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Porous cellulose acetate membrane prepared by thermally induced phase separation
Author(s) -
Matsuyama Hideto,
Ohga Kazuhiro,
Maki Taisuke,
Tearamoto Masaaki,
Nakatsuka Shuji
Publication year - 2003
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.12785
Subject(s) - diluent , microporous material , cellulose acetate , materials science , chemical engineering , membrane , porosity , gas separation , polymer chemistry , cellulose , polymer , phase (matter) , isotropy , methyl cellulose , chromatography , composite material , organic chemistry , chemistry , biochemistry , physics , quantum mechanics , engineering
Microporous cellulose acetate membranes were prepared by a thermally induced phase separation (TIPS) process. Two kinds of cellulose acetate with acetyl content of 51 and 55 mol % and two kinds of diluents, such as 2‐methyl‐2,4‐pentandiol and 2‐ethyl‐1,3‐hexanediol, were used. In all polymer‐diluent systems, cloud points were observed, which indicated that liquid–liquid phase separation occurred during the TIPS process. The growth of droplets formed after the phase separation was followed using three cooling conditions. The obtained pore structure was isotropic, that is, the pore size did not vary across the membrane. In addition, no macrovoids were formed. These pore structures were in contrast with those usually obtained by the immersion precipitation method. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3951–3955, 2003