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Preparation of polyvinylamine/polysulfone composite hollow‐fiber membranes and their CO 2 /CH 4 separation performance
Author(s) -
Dong Chuanming,
Wang Zhi,
Yi Chunhai,
Wang Shichang
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.23342
Subject(s) - polysulfone , membrane , glutaraldehyde , permeation , ultrafiltration (renal) , selectivity , materials science , chemical engineering , polymer chemistry , composite number , fiber , sulfuric acid , thin film composite membrane , chromatography , chemistry , composite material , organic chemistry , catalysis , biochemistry , reverse osmosis , engineering , metallurgy
Fixed‐carrier composite hollow‐fiber membranes were prepared with polyvinylamine (PVAm) as the selective layer and a polysulfone ultrafiltration membrane as the substrate. The effects of the PVAm concentration in the coating solution, the number of coatings, and the crosslinking of glutaraldehyde and sulfuric acid on the CO 2 permeation rate and CO 2 /CH 4 selectivity of the composite membranes were investigated. As the PVAm concentration and the number of coatings increased, the CO 2 /CH 4 selectivity increased, but the CO 2 permeation rate decreased. The membranes crosslinked by glutaraldehyde or sulfuric acid possessed higher CO 2 /CH 4 selectivities but lower CO 2 permeation rates. For the pure feed gas, a composite hollow‐fiber membrane coated with a 2 wt % PVAm solution two times and then crosslinked with glutaraldehyde and an acid solution in sequence had a CO 2 permeation rate of 3.99 × 10 −6 cm 3 cm −2 s −1 cmHg −1 and an ideal CO 2 /CH 4 selectivity of 206 at a feed gas pressure of 96 cmHg and 298 K. The effect of time on the performance of the membranes was also investigated. The performance stability of the membranes was good during 6 days of testing. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1885–1891, 2006