热致相分离法制备聚合物微孔膜的研究进展

Progress in preparation of polymer microporous membrane via thermally induced phase separation

热致相分离(TIPS)是制备聚合物微孔膜的重要方法,自发明以来一直是膜技术研究领域的热点。近年来,随着人们对其研究的深入,针对其原有的缺点进行了改进。主要体现在:(1)将TIPS与其它制膜方法(例如非溶剂致相分离法、拉伸法、超临界二氧化碳法)相结合,进行制备方法的改进;(2)通过使用亲水本体材料或添加两亲共聚物,在制膜同时实现膜的亲水改性;(3)材料由结晶聚合物拓展到无定型聚合物,扩大了TIPS制膜的选材范围。就以上方面,综述了当前TIPS制备聚合物微孔膜研究领域的新进展。

Thermally induced phase separation（TIPS） is an important approach to prepare polymer microporous membrane.Since it was invented,it has always been the hotspot in the research field of membrane technology.In recent years,tremendous efforts have been made to overcome its original shortcomings.Firstly,it is combined with other formation methods,including nonsolvent induced phase separation,stretching,supercritical carbon dioxide method and so on.Secondly,hydrophilic polymer and amphipathic additives are used in TIPS so as to improve its hydrophilicity.Thirdly,the selection scope of new polymer material is expanded from crystalline polymer to amorphous polymer.In this article,this new trend in preparing polymer microporous membrane via TIPS is reviewed.