Novel phase inversion process for symmetric membrane formation through thermal quenching of polymer solution in same solvent

doi:10.1002/app.42282

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/106332

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题名:	Novel phase inversion process for symmetric membrane formation through thermal quenching of polymer solution in same solvent
作者:	Cheng, Liao-ping
关键词:	crystallization;membranes;morphology;polyamides;porous materials
日期:	2015-04-18
上传时间:	2016-04-22 13:46:25 (UTC+8)
出版者:	John Wiley & Sons, Inc.
摘要:	A new and useful form of phase inversion for the formation of porous polymeric membranes is presented herein. As in the case of thermally induced phase separation (TIPS), this new form involves only two components (polymer and solvent) and a thermal quench; here the quench is accomplished via immersion in a cold bath of the micromolecular component (solvent) of the dope. In terms of a fixed-pressure two-component phase diagram the quench is a non-vertical one. We will refer to the new method as cold-solvent induced phase separation (CIPS). In the present work we study mainly the poly(ethylene-co-vinyl alcohol)/1,3-pro-panediol system which leads to bi-continuous structures stemming from a combination of liquid-liquid demixing and crystallization. In addition, we compare with the case of the Nylon-l2/formic acid system that we have briefly considered before and study further herein; the consequences of the TIPS to CIPS shift of method are different for the two systems, and the two situations are representative of two general possibilities. We also report general properties such as porosity, tensile strength, water permeation flux, and crystallinity of the produced poly(ethylene-co-vinyl alcohol) membranes.
關聯:	Journal of Applied Polymer Science 132(29),　42282
DOI:	10.1002/app.42282
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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