Densely Packed Vertically Aligned Carbon Nanotube-Polymer Composite Membrane Fabrication and Characterization for Selective Filtration of Liquids

Research Area: Volume 6,Issue 2, March 2017 Year: 2017
Type of Publication: Article Keywords: Polar And Non-Polar Liquid Filtration, Nano-Membranes, Vertically Aligned Carbon Nanotubes
  • Samarth Trivedi
  • Kamal Alameh
Journal: IJEIR Volume: 6
Number: 2 Pages: 114-119
Month: March
ISSN: 2277-5668
In this paper, the permeance of membranes based on the use of high-density Vertically-Aligned Carbon Nanotubes (VACNTs) in conjunction with Polydimethylsiloxane (PDMS), as filler material, are investigated for polar and non-polar liquids. Reactive ion etching is used to enhance the hydrodynamic flow properties of the VACNT membranes. Experimental results show that RIE treatment introduces hydroxyl ions (-OH) on the surface of the VACNT membranes, thus enhancing their gatekeeping activity and hydrophilicity simultaneously, and leading to an increase in flow rate for polar and non-polar liquids. The measured permeance improvement factors for water, ethanol, IPA, hexane and gasoline are 100%, 37.2%, 11.8%, 20.9% and 3.8%, respectively, with respect to Oxygen-plasma-treated VACNT membranes

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