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Title: Branched Aramid Nanofibers

Authors:
 [1]; ORCiD logo [2];  [3];  [3];  [3];  [3];  [3];  [3];  [4];  [5]; ORCiD logo [6]
  1. Department of Chemical Engineering, University of Michigan, Ann Arbor 48109 USA, School of Materials Science and Engineering, Nankai University, Tianjin 300350 China
  2. Department of Chemical Engineering, University of Michigan, Ann Arbor 48109 USA, Key Laboratory of Microsystems and Micronanostructures Manufacturing, Harbin Institute of Technology, Harbin 150080 China
  3. Department of Chemical Engineering, University of Michigan, Ann Arbor 48109 USA
  4. Department of Materials Science, University of Michigan, Ann Arbor 48109 USA
  5. Department of Materials Science, University of Michigan, Ann Arbor 48109 USA, Biointerfaces Institute, University of Michigan, Ann Arbor 48109 USA
  6. Department of Chemical Engineering, University of Michigan, Ann Arbor 48109 USA, Department of Materials Science, University of Michigan, Ann Arbor 48109 USA, Biointerfaces Institute, University of Michigan, Ann Arbor 48109 USA, Department of Biomedical Engineering, University of Michigan, Ann Arbor 48109 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1375530
Grant/Contract Number:
SC0000957
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Related Information: CHORUS Timestamp: 2017-10-20 15:33:24; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
Germany
Language:
English

Citation Formats

Zhu, Jian, Yang, Ming, Emre, Ahmet, Bahng, Joong Hwan, Xu, Lizhi, Yeom, Jihyeon, Yeom, Bongjun, Kim, Yoonseob, Johnson, Kyle, Green, Peter, and Kotov, Nicholas A. Branched Aramid Nanofibers. Germany: N. p., 2017. Web. doi:10.1002/anie.201703766.
Zhu, Jian, Yang, Ming, Emre, Ahmet, Bahng, Joong Hwan, Xu, Lizhi, Yeom, Jihyeon, Yeom, Bongjun, Kim, Yoonseob, Johnson, Kyle, Green, Peter, & Kotov, Nicholas A. Branched Aramid Nanofibers. Germany. doi:10.1002/anie.201703766.
Zhu, Jian, Yang, Ming, Emre, Ahmet, Bahng, Joong Hwan, Xu, Lizhi, Yeom, Jihyeon, Yeom, Bongjun, Kim, Yoonseob, Johnson, Kyle, Green, Peter, and Kotov, Nicholas A. 2017. "Branched Aramid Nanofibers". Germany. doi:10.1002/anie.201703766.
@article{osti_1375530,
title = {Branched Aramid Nanofibers},
author = {Zhu, Jian and Yang, Ming and Emre, Ahmet and Bahng, Joong Hwan and Xu, Lizhi and Yeom, Jihyeon and Yeom, Bongjun and Kim, Yoonseob and Johnson, Kyle and Green, Peter and Kotov, Nicholas A.},
abstractNote = {},
doi = {10.1002/anie.201703766},
journal = {Angewandte Chemie (International Edition)},
number = ,
volume = ,
place = {Germany},
year = 2017,
month = 7
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on August 18, 2018
Publisher's Accepted Manuscript

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  • Stable dispersions of nanofibers are virtually unknown for synthetic polymers. They can complement analogous dispersions of inorganic components, such as nanoparticles, nanowires, nanosheets, etc. as a fundamental component of a toolset for design of nanostructures and metamaterials via numerous solvent-based processing methods. As such, strong flexible polymeric nanofibers are very desirable for the effective utilization within composites of nanoscale inorganic components such as nanowires, carbon nanotubes, graphene, and others. Here stable dispersions of uniform high-aspect-ratio aramid nanofibers (ANFs) with diameters between 3 and 30 nm and up to 10 μm in length were successfully obtained. Unlike the traditional approaches basedmore » on polymerization of monomers, they are made by controlled dissolution of standard macroscale form of the aramid polymer, that is, well-known Kevlar threads, and revealed distinct morphological features similar to carbon nanotubes. ANFs are successfully processed into films using layer-by-layer (LBL) assembly as one of the potential methods of preparation of composites from ANFs. The resultant films are transparent and highly temperature resilient. They also display enhanced mechanical characteristics making ANF films highly desirable as protective coatings, ultrastrong membranes, as well as building blocks of other high performance materials in place of or in combination with carbon nanotubes.« less
  • This paper discusses the successful application of Aramid fiber-reinforced Torque Team Plus Joined Vbelts to low speed; (8-20 rpm) high torque, up to (320,000 in-lb); 100% belt driven oil field pumping units. Also discussed is a comparison in operating efficiency over gear or chain units, reduced initial expense, and lower overall maintenance effort. The Aramid reinforced Joined V-belts were applied to a double reduction drive (68-142:1 ratio) eliminating gear or chain reducers. Pumping units range in size from 57,000 in-lb to 320,000 in-lb.
  • This article describes a polytetrafluoroethylene/aramid packing for boiler feedwater pumps which has saved DuPont Company's Savannah River Plant over $2000/yr. Although the packing is more expensive than the material previously used, the one year minimal service life, compared to less than 8 weeks for the packing previously used, has already saved more than $2000, and the packing is still in service. The yellow packing is made of a chemical resistant aromatic polyamide (aramid) fiber that has high tensile strength and good thermal stability. A low friction coating of chemically inert Teflon PTFE and a non-silicone, temperature stable lubricating oil, aremore » applied to the individual fibers by a patented process before they are interbraided. The dimensionally stable packing can be used with fluids and slurries over a 1-13 pH range and at temperatures from -360 to 570/sup 0/F.« less