Enhanced gas permeability by fabricating functionalized multi-walled carbon nanotubes and polyethersulfone nanocomposite membrane

Ge, Lei and Zhu, Zhonghua and Rudolph, Victor (2011) Enhanced gas permeability by fabricating functionalized multi-walled carbon nanotubes and polyethersulfone nanocomposite membrane. Separation and Purification Technology, 78 (1). pp. 76-82. ISSN 1383-5866

Abstract

Nanocomposite membranes consisting of 1-10 wt.% multi-walled carbon nanotubes (MWCNTs) embedded in polyethersulfone (PES) have been fabricated via phase inversion method by using N-methyl-2-pyrrolidone as solvent and their transportation properties are evaluated. The functional groups on MWCNTs, crystalline structure and MWCNTs dispersion were characterized by Fourier transform infrared spectroscopy, X-ray diffraction spectra, field emission scanning electron microscopy and transmission electron microscopy. The gas permeation fluxes of the derived nanocomposite membranes are increased by ∼67% without sacrificing selectivity at 5 wt.% MWCNTs introduced. According to diffusivity and solubility results derived from time lag method, the carboxyl groups on MWCNTs have stronger interaction with CO2, which can increase the solubility of polar gas and limit the solubility of non-polar gas, thus benefiting the CO2/N2 gas selectivity.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: No Faculty
Date Deposited: 25 May 2017 05:27
Last Modified: 30 May 2017 05:21
Uncontrolled Keywords: carboxyl groups; crystalline structure; diffusivities; field emission scanning electron microscopy; functionalized multi-walled carbon nanotubes; gas permeation; gas selectivity; gas separation; N-Methyl-2-pyrrolidone; nanocomposite membrane; nanocomposite membranes; non-polar; permselectivities; phase-inversion method; polyethersulfones; time lag; transportation properties; diffusion; field emission; field emission microscopes; fourier transform infrared spectroscopy; functional groups; gas permeability; gases; ionic liquids; multiwalled carbon nanotubes (MWCN); nanocomposites; scanning electron microscopy; solubility; transmission electron microscopy; X ray diffraction; gas permeable membranes
Fields of Research : 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies
Identification Number or DOI: 10.1016/j.seppur.2011.01.024
URI: http://eprints.usq.edu.au/id/eprint/31155

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