Porous cellulose acetate membrane prepared by thermally induced phase separation

Autor:	Shuji Nakatsuka, Masaaki Tearamoto, Kazuhiro Ohga, Hideto Matsuyama, Taisuke Maki
Rok vydání:	2003
Předmět:	Cloud point Materials science Polymers and Plastics Isotropy General Chemistry Microporous material Diluent Cellulose acetate Surfaces Coatings and Films chemistry.chemical_compound Membrane chemistry Chemical engineering Polymer chemistry Materials Chemistry Cellulose acetate membrane Porosity
Zdroj:	Journal of Applied Polymer Science. 89:3951-3955
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.12785
Popis:	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
Databáze:	OpenAIRE
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