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Preparation and Gas Separation Properties of Asymmetric Polysulfone Membranes by a Dual Bath Method

Wan-Jin Lee^† Deuk-San Kim Jin-Hwan Kim¹

Faculty of Applied Chemistry, College of Engineering, Chonnam National University, Kwangju 500-757, Korea ¹Department of Chemical Engineering, Chonnam National University, Kwangju 500-757, Korea

wjlee@chonnam.chonnam.ac.kr

Korean Journal of Chemical Engineering, March 2000, 17(2), 143-148(6), 10.1007/BF02707135

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Abstract

Defect-free skinned asymmetric gas separation membranes were prepared by a dual bath coagulation method that is a wet/wet phase inversion technique. The membranes were cast from a polysulfone/N,N-dimethyl-acetamide solution. In two sequent nonsolvent baths, the first bath using iso-propanol (IPA) leads to the formation of a dense skin top layer and the second bath using water makes the actual polymer precipitation. The top skin layer thickness was governed by changing the immersion time of the first IPA bath. We suggest that the growth rate of the skin layer is to be determined by a diffusion process.

Keywords

Defect-free Asymmetric Membranes Dual Bath Method Wet/Wet Phase Inversion Technique

References

Krantz WB, J. Membr. Sci., 29, 11 (1986)
Lai JY, J. Appl. Polym. Sci., 47, 1513 (1993)
Pesek SC, J. Membr. Sci., 81, 71 (1993)
Pinnau I, J. Appl. Polym. Sci., 43, 1491 (1991)
Sada E, J. Appl. Polym. Sci., 41, 2427 (1990)
Schell WJ, J. Membr. Sci., 22, 217 (1985)
Suzuki H, J. Membr. Sci., 146(1), 31 (1998)
van't Hof JA, J. Membr. Sci., 70, 17 (1992)
Yamasaki A, J. Membr. Sci., 123(1), 89 (1997)