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Title: A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes

Abstract

We present fabrication and characterization of a membrane based on carbon nanotubes (CNTs) and parylene. Carbon nanotubes have shown orders of magnitude enhancement in gas and water permeability compared to estimates generated by conventional theories [1, 2]. Large area membranes that exhibit flux enhancement characteristics of carbon nanotubes may provide an economical solution to a variety of technologies including water desalination [3] and gas sequestration [4]. We report a novel method of making carbon nanotube-based, robust membranes with large areas. A vertically aligned dense carbon nanotube array is infiltrated with parylene. Parylene polymer creates a pinhole free transparent film by exhibiting high surface conformity and excellent crevice penetration. Using this moisture-, chemical- and solvent-resistant polymer creates carbon nanotube membranes that promise to exhibit high stability and biocompatibility. CNT membranes are formed by releasing a free-standing film that consists of parylene-infiltrated CNTs, followed by CNT uncapping on both sides of the composite material. Thus fabricated membranes show flexibility and ductility due to the parylene matrix material, as well as high permeability attributed to embedded carbon nanotubes. These membranes have a potential for applications that may require high flux, flexibility and durability.

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
945161
Report Number(s):
LLNL-PROC-402431
TRN: US200902%%1261
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: Nanotech 2008, Boston, MA, United States, Jun 01 - Jun 05, 2008
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CARBON; COMPOSITE MATERIALS; DESALINATION; DUCTILITY; FABRICATION; FLEXIBILITY; MATRIX MATERIALS; MEMBRANES; MOISTURE; NANOTUBES; PERMEABILITY; POLYMERS; STABILITY; WATER

Citation Formats

Park, H G, In, J, Kim, S, Fornasiero, F, Holt, J K, Grigoropoulos, C P, Noy, A, and Bakajin, O. A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes. United States: N. p., 2008. Web.
Park, H G, In, J, Kim, S, Fornasiero, F, Holt, J K, Grigoropoulos, C P, Noy, A, & Bakajin, O. A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes. United States.
Park, H G, In, J, Kim, S, Fornasiero, F, Holt, J K, Grigoropoulos, C P, Noy, A, and Bakajin, O. Fri . "A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes". United States. https://www.osti.gov/servlets/purl/945161.
@article{osti_945161,
title = {A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes},
author = {Park, H G and In, J and Kim, S and Fornasiero, F and Holt, J K and Grigoropoulos, C P and Noy, A and Bakajin, O},
abstractNote = {We present fabrication and characterization of a membrane based on carbon nanotubes (CNTs) and parylene. Carbon nanotubes have shown orders of magnitude enhancement in gas and water permeability compared to estimates generated by conventional theories [1, 2]. Large area membranes that exhibit flux enhancement characteristics of carbon nanotubes may provide an economical solution to a variety of technologies including water desalination [3] and gas sequestration [4]. We report a novel method of making carbon nanotube-based, robust membranes with large areas. A vertically aligned dense carbon nanotube array is infiltrated with parylene. Parylene polymer creates a pinhole free transparent film by exhibiting high surface conformity and excellent crevice penetration. Using this moisture-, chemical- and solvent-resistant polymer creates carbon nanotube membranes that promise to exhibit high stability and biocompatibility. CNT membranes are formed by releasing a free-standing film that consists of parylene-infiltrated CNTs, followed by CNT uncapping on both sides of the composite material. Thus fabricated membranes show flexibility and ductility due to the parylene matrix material, as well as high permeability attributed to embedded carbon nanotubes. These membranes have a potential for applications that may require high flux, flexibility and durability.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {3}
}

Conference:
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