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    题名: Novel Phase Inversion Process for Membrane Formation Through Thermal Quenching of Polymer Solution in Same Solvent
    作者: Chang, Hsu-Hsien;Yu, Hsuan-Fu;Lin, Dar-Jong;Wu, Yu-Hsuan;Cheng, Liao-Ping
    日期: 2013-08-09
    上传时间: 2016-08-18 13:40:11 (UTC+8)
    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. Ιn 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-propanediol 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: The International Membrane Conference in Taiwan 2013/The 12th Conference on Membrane Science and Technology, Proceedings, pp.127-129
    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] 會議論文

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