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

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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 ... continued below

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6 p. (0.2 MB)

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Park, H G; In, J; Kim, S; Fornasiero, F; Holt, J K; Grigoropoulos, C P et al. March 14, 2008.

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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.

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6 p. (0.2 MB)

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PDF-file: 6 pages; size: 0.2 Mbytes

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  • Presented at: Nanotech 2008, Boston, MA, United States, Jun 01 - Jun 05, 2008

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  • Report No.: LLNL-PROC-402431
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 945161
  • Archival Resource Key: ark:/67531/metadc900584

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  • March 14, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 12:12 p.m.

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Park, H G; In, J; Kim, S; Fornasiero, F; Holt, J K; Grigoropoulos, C P et al. A High-Flux, Flexible Membrane with Parylene-encapsulated Carbon Nanotubes, article, March 14, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc900584/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.