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Fabrication of membranes for the liquid separation Part 2: Microfiltration membranes prepared from immiscible blends containing polysulfone and poly(1-vinylpyrrolidone-co-acrylonitrile) copolymers

Authors
Moon, EJKim, JWKim, CK
Issue Date
Apr-2006
Publisher
ELSEVIER SCIENCE BV
Keywords
polysulfone; poly(1-vinylpyrrolidone-co-acrylonitrile) copolymer; immiscible blend; microfiltration membrane; phase inversion method
Citation
JOURNAL OF MEMBRANE SCIENCE, v.274, no.1-2, pp 244 - 251
Pages
8
Journal Title
JOURNAL OF MEMBRANE SCIENCE
Volume
274
Number
1-2
Start Page
244
End Page
251
URI
https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/24371
DOI
10.1016/j.memsci.2005.08.017
ISSN
0376-7388
1873-3123
Abstract
In the previous research, ultratiltration membranes exhibiting excellent performance were produced from the miscible blends of polysulfone (PSf) and poly(1-vinylpyrrolidone-co-acrylonitrile) (P(VP-AN)) copolymers. PSf formed miscible blend with P(VP-AN) copolymers containing AN from 2 to 16 wt%, while other P(VP-AN) copolymers were not miscible with PSf. In this study, microfiltration membranes are prepared from immiscible blends of PSf and P(VP-AN) copolymers via traditional phase inversion process. Even though compatibility of PSf/P(VP-AN) blends depends on the AN content of copolymer, the average pore size existing on the membrane surface was about 0.25 mu m regardless of copolymer composition. These micropores stemmed from solvent-nonsolvent exchange channel formed at around the interface between PSf and P(VP-AN) when blends contain less than about 30 wt% of copolymer. Macropores (2 mu m) originated from the dispersed particles (or copolymer rich phase) was observed on the membrane surface along with micropores when the blend contained more than 40 wt% copolymers. (c) 2005 Elsevier B.V. All rights reserved.
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