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Development of Defect-Free Asymmetric Polysulfone Membranes for gas separation using response surface methodology

Ismail, Ahmad Fauzi and Lai, P. Y. (2004) Development of Defect-Free Asymmetric Polysulfone Membranes for gas separation using response surface methodology. Separation and Purification Technology, 40 (2). pp. 191-207. ISSN 1383-5866

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Official URL: http://dx.doi.org/10.1016/j.seppur.2004.02.011

Abstract

This paper reports the preparation of defect-free asymmetric membranes through the manipulation of membrane fabrication variables, including polymer concentration, solvent ratio (ratio of less volatile solvent to more volatile solvent), forced-convective evaporation time and casting shear rate. Main effects and interaction effects of these variables on membrane structure and performance were investigated by using factorial design and response surface methodology in order to optimize membrane formation process. According to the results of this study, an essentially defect-free skin layer with skin thickness in the range of 6590–11330Å was prepared for asymmetric polysulfone membranes. Selectivity of these membranes was relatively higher as compared to conventional membranes; some of them even surpassed the intrinsic selectivity. Therefore, optimal processing conditions can be developed to prepare defect-free asymmetric membranes for gas separation.

Item Type:Article
Uncontrolled Keywords:asymmetric membrane, gas separation, polysulfone, phase inversion, factorial design
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Natural Resources Engineering (Formerly known)
ID Code:791
Deposited By: Pn Norazana Ibrahim
Deposited On:22 Feb 2007 05:39
Last Modified:22 Mar 2011 04:43

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