from the first electrode, and an electrolyte arranged between the first and the second electrodes. At least one of the first and second electrodes is coated with a porous metal catalyst for oxygen reduction, and the porous metal catalyst comprises platinum and has a specific surface area that is greater than 5 m.sup.2/g and less than 75 m.sup.2/g. A method of producing a porous metal according to an embodiment of the current invention includes producing an alloy consisting essentially of platinum and nickel according to the formula Pt.sub.xNi.sub.1-x, where x is at least 0.01 and less than 0.3; and dealloying the alloy in a substantially pH neutral solution to reduce an amount of nickel in the alloy to produce the porous metal.

Erlebacher, Jonah D; Snyder, Joshua D

2014-11-25T23:59:59.000Z

372

Polymer Welding: Strength Through Entanglements  

E-Print Network [OSTI]

Large-scale simulations of thermal welding of polymers are performed to investigate the rise of mechanical strength at the polymer-polymer interface with the welding time. The welding process is in the core of integrating polymeric elements into devices as well as in thermal induced healing of polymers; processes that require development of interfacial strength equal to that of the bulk. Our simulations show that the interfacial strength saturates at the bulk shear strength much before polymers diffuse by their radius of gyration. Along with the strength increase, the dominant failure mode changes from chain pullout at the interface to chain scission as in the bulk. Formation of sufficient entanglements across the interface, which we track using a Primitive Path Analysis is required to arrest catastrophic chain pullout at the interface. The bulk response is not fully recovered until the density of entanglements at the interface reaches the bulk value. Moreover, the increase of interfacial strength before saturation is proportional to the number of interfacial entanglements between chains from opposite sides.

Ting Ge; Flint Pierce; Dvora Perahia; Gary S. Grest; Mark O. Robbins

2012-11-29T23:59:59.000Z

373

Flow adjustment and interior flow associated with a rectangular porous obstruction  

E-Print Network [OSTI]

The flow at the leading edge and in the interior of a rectangular porous obstruction is described through experiments and scaling. The porous obstruction consists of an emergent, rectangular array of cylinders in shallow ...

Rominger, Jeffrey Tsaros

374

Discrete particle transport in porous media : discrete observations of physical mechanisms influencing particle behavior  

E-Print Network [OSTI]

An understanding of how discrete particles in the micron to submicron range behave in porous media is important to a number of environmental problems. Discrete particle behavior in the interior of a porous medium is complex ...

Yoon, Joon Sik, 1973-

2005-01-01T23:59:59.000Z

375

NERSC Analysis of Void Space of Porous Materials Used in Energy...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Porous Materials Analysis of Void Space of Porous Materials Used in Energy-related Applications fmm-smmaciek.jpg We have developed partial differential equations-based tools that...

376

Highly porous chemically modified carbon cryogels and their coherent nanocomposites for energy applications  

E-Print Network [OSTI]

the pores, porous media for natural gas (methane) storage at reduced pressure, and scaffolds for hydride the pores, porous media for natural gas (m of Mechanical Science and Engineering, Huazhong University of Science & Technology, Wuhan, 430074, China d

Cao, Guozhong

377

Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for Water...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for WaterEthanol Separation. Thin Porous Metal Sheet-Supported NaA Zeolite Membrane for WaterEthanol Separation. Abstract:...

378

Study of gas flow dynamics in porous and granular media with laser-polarized ą˛?Xe NMR  

E-Print Network [OSTI]

This thesis presents Nuclear Magnetic Resonance (NMR) studies of gas flow dynamics in porous and granular media by using laser-polarized ą˛?Xe . Two different physical processes, the gas transport in porous rock cores and ...

Wang, Ruopeng, 1972-

2005-01-01T23:59:59.000Z

379

Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Hollow Core-Shell Structured Porous Si-C Nanocomposites for Li-Ion Battery Anodes. Abstract:...

380

Hybrid deposition of thin film solid oxide fuel cells and electrolyzers  

DOE Patents [OSTI]

The use of vapor deposition techniques enables synthesis of the basic components of a solid oxide fuel cell (SOFC); namely, the electrolyte layer, the two electrodes, and the electrolyte-electrode interfaces. Such vapor deposition techniques provide solutions to each of the three critical steps of material synthesis to produce a thin film solid oxide fuel cell (TFSOFC). The electrolyte is formed by reactive deposition of essentially any ion conducting oxide, such as defect free, yttria stabilized zirconia (YSZ) by planar magnetron sputtering. The electrodes are formed from ceramic powders sputter coated with an appropriate metal and sintered to a porous compact. The electrolyte-electrode interface is formed by chemical vapor deposition of zirconia compounds onto the porous electrodes to provide a dense, smooth surface on which to continue the growth of the defect-free electrolyte, whereby a single fuel cell or multiple cells may be fabricated. 8 figs.

Jankowski, A.F.; Makowiecki, D.M.; Rambach, G.D.; Randich, E.

1998-05-19T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Porous siliconformation and etching process for use in silicon micromachining  

DOE Patents [OSTI]

A reproducible process for uniformly etching silicon from a series of micromechanical structures used in electrical devices and the like includes providing a micromechanical structure having a silicon layer with defined areas for removal thereon and an electrochemical cell containing an aqueous hydrofluoric acid electrolyte. The micromechanical structure is submerged in the electrochemical cell and the defined areas of the silicon layer thereon are anodically biased by passing a current through the electrochemical cell for a time period sufficient to cause the defined areas of the silicon layer to become porous. The formation of the depth of the porous silicon is regulated by controlling the amount of current passing through the electrochemical cell. The micromechanical structure is then removed from the electrochemical cell and submerged in a hydroxide solution to remove the porous silicon. The process is subsequently repeated for each of the series of micromechanical structures to achieve a reproducibility better than 0.3%.

Guilinger, Terry R. (Albuquerque, NM); Kelly, Michael J. (Albuquerque, NM); Martin, Jr., Samuel B. (Albuquerque, NM); Stevenson, Joel O. (Albuquerque, NM); Tsao, Sylvia S. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

382

Anisotropy of flow in stochastically generated porous media  

E-Print Network [OSTI]

Models of porous media are often applied to relatively small systems, which leads not only to system-size-dependent results, but also to phenomena that would be absent in larger systems. Here we investigate one such finite-size effect: anisotropy of the permeability tensor. We show that a non-zero angle between the external body force and macroscopic flux vector exists in three-dimensional periodic models of sizes commonly used in computer simulations and propose a criterion, based on the system size to the grain size ratio, for this phenomenon to be relevant or negligible. The finite-size anisotropy of the porous matrix induces a pressure gradient perpendicular to the axis of a porous duct and we analyze how this effect scales with the system and grain sizes.

Matyka, Maciej; Go?embiewski, Jaros?aw; Kostur, Marcin; Januszewski, Micha?

2013-01-01T23:59:59.000Z

383

Transports of Polymer Nanomedicine in the Environment  

E-Print Network [OSTI]

With increasing production and commercial use of polymer nanomedicine and a lack of regulation to govern their disposal, polymer nanomedicine may enter into soils and ultimately into ground water system. In this dissertation, adsorption of polymeric...

Zhang, Ming

2013-11-14T23:59:59.000Z

384

Modeling and Optimization of Interpenetrating Polymer  

E-Print Network [OSTI]

Modeling and Optimization of Interpenetrating Polymer Network Process Weijie Lin, Lorenz T. Biegler. Crosslinking Features Complex diffusion; single component reaction Complex composite networking reaction · Initiator feeding rate · Initial polymer · Monomer concentration · Initiator concentration · Holding

Grossmann, Ignacio E.

385

The challenges of organic polymer solar cells  

E-Print Network [OSTI]

The technical and commercial prospects of polymer solar cells were evaluated. Polymer solar cells are an attractive approach to fabricate and deploy roll-to-roll processed solar cells that are reasonably efficient (total ...

Saif Addin, Burhan K. (Burhan Khalid)

2011-01-01T23:59:59.000Z

386

Solvent-enhanced dye diffusion in polymer thin films for polymer light-emitting diode application  

E-Print Network [OSTI]

Solvent-enhanced dye diffusion in polymer thin films for polymer light-emitting diode application 2004; accepted 24 August 2004) The method of solvent-enhanced dye diffusion for patterning full dry transfer of dye onto a device polymer film, the dye remains on the surface of the polymer layer

387

Low-frequency dilatational wave propagation through unsaturated porous media containing two immiscible fluids  

E-Print Network [OSTI]

of elastic waves in unconsolidated unsaturated granularfrequency in both unconsolidated and consolidated materialsboth consolidated and unconsolidated porous media, and the

Lo, W.-C.

2009-01-01T23:59:59.000Z

388

Transport in Porous Media 52: 185211, 2003. 2003 Kluwer Academic Publishers. Printed in the Netherlands.  

E-Print Network [OSTI]

in the Netherlands. 185 Wettability Alteration to Intermediate Gas-Wetting in Porous Media at Elevated Temperatures

Firoozabadi, Abbas

389

Transport in Porous Media 57: 125152, 2004. 2004 Kluwer Academic Publishers. Printed in the Netherlands.  

E-Print Network [OSTI]

in the Netherlands. 125 Relative Permeabilities for Strictly Hyperbolic Models of Three-Phase Flow in Porous Media

Patzek, Tadeusz W.

390

Unwinding relaxation dynamics of polymers  

E-Print Network [OSTI]

The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque and it is of relevance also for DNA denaturation dynamics. We investigate it by simulations and Langevin equation analysis. The latter predicts a relaxation time scaling as a power of the polymer length times a logarithmic correction related to the equilibrium fluctuations of the winding angle. The numerical data support this result and show that at short times the winding angle decreases as a power-law. This is also in agreement with the Langevin equation provided a winding-dependent friction is used, suggesting that such reduced description of the system captures the basic features of the problem.

Jean-Charles Walter; Marco Baiesi; Gerard Barkema; Enrico Carlon

2013-01-13T23:59:59.000Z

391

Post polymerization cure shape memory polymers  

DOE Patents [OSTI]

This invention relates to chemical polymer compositions, methods of synthesis, and fabrication methods for devices regarding polymers capable of displaying shape memory behavior (SMPs) and which can first be polymerized to a linear or branched polymeric structure, having thermoplastic properties, subsequently processed into a device through processes typical of polymer melts, solutions, and dispersions and then crossed linked to a shape memory thermoset polymer retaining the processed shape.

Wilson, Thomas S; Hearon, Michael Keith; Bearinger, Jane P

2014-11-11T23:59:59.000Z

392

Water Quality and Hydrologic Performance of a Porous Asphalt Pavement as a Storm-Water  

E-Print Network [OSTI]

examined the functionality of a porous pavement storm-water management system in coastal New Hampshire headings: Stormwater management; Runoff; Porous media; Pavements; Cold regions; Best Management Practice; Water quality; Water treatment. Author keywords: Storm-water management; Runoff; Porous pavements; Cold

393

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents [OSTI]

Disclosed is an illumination source comprising a porous silicon having a source of electrons on the surface and/or interstices thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon. 1 fig.

Tam, S.W.

1997-02-25T23:59:59.000Z

394

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents [OSTI]

An illumination source comprising a porous silicon having a source of electrons on the surface and/or interticies thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1997-01-01T23:59:59.000Z

395

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents [OSTI]

An illumination source comprising a porous silicon having a source of electrons on the surface and/or interticies thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon.

Tam, Shiu-Wing (Downers Grove, IL)

1998-01-01T23:59:59.000Z

396

Porous silicon with embedded tritium as a stand-alone prime power source for optoelectronic applications  

DOE Patents [OSTI]

An illumination source is disclosed comprising a porous silicon having a source of electrons on the surface and/or interstices thereof having a total porosity in the range of from about 50 v/o to about 90 v/o. Also disclosed are a tritiated porous silicon and a photovoltaic device and an illumination source of tritiated porous silicon. 1 fig.

Tam, S.W.

1998-06-16T23:59:59.000Z

397

On the Effect of Porous Layers on Melting Heat Transfer in an Enclosure  

E-Print Network [OSTI]

On the Effect of Porous Layers on Melting Heat Transfer in an Enclosure E. A. Ellinger* and C. To enhance heat transfer, the porous layers are located in regions where the melting rates for a pure the porous layer and the pure fluid layer cause strong variations in heat transfer, melt convection

Beckermann, Christoph

398

The acoustical flows of the hydrophobic and anticeptic liquids in porous media  

E-Print Network [OSTI]

of the acoustical flows in the porous or microcrum- bling media. Concrete and brick walls being porous media absorbThe acoustical flows of the hydrophobic and anticeptic liquids in porous media V. Tsaplev North effect. Just the same, if the protective covering of the concrete or brick wall is damaged, they begin

Boyer, Edmond

399

DYNAMICS OF FREE SURFACES IN RANDOM POROUS MEDIA DANIEL M. TARTAKOVSKY AND C. L. WINTER  

E-Print Network [OSTI]

media to be concrete. Predicting flow through natural porous media is complicated by their high degreeDYNAMICS OF FREE SURFACES IN RANDOM POROUS MEDIA DANIEL M. TARTAKOVSKY AND C. L. WINTER SIAM J­1876 Abstract. We consider free surface flow in random porous media by treating hydraulic conduc- tivity

Tartakovsky, Daniel M.

400

A model for reactive porous transport during re-wetting of hardened concrete  

E-Print Network [OSTI]

A model for reactive porous transport during re-wetting of hardened concrete Michael Chapwanya residing in the porous concrete matrix. The main hypothesis in this model is that the reaction product hydration; Porous media; Reaction-diffusion equations; Vari- able porosity. 1. Introduction Concrete

Stockie, John

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Asymptotical Computations for a Model of Flow in Saturated Porous Media  

E-Print Network [OSTI]

a variably saturated porous medium with exponential diffusivity, such as soil, rock or concrete is given by uAsymptotical Computations for a Model of Flow in Saturated Porous Media P. Amodio a , C.J. Budd b for an implicit second order ordinary differential equation which arises in models of flow in saturated porous

WeinmĂĽller, Ewa B.

402

Imaging biofilm architecture within porous media using synchrotron-based X-ray computed microtomography  

E-Print Network [OSTI]

Imaging biofilm architecture within porous media using synchrotron-based X-ray computed. Wildenschild (2011), Imaging biofilm architecture within porous media using synchrotron-based X-ray computed synchrotron-based X-ray computed microtomography (CMT) has been developed. Imaging biofilms in porous media

Wildenschild, Dorthe

403

Electrochimica Acta 52 (2007) 43174324 Porous current collectors for passive direct methanol fuel cells  

E-Print Network [OSTI]

Electrochimica Acta 52 (2007) 4317­4324 Porous current collectors for passive direct methanol fuel methanol fuel cell (DMFC) with its cathode current collector made of porous metal foam was investigated that the passive DMFC having the porous current collector yielded much higher and much more stable performance than

Zhao, Tianshou

2007-01-01T23:59:59.000Z

404

Anion exchange polymer electrolytes  

DOE Patents [OSTI]

Solid anion exchange polymer electrolytes and compositions comprising chemical compounds comprising a polymeric core, a spacer A, and a guanidine base, wherein said chemical compound is uniformly dispersed in a suitable solvent and has the structure: ##STR00001## wherein: i) A is a spacer having the structure O, S, SO.sub.2, --NH--, --N(CH.sub.2).sub.n, wherein n=1-10, --(CH.sub.2).sub.n--CH.sub.3--, wherein n=1-10, SO.sub.2-Ph, CO-Ph, ##STR00002## wherein R.sub.5, R.sub.6, R.sub.7 and R.sub.8 each are independently --H, --NH.sub.2, F, Cl, Br, CN, or a C.sub.1-C.sub.6 alkyl group, or any combination of thereof; ii) R.sub.9, R.sub.10, R.sub.11, R.sub.12, or R.sub.13 each independently are --H, --CH.sub.3, --NH.sub.2, --NO, --CH.sub.nCH.sub.3 where n=1-6, HC.dbd.O--, NH.sub.2C.dbd.O--, --CH.sub.nCOOH where n=1-6, --(CH.sub.2).sub.n--C(NH.sub.2)--COOH where n=1-6, --CH--(COOH)--CH.sub.2--COOH, --CH.sub.2--CH(O--CH.sub.2CH.sub.3).sub.2, --(C.dbd.S)--NH.sub.2, --(C.dbd.NH)--N--(CH.sub.2).sub.nCH.sub.3, where n=0-6, --NH--(C.dbd.S)--SH, --CH.sub.2--(C.dbd.O)--O--C(CH.sub.3).sub.3, --O--(CH.sub.2).sub.n--CH--(NH.sub.2)--COOH, where n=1-6, --(CH.sub.2).sub.n--CH.dbd.CH wherein n=1-6, --(CH.sub.2).sub.n--CH--CN wherein n=1-6, an aromatic group such as a phenyl, benzyl, phenoxy, methylbenzyl, nitrogen-substituted benzyl or phenyl groups, a halide, or halide-substituted methyl groups; and iii) wherein the composition is suitable for use in a membrane electrode assembly.

Kim, Yu Seung; Kim, Dae Sik; Lee, Kwan-Soo

2013-07-23T23:59:59.000Z

405

Novel polyoxazolines polymer drug delivery platform  

E-Print Network [OSTI]

performed with 4 different polymers in multi- drug resistant (MCF7/ADR) human adenocarcinoma cells, non-resistant (MCF7) human adenocarcinoma cells and Madin-Darby canine kidney (MDCK) cells. All polymers were found lines. 2. To investigate the effect of the addition of drugs to the polymers on cell toxicity, micelles

406

Organosiloxane-grafted natural polymer coatings  

DOE Patents [OSTI]

A new family of polysaccharide graft polymers are provided as corrosion resistant coatings having antimicrobial properties which are useful on light metals such as aluminum, magnesium, zinc, steel and their alloys. Methods of making the polysaccharide graft polymers are also included. The methods of making the polysaccharide graft polymers involve reacting a polysaccharide source with an antimicrobial agent under conditions of hydrolysis-condensation.

Sugama, Toshifumi (Wading River, NY)

1998-01-01T23:59:59.000Z

407

Modeling and Optimization for Interpenetrating polymer  

E-Print Network [OSTI]

Modeling and Optimization for Interpenetrating polymer network process 1 Weijie Lin, Lorenz T #12;Project Overview · IPN Interpenetrating polymer network ­ A combination of two polymers in a network form Fig. 2 An IPN process example · Typical Sequential Type of Process Fig. 1 IPN network

Grossmann, Ignacio E.

408

Microstructure Sensitive Design and Processing in Solid Oxide Electrolyzer Cell  

SciTech Connect (OSTI)

The aim of this study was to develop and inexpensive manufacturing process for deposition of functionally graded thin films of LSM oxides with porosity graded microstructures for use as IT-SOFCs cathode. The spray pyrolysis method was chosen as a low-temperature processing technique for deposition of porous LSM films onto dense YXZ substrates. The effort was directed toward the optimization of the processing conditions for deposition of high quality LSM films with variety of morphologies in the range of dense to porous microstructures. Results of optimization studies of spray parameters revealed that the substrate surface temperature is the most critical parameter influencing the roughness and morphology, porosity, cracking and crystallinity of the film.

Dr. Hamid Garmestani; Dr. Stephen Herring

2009-06-12T23:59:59.000Z

409

Water-soluble conductive polymers  

DOE Patents [OSTI]

Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

Aldissi, M.

1988-02-12T23:59:59.000Z

410

Water-soluble conductive polymers  

DOE Patents [OSTI]

Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

Aldissi, Mahmoud (Sante Fe, NM)

1989-01-01T23:59:59.000Z

411

Water-soluble conductive polymers  

DOE Patents [OSTI]

Polymers which are soluble in water and are electrically conductive. The monomer repeat unit is a thiophene or pyrrole molecule having an alkyl group substituted for the hydrogen atom located in the beta position of the thiophene or pyrrole ring and having a surfactant molecule at the end of the alkyl chain. Polymers of this class having 8 or more carbon atoms in the alkyl chain exhibit liquid crystalline behavior, resulting in high electrical anisotropy. The monomer-to-monomer bonds are located between the carbon atoms which are adjacent to the sulfur or nitrogen atoms. The number of carbon atoms in the alkyl group may vary from 1 to 20 carbon atoms. The surfactant molecule consists of a sulfonate group, or a sulfate group, or a carboxylate group, and hydrogen or an alkali metal. Negative ions from a supporting electrolyte which may be used in the electrochemical synthesis of a polymer may be incorporated into the polymer during the synthesis and serve as a dopant to increase the conductivity.

Aldissi, Mahmoud (Sante Fe, NM)

1990-01-01T23:59:59.000Z

412

Friction between Ring Polymer Brushes  

E-Print Network [OSTI]

Friction between ring-polymer brushes at melt densities sliding past each other are studied using extensive course-grained molecular dynamics simulations and scaling arguments, and the results are compared to the friction between linear-polymer brushes. We show that for a velocity range spanning over three decades, the frictional forces measured for ring-polymer brushes are half the corresponding friction in case of linear brushes. In the linear-force regime, the weak inter-digitation of two ring brushes compared to linear brushes also leads to a lower number of binary collisions between the monomers of opposing brushes. At high velocities, where the thickness of the inter-digitation layer between two opposing brushes is on the order monomer size regardless of brush topology, stretched segments of ring polymers take a double-stranded conformation. As a result, monomers of the double-stranded segments collide less with the monomers of the opposing ring brush even though a similar number of monomers occupies the inter-digitation layer for ring and linear-brush bilayers. The numerical data obtained from our simulations is consistent with the proposed scaling analysis. Conformation-dependent frictional reduction observed in ring brushes can have important consequences in non-equilibrium bulk systems.

A. Erbas; J. Paturej

2015-01-07T23:59:59.000Z

413

Conducting Polymer Devices for Bioelectronics  

E-Print Network [OSTI]

signals recording. Organic electrochemical transistors (OECTs) represent a step beyond conducting polymer a far superior signal-to-noise- ratio (SNR) compared to electrodes. The high SNR of the OECT recordings and contamination. The use of an organic electrochemical transistor for detection of lactate by integration

Paris-Sud XI, Université de

414

Enhanced photophysics of conjugated polymers  

DOE Patents [OSTI]

A particulate fluorescent conjugated polymer surfactant complex and method of making and using same. The particles are between about 15 and about 50 nm and when formed from a lipsome surfactant have a charge density similar to DNA and are strongly absorbed by cancer cells.

Chen, Liaohai (Darien, IL)

2007-06-12T23:59:59.000Z

415

Stretching of polymers in a turbulent environment  

E-Print Network [OSTI]

The interaction of polymers with small-scale velocity gradients can trigger a coil-stretch transition in the polymers. We analyze this transition within a direct numerical simulation of shear turbulence with an Oldroyd-B model for the polymer. In the coiled state the lengths of polymers are distributed algebraically with an exponent alpha=2 gamma-1/De, where gamma is a characteristic stretching rate of the flow and De the Deborah number. In the stretched state we demonstrate that the length distribution of the polymers is limited by the feedback to the flow.

Bruno Eckhardt; Jochen Kronjaeger; Joerg Schumacher

2002-01-20T23:59:59.000Z

416

Method of forming a foamed thermoplastic polymer  

DOE Patents [OSTI]

A solid thermoplastic polymer is immersed in an immersant solution comprising a compatible carrier solvent and an infusant solution containing an incompatible liquid blowing agent for a time sufficient for the immersant solution to infuse into the polymer. The carrier solvent is then selectively extracted, preferably by a solvent exchange process in which the immersant solution is gradually diluted with and replaced by the infusant solution, so as to selectively leave behind the infustant solution permanently entrapped in the polymer. The polymer is then heated to volatilize the blowing agent and expand the polymer into a foamed state.

Duchane, D.V.; Cash, D.L.

1984-11-21T23:59:59.000Z

417

Acoustic wave propagation in two-phase heterogeneous porous media  

E-Print Network [OSTI]

The propagation of an acoustic wave through two-phase porous media with spatial variation in porosity is studied. The evolutionary wave equation is derived, and the propagation of an acoustic wave is numerically analyzed in application to marine sediments with various physical parameters.

J. I. Osypik; N. I. Pushkina; Ya. M. Zhileikin

2015-03-19T23:59:59.000Z

418

Numerical simulation of transpiration cooling through porous , T. Gotzen1  

E-Print Network [OSTI]

55, 52056 Aachen SUMMARY Transpiration cooling using ceramic matrix composite (CMC) materials to facilitate such numerical simulations for a carbon/carbon material mounted in the side wall of a hot gasNumerical simulation of transpiration cooling through porous material W. Dahmen1 , T. Gotzen1 and S

419

ORIGINAL PAPER Conditional simulations of wateroil flow in heterogeneous porous  

E-Print Network [OSTI]

water standards. Thus, a small amount of NAPL can contaminate large volumes of groundwater over a long period of time. Therefore, it is very important to understand the processes associated with contaminant is a complicated mixture of hydrocarbon fluids, brine, porous rock and fractures. The structure of the void space

Lu, Zhiming

420

Elastic properties of saturated porous rocks with aligned fractures  

E-Print Network [OSTI]

Several treatments of the porous media with aligned fractures have been ...... a function of background porosity /p for water-satu- rated rock (Kf = 2.25 ? 109 Pa). .... that are in hydraulic equilibrium with the fractures, the fluid will squeeze from ...

2003-12-02T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Numerical simulation of fluid flow in porous/fractured media  

SciTech Connect (OSTI)

Theoretical models of fluid flow in porous/fractured media can help in the design of in situ fossil energy and mineral extraction technologies. Because of the complexity of these processes, numerical solutions are usually required. Sample calculations illustrate the capabilities of present day computer models.

Travis B.J.; Cook, T.L.

1981-01-01T23:59:59.000Z

422

Method for the preparation of ferrous low carbon porous material  

SciTech Connect (OSTI)

A method for preparing a porous metal article using a powder metallurgy forming process is provided which eliminates the conventional steps associated with removing residual carbon. The method uses a feedstock that includes a ferrous metal powder and a polycarbonate binder. The polycarbonate binder can be removed by thermal decomposition after the metal article is formed without leaving a carbon residue.

Miller, Curtis Jack

2014-05-27T23:59:59.000Z

423

Exponential decay in one-dimensional porous-thermo-elasticity  

E-Print Network [OSTI]

is the equilibrated stress, g is the equilibrated body force and q is the heat flux. The variables u" (BFM2003- 00309) of the Spanish Ministry of Science and Technology. Keywords: porous energy density is a positive definite form. Thus, the constitutive coefficients satisfy the conditions: µ

Politècnica de Catalunya, Universitat

424

Integrating Structure Control over Multiple Length Scales in Porous High  

E-Print Network [OSTI]

temperature catalytic applications for their high surface area and low flow resistance in combination with thermal and chemical stability. We have developed a bottom-up approach to functional, porous, high results in three-dimensionally interconnected, high-temperature ceramic materials functionalized with well

Gruner, Sol M.

425

COMPARISON OF VARIOUS FORMULATIONS OF THREEPHASE FLOW IN POROUS MEDIA  

E-Print Network [OSTI]

permeability and capillary pressure curves satisfy a so­called total differential condition, the pseudo­global, oil, and gas) flow in porous media, including phase, global, and pseudo­global pressure and numerically presented for the first time. It is shown that the global pressure­saturation formulation

426

Polymer compositions, polymer films and methods and precursors for forming same  

DOE Patents [OSTI]

Stable, high performance polymer compositions including polybenzimidazole (PBI) and a melamine-formaldehyde polymer, such as methylated, poly(melamine-co-formaldehyde), for forming structures such as films, fibers and bulky structures. The polymer compositions may be formed by combining polybenzimidazole with the melamine-formaldehyde polymer to form a precursor. The polybenzimidazole may be reacted and/or intertwined with the melamine-formaldehyde polymer to form the polymer composition. For example, a stable, free-standing film having a thickness of, for example, between about 5 .mu.m and about 30 .mu.m may be formed from the polymer composition. Such films may be used as gas separation membranes and may be submerged into water for extended periods without crazing and cracking. The polymer composition may also be used as a coating on substrates, such as metal and ceramics, or may be used for spinning fibers. Precursors for forming such polymer compositions are also disclosed.

Klaehn, John R; Peterson, Eric S; Orme, Christopher J

2013-09-24T23:59:59.000Z

427

Study of optical properties of Erbium doped Tellurite glass-polymer composite  

SciTech Connect (OSTI)

Chalcogenide glasses have wide applications in optical device technology. But it has some disadvantages like thermal instability. Among them Tellurite glasses exhibits high thermal Stability. Doping of rare earth elements into the Tellurite glasses improve its optical properties. To improve its mechanical properties composites of this Tellurite glasses with polymer are prepared. Bulk samples of Er{sub 2}O{sub 3} doped TeO{sub 2}?WO{sub 3}?La{sub 2}O{sub 3} Tellurite glasses are prepared from high purity oxide mixtures, melting in an alumina crucible in air atmosphere. Composites of this Tellurite glasses with polymer are prepared by powder mixing method and the thin films of these composites are prepared using polymer press. Variations in band gap of these composites are studied from the UV/Vis/NIR absorption.

Sushama, D., E-mail: sushasukumar@gmail.com [Research Awardee, LAMP, Dept. of Physics, Nit, Calicut, India and Dept. of Physics, M.S.M. College, Kayamkulam, Kerala (India)

2014-10-15T23:59:59.000Z

428

A thermally self-sustained micro solid-oxide fuel-cell stack with high power density  

E-Print Network [OSTI]

A thermally self-sustained micro solid-oxide fuel-cell stack with high power density Zongping Shao1 for portable power generation1,2 . Accordingly, polymer-electrolyte direct- methanol fuel cells design challenges and cannot operate with hydrocarbon fuels of higher energy density. Solid-oxide fuel

Haile, Sossina M.

429

Fabrication of solid oxide fuel cell by electrochemical vapor deposition  

DOE Patents [OSTI]

In a high temperature solid oxide fuel cell (SOFC), the deposition of an impervious high density thin layer of electrically conductive interconnector material, such as magnesium doped lanthanum chromite, and of an electrolyte material, such as yttria stabilized zirconia, onto a porous support/air electrode substrate surface is carried out at high temperatures (/approximately/1100/degree/ /minus/ 1300/degree/C) by a process of electrochemical vapor deposition. In this process, the mixed chlorides of the specific metals involved react in the gaseous state with water vapor resulting in the deposit of an impervious thin oxide layer on the support tube/air electrode substrate of between 20--50 microns in thickness. An internal heater, such as a heat pipe, is placed within the support tube/air electrode substrate and induces a uniform temperature profile therein so as to afford precise and uniform oxide deposition kinetics in an arrangement which is particularly adapted for large scale, commercial fabrication of SOFCs.

Riley, B.; Szreders, B.E.

1988-04-26T23:59:59.000Z

430

Fabrication of solid oxide fuel cell by electrochemical vapor deposition  

DOE Patents [OSTI]

In a high temperature solid oxide fuel cell (SOFC), the deposition of an impervious high density thin layer of electrically conductive interconnector material, such as magnesium doped lanthanum chromite, and of an electrolyte material, such as yttria stabilized zirconia, onto a porous support/air electrode substrate surface is carried out at high temperatures (approximately 1100.degree.-1300.degree. C.) by a process of electrochemical vapor deposition. In this process, the mixed chlorides of the specific metals involved react in the gaseous state with water vapor resulting in the deposit of an impervious thin oxide layer on the support tube/air electrode substrate of between 20-50 microns in thickness. An internal heater, such as a heat pipe, is placed within the support tube/air electrode substrate and induces a uniform temperature profile therein so as to afford precise and uniform oxide deposition kinetics in an arrangement which is particularly adapted for large scale, commercial fabrication of SOFCs.

Brian, Riley (Willimantic, CT); Szreders, Bernard E. (Oakdale, CT)

1989-01-01T23:59:59.000Z

431

Solid oxide MEMS-based fuel cells  

DOE Patents [OSTI]

A micro-electro-mechanical systems (MEMS) based thin-film fuel cells for electrical power applications. The MEMS-based fuel cell may be of a solid oxide type (SOFC), a solid polymer type (SPFC), or a proton exchange membrane type (PEMFC), and each fuel cell basically consists of an anode and a cathode separated by an electrolyte layer. The electrolyte layer can consist of either a solid oxide or solid polymer material, or proton exchange membrane electrolyte materials may be used. Additionally catalyst layers can also separate the electrodes (cathode and anode) from the electrolyte. Gas manifolds are utilized to transport the fuel and oxidant to each cell and provide a path for exhaust gases. The electrical current generated from each cell is drawn away with an interconnect and support structure integrated with the gas manifold. The fuel cells utilize integrated resistive heaters for efficient heating of the materials. By combining MEMS technology with thin-film deposition technology, thin-film fuel cells having microflow channels and full-integrated circuitry can be produced that will lower the operating temperature an will yield an order of magnitude greater power density than the currently known fuel cells.

Jankowksi, Alan F.; Morse, Jeffrey D.

2007-03-13T23:59:59.000Z

432

Project Profile: High Performance Reduction/Oxidation Metal Oxides...  

Office of Environmental Management (EM)

High Performance ReductionOxidation Metal Oxides for Thermochemical Energy Storage Project Profile: High Performance ReductionOxidation Metal Oxides for Thermochemical Energy...

433

Latent heat fluxes through nano-engineered porous materials  

E-Print Network [OSTI]

Micro- and nano-scale truss architectures provide mechanical strength, light weight, and breatheability in polymer barriers. Liquid evaporation and transport of resulting vapor through truss voids (pores) cools surfaces ...

Traum, Matthew J. (Matthew Jason), 1977-

2007-01-01T23:59:59.000Z

434

Internal dissipation of a polymer  

SciTech Connect (OSTI)

The dynamics of flexible polymer molecules are often assumed to be governed by hydrodynamics of the solvent. However there is considerable evidence that internal dissipation of a polymer contributes as well. Here we investigate the dynamics of a single chain in the absence of solvent to characterize the nature of this internal friction. We model the chains as freely hinged but with localized bond angles and threefold symmetric dihedral angles. We show that the damping is close but not identical to Kelvin damping, which depends on the first temporal and second spatial derivative of monomer position. With no internal potential between monomers, the magnitude of the damping is small for long wavelengths and weakly damped oscillatory time dependent behavior is seen for a large range of spatial modes. When the size of the internal potential is increased, such oscillations persist, but the damping becomes larger. However underdamped motion is present even with quite strong dihedral barriers for long enough wavelengths.

Deutsch, J. M. [Department of Physics, University of California, Santa Cruz, California 95064 (United States)

2010-06-15T23:59:59.000Z

435

Polymer system for gettering hydrogen  

DOE Patents [OSTI]

A novel composition comprising organic polymer molecules having carbon-carbon double bonds, for removing hydrogen from the atmosphere within enclosed spaces. Organic polymers molecules containing carbon-carbon double bonds throughout their structures, preferably polybutadiene, polyisoprene and derivatives thereof, intimately mixed with an insoluble catalyst composition, comprising a hydrogenation catalyst and a catalyst support, preferably Pd supported on carbon, provide a hydrogen getter composition useful for removing hydrogen from enclosed spaces even in the presence of contaminants such as common atmospheric gases, water vapor, carbon dioxide, ammonia, oil mists, and water. The hydrogen getter composition disclosed herein is particularly useful for removing hydrogen from enclosed spaces containing potentially explosive mixtures of hydrogen and oxygen.

Shepodd, Timothy Jon (330 Thrasher Ave., Livermore, Alameda County, CA 94550); Whinnery, LeRoy L. (4929 Julie St., Livermore, Alameda County, CA 94550)

2000-01-01T23:59:59.000Z

436

Polymer formulations for gettering hydrogen  

DOE Patents [OSTI]

A novel composition comprising organic polymer molecules having carbon-carbon double bonds, for removing hydrogen from the atmosphere within enclosed spaces. Organic polymers molecules containing carbon-carbon double bonds throughout their structures, preferably polybutadiene, polyisoprene and derivatives thereof, intimately mixed with an insoluble catalyst composition, comprising a hydrogenation catalyst and a catalyst support, preferably Pd supported on carbon, provide a hydrogen getter composition useful for removing hydrogen from enclosed spaces even in the presence of contaminants such as common atmospheric gases, water vapor, carbon dioxide, ammonia, oil mists, and water. The hydrogen getter composition disclosed herein is particularly useful for removing hydrogen from enclosed spaces containing potentially explosive mixtures of hydrogen and oxygen.

Shepodd, Timothy Jon (Livermore, CA); Whinnery, LeRoy L. (Livermore, CA)

1998-11-17T23:59:59.000Z

437

Diamond turning of thermoplastic polymers  

SciTech Connect (OSTI)

Single point diamond turning studies were made using a series of thermoplastic polymers with different glass transition temperatures. Variations in surface morphology and surface roughness were observed as a function of cutting speed. Lower glass transition temperatures facilitate smoother surface cuts and better surface finish. This can be attributed to the frictional heating that occurs during machining. Because of the very low glass transition temperatures in polymeric compared to inorganic glasses, the precision machining response can be very speed sensitive.

Smith, E.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

438

Electrically conductive polymer concrete coatings  

DOE Patents [OSTI]

A sprayable electrically conductive polymer concrete coating for vertical and overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt% calcined coke breeze, 40 wt% vinyl ester resin with 3.5 wt% modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag. 4 tabs.

Fontana, J.J.; Elling, D.; Reams, W.

1988-05-26T23:59:59.000Z

439

Electrically conductive polymer concrete coatings  

DOE Patents [OSTI]

A sprayable electrically conductive polymer concrete coating for vertical d overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt % calcined coke breeze, 40 wt % vinyl ester with 3.5 wt % modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag.

Fontana, Jack J. (Shirley, NY); Elling, David (Centereach, NY); Reams, Walter (Shirley, NY)

1990-01-01T23:59:59.000Z

440

Electrically conductive polymer concrete coatings  

DOE Patents [OSTI]

A sprayable electrically conductive polymer concrete coating for vertical d overhead applications is described. The coating is permeable yet has low electrical resistivity (<10 ohm-cm), good bond strength to concrete substrates, and good weatherability. A preferred formulation contains about 60 wt % calcined coke breeze, 40 wt % vinyl ester with 3.5 wt % modified bentonite clay. Such formulations apply evenly and provide enough rigidity for vertical or overhead structures so there is no drip or sag.

Fontana, J.J.; Elling, D.; Reams, W.

1990-03-13T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Model-based experimental analysis for inter-polymer process  

E-Print Network [OSTI]

) + Polyethylene (PE) ARCEL TOUGH FLEXIBLE Advanced packaging material Interpenetrating polymer network productModel-based experimental analysis for inter-polymer process CMU: Weijie Lin, Lorenz T. Biegler processed in a sequential way Polymer A Polymer B Project overview Inter-polymer process #12;Project

Grossmann, Ignacio E.

442

Improving reservoir conformance using gelled polymer systems. Annual report, September 25, 1994--September 24, 1995  

SciTech Connect (OSTI)

The objectives of the research program are to (1) identify and develop polymer systems which have potential to improve reservoir conformance of fluid displacement processes, (2) determine the performance of these systems in bulk and in porous media, and (3) develop methods to predict their performance in field applications. The research focused on four types of gel systems -- KUSP1 systems which contain an aqueous polysaccharide designated KUSP1, phenolic-aldehyde systems composed of resorcinol and formaldehyde, colloidal-dispersion systems composed of polyacrylamide and aluminum citrate, and a chromium-based system where polyacrylamide is crosslinked by chromium(III). Gelation behavior of the resorcinol-formaldehyde systems and the KUSP1-borate system was examined. Size distributions of aggregates that form in the polyacrylamide-aluminum colloidal-dispersion gel system were determined. Permeabilities to brine of several rock materials were significantly reduced by gel treatments using the KUSP1 polymer-ester (monoethylphthalate) system, the KUSP1 polymer-boric acid system, and the sulfomethylated resorcinol-formaldehyde system. The KUSP1 polymer-ester system and the sulfomethylated resorcinol-formaldehyde system were also shown to significantly reduce the permeability to super-critical carbon dioxide. A mathematical model was developed to simulate the behavior of a chromium redox-polyacrylamide gel system that is injected through a wellbore into a multi-layer reservoir in which crossflow between layers is allowed. The model describes gelation kinetics and filtration of pre-gel aggregates in the reservoir. Studies using the model demonstrated the effect filtration of gel aggregates has on the placement of gel systems in layered reservoirs.

Green, D.W.; Willhite, G.P.

1996-05-01T23:59:59.000Z

443

Si6H12/Polymer Inks for Electrospinning a-Si Nanowire Lithium Ion Battery Anodes  

SciTech Connect (OSTI)

Amorphous silicon nanowires 'a-SiNWs' have been prepared by electrospinning a liquid silane-based precursor. Cyclohexasilane 'Si6H12' was admixed with poly-methyl methacrylate (PMMA) in toluene giving an ink that was electrospun into the Si6H12/PPMA wires with diameters of 50-2000 nm. Raman spectroscopy revealed that thermal treatment at 350 C transforms this deposit into a-SiNWs. These materials were coated with a thin carbon layer and then tested as half-cells where a reasonable plateau in electrochemical cycling was observed after an initial capacity fade. Additionally, porous a-SiNWs were realized when the thermally decomposable binder polypropylene carbonate/polycyclohexene carbonate was used as the polymer carrier.

Schulz, Douglas L.; Hoey, Justin; Smith, Jeremiah; Elangovan, Arumugasamy; Wu, Xiangfa; Akhatov, Iskander; Payne, Scott; Moore, Jayma; Boudjouk, Philip; Pederson, Larry; Xiao, Jie; Zhang, Jiguang

2010-08-04T23:59:59.000Z

444

Solid oxide fuel cell matrix and modules  

DOE Patents [OSTI]

Porous refractory ceramic blocks arranged in an abutting, stacked configuration and forming a three dimensional array provide a support structure and coupling means for a plurality of solid oxide fuel cells (SOFCs). The stack of ceramic blocks is self-supporting, with a plurality of such stacked arrays forming a matrix enclosed in an insulating refractory brick structure having an outer steel layer. The necessary connections for air, fuel, burnt gas, and anode and cathode connections are provided through the brick and steel outer shell. The ceramic blocks are so designed with respect to the strings of modules that by simple and logical design the strings could be replaced by hot reloading if one should fail. The hot reloading concept has not been included in any previous designs. 11 figs.

Riley, B.

1988-04-22T23:59:59.000Z

445

Asphalt Oxidation Kinetics and Pavement Oxidation Modeling  

E-Print Network [OSTI]

Most paved roads in the United States are surfaced with asphalt. These asphalt pavements suffer from fatigue cracking and thermal cracking, aggravated by the oxidation and hardening of asphalt. This negative impact of asphalt oxidation on pavement...

Jin, Xin

2012-07-16T23:59:59.000Z

446

Metallocene/carbon hybrids prepared by a solution process for supercapacitor applications  

E-Print Network [OSTI]

Efficient and scalable solution-based processes are not generally available to integrate well-studied pseudocapacitive materials (i.e., metal oxides and conducting polymers) with other components such as porous carbon, ...

Mao, Xianwen

447

Tritium containing polymers having a polymer backbone substantially void of tritium  

DOE Patents [OSTI]

A radioluminescent light source comprises a solid mixture of a phosphorescent substance and a tritiated polymer. The solid mixture forms a solid mass having length, width, and thickness dimensions, and is capable of self-support. In one aspect of the invention, the phosphorescent substance comprises solid phosphor particles supported or surrounded within a solid matrix by a tritium containing polymer. The tritium containing polymer comprises a polymer backbone which is essentially void of tritium.

Jensen, George A. (Richland, WA); Nelson, David A. (Richland, WA); Molton, Peter M. (Richland, WA)

1992-01-01T23:59:59.000Z

448

Tritium containing polymers having a polymer backbone substantially void of tritium  

DOE Patents [OSTI]

A radioluminescent light source comprises a solid mixture of a phosphorescent substance and a tritiated polymer. The solid mixture forms a solid mass having length, width, and thickness dimensions, and is capable of self-support. In one aspect of the invention, the phosphorescent substance comprises solid phosphor particles supported or surrounded within a solid matrix by a tritium containing polymer. The tritium containing polymer comprises a polymer backbone which is essentially void of tritium. 2 figs.

Jensen, G.A.; Nelson, D.A.; Molton, P.M.

1992-03-31T23:59:59.000Z

449

Asphaltenes-based polymer nano-composites  

DOE Patents [OSTI]

Inventive composite materials are provided. The composite is preferably a nano-composite, and comprises an asphaltene, or a mixture of asphaltenes, blended with a polymer. The polymer can be any polymer in need of altered properties, including those selected from the group consisting of epoxies, acrylics, urethanes, silicones, cyanoacrylates, vulcanized rubber, phenol-formaldehyde, melamine-formaldehyde, urea-formaldehyde, imides, esters, cyanate esters, allyl resins.

Bowen, III, Daniel E

2013-12-17T23:59:59.000Z

450

Organosiloxane-grafted natural polymer coatings  

DOE Patents [OSTI]

A new family of polysaccharide graft polymers are provided as corrosion resistant coatings having antimicrobial properties which are useful on light metals such as aluminum, magnesium, zinc, steel and their alloys. Methods of making the polysaccharide graft polymers are also included. The methods of making the polysaccharide graft polymers involve reacting a polysaccharide source with an antimicrobial agent under conditions of hydrolysis-condensation. 17 figs.

Sugama, Toshifumi

1998-12-01T23:59:59.000Z

451

Nonlinear Dynamics of Capacitive Charging and Desalination by Porous Electrodes  

E-Print Network [OSTI]

The rapid and efficient exchange of ions between porous electrodes and aqueous solutions is important in many applications, such as electrical energy storage by super-capacitors, water desalination and purification by capacitive deionization (or desalination), and capacitive extraction of renewable energy from a salinity difference. Here, we present a unified mean-field theory for capacitive charging and desalination by ideally polarizable porous electrodes (without Faradaic reactions or specific adsorption of ions) in the limit of thin double layers (compared to typical pore dimensions). We illustrate the theory in the case of a dilute, symmetric, binary electrolyte using the Gouy-Chapman-Stern (GCS) model of the double layer, for which simple formulae are available for salt adsorption and capacitive charging of the diffuse part of the double layer. We solve the full GCS mean-field theory numerically for realistic parameters in capacitive deionization, and we derive reduced models for two limiting regimes wi...

Biesheuvel, P M

2009-01-01T23:59:59.000Z

452

Rounding of the localization transition in model porous media  

E-Print Network [OSTI]

The generic mechanisms of anomalous transport in porous media are investigated by computer simulations of two-dimensional model systems. In order to bridge the gap between the strongly idealized Lorentz model and realistic models of porous media, two models of increasing complexity are considered: a cherry-pit model with hard-core correlations as well as a soft-potential model. An ideal gas of tracer particles inserted into these structures is found to exhibit anomalous transport which extends up to several decades in time. Also, the self-diffusion of the tracers becomes suppressed upon increasing the density of the systems. These phenomena are attributed to an underlying percolation transition. In the soft potential model the transition is rounded, since each tracer encounters its own critical density according to its energy. Therefore, the rounding of the transition is a generic occurrence in realistic, soft systems.

Simon K. Schnyder; Markus Spanner; Felix Höfling; Thomas Franosch; Jürgen Horbach

2014-11-07T23:59:59.000Z

453

Methods for making a porous nuclear fuel element  

DOE Patents [OSTI]

Porous nuclear fuel elements for use in advanced high temperature gas-cooled nuclear reactors (HTGR's), and to processes for fabricating them. Advanced uranium bi-carbide, uranium tri-carbide and uranium carbonitride nuclear fuels can be used. These fuels have high melting temperatures, high thermal conductivity, and high resistance to erosion by hot hydrogen gas. Tri-carbide fuels, such as (U,Zr,Nb)C, can be fabricated using chemical vapor infiltration (CVI) to simultaneously deposit each of the three separate carbides, e.g., UC, ZrC, and NbC in a single CVI step. By using CVI, the nuclear fuel may be deposited inside of a highly porous skeletal structure made of, for example, reticulated vitreous carbon foam.

Youchison, Dennis L; Williams, Brian E; Benander, Robert E

2014-12-30T23:59:59.000Z

454

Self-assembled porous media from particle-stabilized emulsions  

E-Print Network [OSTI]

We propose a new mechanism to create self-assembled porous media with highly tunable geometrical properties and permeabilities: We first allow a particle-stabilized emulsion to form from a mixture of two fluids and colloidal particles. Then, either one fluid phase or the particle layer is solidified, which can be achieved by techniques such as polymerization or freezing. Based on computer simulations we demonstrate that modifying only the particle wettability or concentration results in porous structures with a wide range of pore sizes and a permeability that can be varied by up to three orders of magnitude. We then discuss optimization of these properties for self-assembled filters or reactors and conclude that structures based on so-called "bijels" are most suitable candidates.

Stefan Frijters; Jens Harting

2014-08-13T23:59:59.000Z

455

Two-phase flow in a chemically active porous medium  

E-Print Network [OSTI]

We study the problem of the transformation of a given reactant species into an immiscible product species, as they flow through a chemically active porous medium. We derive the equation governing the evolution of the volume fraction of the species -- in a one-dimensional macroscopic description --, identify the relevant dimensionless numbers, and provide simple models for capillary pressure and relative permeabilities, which are quantities of crucial importance when tackling multiphase flows in porous media. We set the domain of validity of our models and discuss the importance of viscous coupling terms in the extended Darcy's law. We investigate numerically the steady regime and demonstrate that the spatial transformation rate of the species along the reactor is non-monotonous, as testified by the existence of an inflection point in the volume fraction profiles. We obtain the scaling of the location of this inflection point with the dimensionless lengths of the problem. Eventually, we provide key elements for optimization of the reactor.

Alexandre Darmon; Michael Benzaquen; Thomas Salez; Olivier Dauchot

2014-11-20T23:59:59.000Z

456

The Uniaxial Tensile Response of Porous and Microcracked Ceramic Materials  

SciTech Connect (OSTI)

The uniaxial tensile stress-strain behavior of three porous ceramic materials was determined at ambient conditions. Test specimens in the form of thin beams were obtained from the walls of diesel particulate filter honeycombs and tested using a microtesting system. A digital image correlation technique was used to obtain full-field 2D in-plane surface displacement maps during tensile loading, and in turn, the 2D strains obtained from displacement fields were used to determine the Secant modulus, Young s modulus and initial Poisson s ratio of the three porous ceramic materials. Successive unloading-reloading experiments were performed at different levels of stress to decouple the linear elastic, anelastic and inelastic response in these materials. It was found that the stress-strain response of these materials was non-linear and that the degree of nonlinearity is related to the initial microcrack density and evolution of damage in the material.

Pandey, Amit [ORNL; Shyam, Amit [ORNL; Watkins, Thomas R [ORNL; Lara-Curzio, Edgar [ORNL; Lara-Curzio, Edgar [ORNL; Stafford, Randall [Cummins, Inc; Hemker, Kevin J [Johns Hopkins University

2014-01-01T23:59:59.000Z

457

Conducting polymer actuator enhancement through microstructuring  

E-Print Network [OSTI]

Electroactive conducting polymers, such as polypyrrole, polyaniline, and polythiophenes are currently studied as novel biologically inspired actuators. The actuation mechanisms in these materials are based on the diffusion ...

Pillai, Priam Vasudevan

2007-01-01T23:59:59.000Z

458

Fabrication and characterization of conducting polymer microwires  

E-Print Network [OSTI]

Flexible microwires fabricated from conducting polymers have a wide range of potential applications, including smart textiles that incorporate sensing, actuation, and data processing. The development of garments that ...

Saez, Miguel Angel

2009-01-01T23:59:59.000Z

459

Imaging Hydrated Microbial Extracellular Polymers: Comparative...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

dehydration-based sample preparation that resulted in the collapse of hydrated gel-like EPS into filamentous structures. Dehydration-induced polymer collapse can lead to...

460

Conformational properties of polymers in anisotropic environments  

E-Print Network [OSTI]

We analyze the conformational properties of polymer macromolecules in solutions in presence of extended structural obstacles of (fractal) dimension $\\varepsilon_d$ causing the anisotropy of environment. Applying the pruned-enriched Rosenbluth method (PERM), we obtain numerical estimates for scaling exponents and universal shape parameters of polymers in such environments for a wide range $0<\\varepsilon_d<2$ in space dimension $d=3$. An analytical description of the model is developed within the des Cloizeaux direct polymer renormalization scheme. Both numerical and analytical studies qualitatively confirm the existence of two characteristic length scales of polymer chain in directions parallel and perpendicular to the extended defects.

K. Haydukivska; V. Blavatska

2014-07-11T23:59:59.000Z

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Polymer escape from a confining potential  

E-Print Network [OSTI]

The rate of escape of polymers from a two-dimensionally confining potential well has been evaluated using self-avoiding as well as ideal chain representations of varying length, up to 80 beads. Long timescale Langevin trajectories were calculated using the path integral hyperdynamics method to evaluate the escape rate. A minimum is found in the rate for self-avoiding polymers of intermediate length while the escape rate decreases monotonically with polymer length for ideal polymers. The increase in the rate for long, self-avoiding polymers is ascribed to crowding in the potential well which reduces the free energy escape barrier. An effective potential curve obtained using the centroid as an independent variable was evaluated by thermodynamic averaging and Kramers rate theory then applied to estimate the escape rate. While the qualitative features are well reproduced by this approach, it significantly overestimates the rate, especially for the longer polymers. The reason for this is illustrated by constructing a two-dimensional effective energy surface using the radius of gyration as well as the centroid as controlled variables. This shows that the description of a transition state dividing surface using only the centroid fails to confine the system to the region corresponding to the free energy barrier and this problem becomes more pronounced the longer the polymer is. A proper definition of a transition state for polymer escape needs to take into account the shape as well as the location of the polymer.

Harri Mökkönen; Timo Ikonen; Tapio Ala-Nissila; Hannes Jónsson

2015-03-26T23:59:59.000Z

462

Localized domain patterns in complex polymers  

E-Print Network [OSTI]

Localized domain patterns in complex polymers abstract. Block copolymers are macromolecules that can form variety of microstructures as a result of incomplete

463

ELECTROSPUN POLYMER-FIBER SOLAR CELL.  

E-Print Network [OSTI]

??A study of fabricating the first electrospun polymer-fiber solar cell with MEHPPV is presented. Motivation for the work and a brief history of solar cell… (more)

Nagata, Shinobu

2011-01-01T23:59:59.000Z

464

EFFECTS OF TRITIUM GAS EXPOSURE ON POLYMERS  

SciTech Connect (OSTI)

Effects of tritium gas exposure on various polymers have been studied over the last several years. Despite the deleterious effects of beta exposure on many material properties, structural polymers continued to be used in tritium systems. Improved understanding of the tritium effects will allow more resistant materials to be selected. Currently polymers find use mainly in tritium gas sealing applications (eg. valve stem tips, O-rings). Future uses being evaluated including polymeric based cracking of tritiated water, and polymer-based sensors of tritium.

Clark, E.; Fox, E.; Kane, M.; Staack, G.

2011-01-07T23:59:59.000Z

465

Conjugated Amplifying Polymers for Optical Sensing Applications  

E-Print Network [OSTI]

Thanks to their unique optical and electrochemical properties, conjugated polymers have attracted considerable attention over the last two decades and resulted in numerous technological innovations. In particular, their ...

Rochat, Sebastien

466

Semi-Crystalline Polymers Semi-crystalline polymers, such as polyethylene and polypropylene are common  

E-Print Network [OSTI]

Semi-Crystalline Polymers Semi-crystalline polymers, such as polyethylene and polypropylene are common commercial materials used for consumer products. Polyethylene is the most widely used polymer due and processing conditions. Equistar, in Cincinnati, is the largest producer of polyethylene in the US and P

Beaucage, Gregory

467

Porous coatings from wire mesh for bone implants  

DOE Patents [OSTI]

A method of coating areas of bone implant elements and the resulting implant having a porous coating are described. Preselected surface areas are covered by a preform made from continuous woven lengths of wire. The preform is compressed and heated to assure that diffusion bonding occurs between the wire surfaces and between the surface boundaries of the implant element and the wire surfaces in contact with it. Porosity is achieved by control of the resulting voids between the bonded wire portions.

Sump, Kenneth R. (Richland, WA)

1986-01-01T23:59:59.000Z

468

ENCAPSULATION OF PALLADIUM IN POROUS WALL HOLLOW GLASS MICROSPHERES  

SciTech Connect (OSTI)

A new encapsulation method was investigated in an attempt to develop an improved palladium packing material for hydrogen isotope separation. Porous wall hollow glass microspheres (PWHGMs) were produced by using a flame former, heat treating and acid leaching. The PWHGMs were then filled with palladium salt using a soak-and-dry process. The palladium salt was reduced at high temperature to leave palladium inside the microspheres.

Heung, L; George Wicks, G; Ray Schumacher, R

2008-04-09T23:59:59.000Z

469

Phase Diagram of Fully Developed Drainage in Porous Media  

SciTech Connect (OSTI)

Using concepts of invasion percolation in a gradient, we develop a phase diagram of fully developed drainage in porous media. The transition between stabilized displacement (where the conventional continuum applies) and fingering is controlled by the change of the sign of the gradient of the percolation probability (from stabilizing to destabilizing). The transition boundary is described by scaling laws. {copyright} {ital 1997} {ital The American Physical Society}

Yortsos, Y.C.; Xu, B. [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States)] [Petroleum Engineering Program, Department of Chemical Engineering, University of Southern California, Los Angeles, California 90089-1211 (United States); Salin, D. [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)] [Laboratoire Fluides, Automatique et Systemes Thermiques, Universite Paris VI and XI, associated with C.N.R.S. (URA 871), Batiment 502, Campus Universitaire, 91405 Orsay Cedex (France)

1997-12-01T23:59:59.000Z

470

Scaling of bubble growth in a porous medium. Topical report  

SciTech Connect (OSTI)

Processes involving liquid-to-gas phase change in porous media are routinely encountered, for example in the recovery of oil, geothermal processes, nuclear waste disposal or enhanced heat transfer. They involve diffusion (and convection) in the pore space, driven by an imposed supersaturation in pressure or temperature. Phase change proceeds by nucleation and phase growth. Depending on pore surface roughness, a number of nucleation centers exist, thus phase growth occurs from a multitude of clusters. Contrary to growth in the bulk or in a Hele-Shaw cell, however, growth patterns in porous media are disordered and not compact. As in immiscible displacements, they reflect the underlying pore microstructure. The competition between multiple clusters is also different from the bulk. For example, cluster growth may be controlled by a combination of diffusion (e.g. Laplace equation in the quasi-static case) with percolation. Novel growth patterns axe expected from this competition. While multiple cluster growth is important, the simpler problem of single-bubble growth is still not well understood. In this section, we focus on the growth of a single bubble, subject to a fixed far-field supersaturation (e.g. by lowering the pressure in a supersaturated solution or by raising the temperature in a. superheated liquid). Our emphasis is on deriving a scaling theory for growth at conditions of quasi-static diffusion, guided by recent experimental observations. Visualization of bubble growth in model porous media was recently conducted using 2-D etched-glass micromodels.

Satik, C.; Yortsos, Y.; Li, X. [Univ. of Southern California, Los Angeles, CA (United States). Dept. of Chemical Engineering

1995-07-01T23:59:59.000Z

471

Heat Transfer Study of Polymer Solutions with Different Rigidities  

E-Print Network [OSTI]

rigidities. A mathematic method was introduced to model the rigidity of polymer chain's effect on the dynamic viscosity of dilute polymer solution. Results were also obtained for the dilute polymer solutions under both hydro-dynamically developing and hydro...

Huang, Yao

2014-05-08T23:59:59.000Z

472

New Polymer Architectures for Imidazole Solvating groups, Anion...  

Broader source: Energy.gov (indexed) [DOE]

Polymer - Li Metalpolymer & Fuel Cells -High Temp PEM (150 0 C) Gel Polymer - Li Ion and Fuel Cell Li + Li + Li + X - X - X - Network Backbone may be polymer or inorganic. Free...

473

High-performance porous silicon solar cell development. Final report, October 1, 1993--September 30, 1995  

SciTech Connect (OSTI)

The goal of the program was to demonstrate use of porous silicon in new solar cell structures. Porous silicon technology has been developed at Spire for producing visible light-emitting diodes (LEDs). The major aspects that they have demonstrated are the following: porous silicon active layers have been made to show photovoltaic action; porous silicon surface layers can act as antireflection coatings to improve the performance of single-crystal silicon solar cells; and porous silicon surface layers can act as antireflection coatings on polycrystalline silicon solar cells. One problem with the use of porous silicon is to achieve good lateral conduction of electrons and holes through the material. This shows up in terms of poor blue response and photocurrents which increase with increasing reverse bias applied to the diode.

Maruska, P. [Spire Corp., Bedford, MA (United States)] [Spire Corp., Bedford, MA (United States)

1996-09-01T23:59:59.000Z

474

Structural study and phase transition investigation in a simple synthesis of porous architected-ZnO nanopowder  

SciTech Connect (OSTI)

In this work, zinc oxide powder with a rectangular-shaped porous architecture, made of numerous spherical nanometric particles, was obtained. A simple precipitation/decomposition procedure was used comprising a zinc oxalate intermediate, obtained from zinc sulfate and oxalic acid without any additives. Detailed studies on zinc oxalate dehydration, decomposition and zinc oxide formation, were carried out using in-situ temperature X-ray diffraction and thermogravimetric analysis. During the investigation, the temperature dependence of particle sizes, lattice parameters and crystal structures of ZnC{sub 2}O{sub 4}·2H{sub 2}O, ZnC{sub 2}O{sub 4} and ZnO nanopowders were analyzed from room temperature to 450 °C. Structural transitions were also discussed. The structure and morphology of the as-prepared ZnO nanopowder were investigated by electron microscopy and compared to the crystalline rectangular shape of ZnC{sub 2}O{sub 4}·2H{sub 2}O. The calcination temperature, counter ion and precipitate agent were found to be related to the product's shape and diameter. Spherical ZnO nanoparticles with diameters of less than 20 nm and a maximum specific surface of 53 m{sup 2}/g were obtained using this method. Highlights: • ZnO nanopowders with porous architecture were synthesized by a simple method. • Spherical ZnO nanoparticles confined in submicronic rectangular shape are obtained. • Crystal structures are determined temperature in-situ XRD up to 450 °C. • Structural transitions were analyzed.

Shang, C.; Barnabé, A., E-mail: barnabe@chimie.ups-tlse.fr

2013-12-15T23:59:59.000Z

475

Study of the simultaneous heat and mass transfer in two-dimensional porous media  

E-Print Network [OSTI]

in an unsaturated porous medium. A chronological discussion of the details of the review follows. Philip and De Vries[1] were the early investigators of the general topic of moisture migration in porous media with temperature gradients. The analysis revealed... for drying in a porous medium. The model accounted for the ca, pillary flow of the liquid phs, se and the diffusion of the vapor phase, including heat-conduction through the solid matrix. The coupled, non-linear governing equations, together...

Suh, Young Bae

1988-01-01T23:59:59.000Z

476

Modeling Cold Start in a Polymer-Electrolyte Fuel Cell  

E-Print Network [OSTI]

conditions used for fuel—cell simulations. 3.12 Values usedin Polymer Electrolyte Fuel Cells — II. Parametric Study,”of Polymer Electrolyte Fuel Cells,” Electrochimica Acta, 53,

Balliet, Ryan

2010-01-01T23:59:59.000Z

477

New Polymer Architectures for Imidazole Solvating groups, Anion...  

Broader source: Energy.gov (indexed) [DOE]

New Polymer Architectures for Imidazole Solvating groups, Anion Mobility and Flexibility New Polymer Architectures for Imidazole Solvating groups, Anion Mobility and Flexibility...

478

Controlled Self Assembly of Conjugated Polymer Containing Block Copolymers  

E-Print Network [OSTI]

in dye/polymer blend photovoltaic cells. Advanced MaterialsA. J. , Polymer Photovoltaic Cells - Enhanced Efficiencies2-Layer Organic Photovoltaic Cell. Applied Physics Letters

McCulloch, Bryan

2012-01-01T23:59:59.000Z

479

Development of a Low Cost Ultra Specular Advanced Polymer Film...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Development of a Low Cost Ultra Specular Advanced Polymer Film Solar Reflector Development of a Low Cost Ultra Specular Advanced Polymer Film Solar Reflector This presentation was...

480

High-Voltage Solid Polymer Batteries for Electric Drive Vehicles...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

High-Voltage Solid Polymer Batteries for Electric Drive Vehicles High-Voltage Solid Polymer Batteries for Electric Drive Vehicles 2012 DOE Hydrogen and Fuel Cells Program and...

Note: This page contains sample records for the topic "oxide polymer porous" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Fabrication and performance of polymer-nanocomposite anti-reflective...  

Office of Scientific and Technical Information (OSTI)

News, VA (United States) Design of polymer anti-reflective (AR) optical coatings for plastic substrates is challenging because polymers exhibit a relatively narrow range of...

482

Phosphate-Containing Polyethylene Glycol Polymers Prevent Lethal...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Phosphate-Containing Polyethylene Glycol Polymers Prevent Lethal Sepsis by Multidrug-Resistant Pathogens. Phosphate-Containing Polyethylene Glycol Polymers Prevent Lethal Sepsis by...

483

High-Voltage Solid Polymer Batteries for Electric Drive Vehicles...  

Broader source: Energy.gov (indexed) [DOE]

High-Voltage Solid Polymer Batteries for Electric Drive Vehicles High-Voltage Solid Polymer Batteries for Electric Drive Vehicles 2013 DOE Hydrogen and Fuel Cells Program and...

484

Development of Polymer Electrolytes for Advanced Lithium Batteries...  

Broader source: Energy.gov (indexed) [DOE]

Development of Polymer Electrolytes for Advanced Lithium Batteries Development of Polymer Electrolytes for Advanced Lithium Batteries 2013 DOE Hydrogen and Fuel Cells Program and...

485

azo dye polymer: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

alignment 10 Solvent-enhanced dye diffusion in polymer thin films for polymer light-emitting diode application Engineering Websites Summary: Solvent-enhanced dye diffusion in...

486

Structure-Function Relationships in Semiconducting Polymers for Organic Photovoltaics  

E-Print Network [OSTI]

properties for organic photovoltaics (OPVs). Space-chargePolymers for Organic Photovoltaics By David Fredric JoelPolymers for Organic Photovoltaics by David Fredric Joel

Kavulak, David Fredric Joel

2010-01-01T23:59:59.000Z

487

Self-Assembly of Polymer Nano-Elements on Sapphire  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Self-Assembly of Polymer Nano-Elements on Sapphire Print Self-assembly of polymers promises to vastly improve the properties and manufacturing processes of nanostructured...

488

E-Print Network 3.0 - anisotropic porous medium Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Mathematics Page: << < 1 2 3 4 5 > >> Page: << < 1 2 3 4 5 > >> 21 Generalized radiative transfer equation for porous medium upscaling: application to the radiative Fourier...

489

High Performance Computing linear algorithms for two-phase flow in porous media  

E-Print Network [OSTI]

High Performance Computing linear algorithms for two-phase flow in porous media Robert Eymard High Performance Computing techniques. This implies to handle the difficult problem of solving

Paris-Sud XI, Université de

490

Additive Manufacturing Methodology and System for Fabrication of Porous Structures with Functionally Graded Properties.  

E-Print Network [OSTI]

??The focus of this dissertation is on the development of an additive manufacturing system and methodology for fabricating structures with functionally graded porous internal properties… (more)

Vlasea, Mihaela

2014-01-01T23:59:59.000Z

491

Design and manipulation of 1-D rugate photonic crystals of porous silicon for chemical sensing applications  

E-Print Network [OSTI]

Porous Si Sensor on an Arduino Platform 311phototransistor sensor mounted on an Arduino microcontrollerscheme of the low-power Arduino-mounted sensor ..313

King, Brian Henry

2010-01-01T23:59:59.000Z

492

Interactions of Plasma-Generated Species on Porous Dielectric Thin Films  

E-Print Network [OSTI]

results in high interconnectivity of the pores, called “openleading to high pore interconnectivity and high diffusivity.porous-ULK has high pore interconnectivity, which allows for

Lee, Joe

2013-01-01T23:59:59.000Z

493

Transverserly Isotropic Saturated Porous Formations: II. Wave Propagation And Application To Multipole Logging  

E-Print Network [OSTI]

The wavefields generated by monopole and dipole sources in a fluid filled borehole embedded in multilayered transversely isotropic saturated porous formations are studied.

Schmitt, D. P.

1988-01-01T23:59:59.000Z

494

High temperature polymer concrete compositions  

DOE Patents [OSTI]

This invention is concerned with a polymer concrete composition, which is a two-component composition useful with many bases including metal. Component A, the aggregate composition, is broadly composed of silica, silica flour, portland cement, and acrylamide, whereas Component B, which is primarily vinyl and acrylyl reactive monomers, is a liquid system. A preferred formulation emphasizing the major necessary components is as follows: ______________________________________ Component A: Silica sand 60-77 wt. % Silica flour 5-10 wt. % Portland cement 15-25 wt. % Acrylamide 1-5 wt. % Component B: Styrene 50-60 wt. % Trimethylolpropane 35-40 wt. % trimethacrylate ______________________________________ and necessary initiators, accelerators, and surfactants.

Fontana, Jack J. (Shirley, NY); Reams, Walter (Shirley, NY)

1985-01-01T23:59:59.000Z

495

Synthesis and characterization of redox active polymers at surfaces  

SciTech Connect (OSTI)

Chapter 1. This chapter presents the basic elements of cyclic voltammetry of electroactive solution and surface confined species, surface attachment of siloxane reagents, the electrochemistry of quinones and viologens, and charge trapping phenomenon associated with molecular reagents confined at electrode surfaces. Chapter II. Electrochemical characterization of electrode-confined siloxane polymers (NQ-BV[sup 3+])[sub n] and (NQ-BV-BV[sup 5+])[sub n], derived from monomers which contain both napthoquinone (NQ) and benzyl viologen (BV[sup 2+]) subunits, is presented. Chapter III. The author reports the studies of chemical mechanisms for release of charge trapped in the pH-dependence rectifying polymers, (NQ-BV[sup 3+]/siloxane)[sub n] and (NQ-BV-BV[sup 5+]/siloxane)[sub n]. The polymers are derived from monomers which contain both naphthoquinone (NQ) and benzyl viologen (BV[sup 2+]) subunits. Particular to these types of surface confined homopolymers is the ability to trap charge at low pH in the form of reduced quinone. Chapter IV. A methylene linked chromophore-acceptor complex consisting of a rhenium tricarbonyl bipyridine chromophore and a benzylviologen acceptor, BV[sup 2+], were confined to a metal oxide surface via a trimethoxysilyl functional group at the BC[sup 2+] terminus. Photocurrent quantum yield was determined for irradiated electrodes derivatized with either the linked chromophore-acceptor complex, SRe(CO)[sub 3] [4-methyl-4'-[l brace]N-methyl-N'-(4 trimethoxysilyl phenylmethyl)-4,4'-bipyridinium[r brace]-2,2'-bipyridine][sup 2+] [Br[sup [minus

Palmore, G.T.R.

1992-01-01T23:59:59.000Z

496

Impact of solvents and supercritical CO{sub 2} drying on the morphology and structure of polymer-based biofilms  

SciTech Connect (OSTI)

In the present work, two-dimensional systems based on biodegradable polymers such as poly(?-caprolactone) (PCL), poly(ethylene oxide) (PEO) and polylactic acid (PLA) are fabricated by means of a sustainable approach which consists in inducing phase separation in solutions of such polymers and “green” solvents, namely ethyl lactate (EL) and ethyl acetate (EA). The extraction of the solvent is promoted by a controlled drying process, which is performed in either air or supercritical CO{sub 2}. The latter can indeed act as both an antisolvent, which favors the deposition of the polymer by forming a mixture with EL and EA, and a plasticizing agent, whose solvation and transport properties may considerably affect the microstructure and crystallinity of the polymer films. The morphological, topographical and crystalline properties of the films are tailored through a judicial selection of the materials and the processing conditions and assessed by means of thermal analyses, polarized optical microscopy, scanning electron microscopy and confocal interferometric microscopy. The results show that the morphological and crystalline properties of the films are strongly dependent on the choice of both the polymer/solvent system and the operating conditions during the drying step. In particular, the morphological, topographical and thermal properties of films prepared starting from highly crystalline polymers, namely PCL and PEO, are greatly affected by the crystallization of the material. Conversely, the less crystalline PLA forms almost completely amorphous films.

Causa, Andrea; Acierno, Domenico; Filippone, Giovanni [Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Universitŕ di Napoli Federico II, Piazzale V. Tecchio, 80, 80125 Napoli (Italy); Salerno, Aurelio; Domingo, Concepción [Instituto de Ciencia de Materiales de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra (Spain)

2014-05-15T23:59:59.000Z

497

Fuel cell electrolyte membrane with basic polymer  

DOE Patents [OSTI]

The present invention is an electrolyte membrane comprising an acid and a basic polymer, where the acid is a low-volatile acid that is fluorinated and is either oligomeric or non-polymeric, and where the basic polymer is protonated by the acid and is stable to hydrolysis.

Larson, James M.; Pham, Phat T.; Frey, Matthew H.; Hamrock, Steven J.; Haugen, Gregory M.; Lamanna, William M.

2012-12-04T23:59:59.000Z

498

Fuel cell electrolyte membrane with basic polymer  

DOE Patents [OSTI]

The present invention is an electrolyte membrane comprising an acid and a basic polymer, where the acid is a low-volatile acid that is fluorinated and is either oligomeric or non-polymeric, and where the basic polymer is protonated by the acid and is stable to hydrolysis.

Larson, James M. (Saint Paul, MN); Pham, Phat T. (Little Canada, MN); Frey, Matthew H. (Cottage Grove, MN); Hamrock, Steven J. (Stillwater, MN); Haugen, Gregory M. (Edina, MN); Lamanna, William M. (Stillwater, MN)

2010-11-23T23:59:59.000Z

499

Application of conducting polymers to electroanalysis  

SciTech Connect (OSTI)

Conducting polymers can be used as sensitive layers in chemical microsensors leading to new applications of theses devices. They offer the potential for developing material properties that are critical to the sensor sensitivity, selectivity and fabrication. The advantages and limitations of the use of thin polymer layers in electrochemical sensors are discussed.

Josowicz, M.A.

1994-04-01T23:59:59.000Z

500

Multicolored Electrochromism in Polymers: Structures and Devices  

E-Print Network [OSTI]

Multicolored Electrochromism in Polymers: Structures and Devices Avni A. Argun, Pierre-Henri Aubert May 12, 2004 A review of electrochromic (EC) polymers and their applications in absorption/transmission, reflective, and patterned electrochromic devices (ECDs) is presented. Fundamental properties of EC materials

Tanner, David B.