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Co-casting technique for fabricating dual-layer flat sheet membranes for gas separation

Hashemifard, S. A. and Ismail, Ahmad Fauzi and Matsuura, T. (2011) Co-casting technique for fabricating dual-layer flat sheet membranes for gas separation. Journal of Membrane Science, 375 (1-2). pp. 258-267. ISSN 0376-7388

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Official URL: http://dx.doi.org/10.1016/j.memsci.2011.03.053

Abstract

The present research investigated the feasibility of utilizing dual-layer flat sheet membranes for gas separation purpose. Polyetherimide (PEI) was used as top-layer (TL) and blending of polyetherimide and polysulfone (PSF) as sub-layer (SL) polymer matrixes. TL concentration, SL viscosity and SL PEI/PSF composition were chosen as the most important parameters to play with. To study the delamination/adhesion phenomena the PEI/PSF composition of SL was chosen as key-parameter. There was an optimum in the composition which by virtue the delamination phenomenon was suppressed hence guaranteed the TL/SL adhesion. FESEM images were interpreted by solubility analysis and permeation gas testing, and there was a good agreement between the membrane performance and the membrane morphologies. Dual-layer flat sheet membranes at PEI/PSF = 17.5/17.5-25/10, showed an enhancement in both permeance and selectivity. In conclusion, combination of incompatible polymer pairs will be a favourable choice to prepare the substrate membrane. Void spaces between the two incompatible polymers will enhance permeation rate of the substrate membrane, and consequently that of the composite membrane.

Item Type:Article
Uncontrolled Keywords:delamination, dual-layer flat sheet, gas separation, membrane, morphology
Subjects:Q Science
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:28860
Deposited By: Liza Porijo
Deposited On:29 Nov 2012 08:01
Last Modified:29 Nov 2012 08:01

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