CAJ | 학술논문

　　以聚醚砜(PES)/N,N-二甲基乙酰胺(DMAc)/一缩二乙二醇(DEG)低临界共溶温度(LCST)体系为铸膜液，利用低临界共溶温度(LCST)的热致相分离(LCST-TIPS，简称RTIPS)法制备了PES微孔膜。通过透光实验测试RTIPS过程的LCST，以扫描电镜、渗透和力学实验表征膜的形态和性能。研究了非溶剂/溶剂(DEG：DMAc)质量比和成膜水浴温度对PES膜结构和性能的影响。实验结果表明，随DEG：DMAc质量比增加，相分离温度降低；利用RTIPS技术抑制了膜断面指状孔的出现，形成表面有明显微孔和断面对称的双连续膜结构；DEG：DMAc质量比0.8：1，成膜水浴温度60℃，膜纯水通量和平均孔径最大；通过RTIPS机理所成膜综合力学性能优于非溶剂致相分离(NIPS)法所制备的膜。
　　이취미풍(PES)/N,N-이갑기을선알(DMAc)/일축이을이순(DEG)저림계공용온도(LCST)체계위주막액，이용저림계공용온도(LCST)적열치상분리(LCST-TIPS，간칭RTIPS)법제비료PES미공막。통과투광실험측시RTIPS과정적LCST，이소묘전경、삼투화역학실험표정막적형태화성능。연구료비용제/용제(DEG：DMAc)질량비화성막수욕온도대PES막결구화성능적영향。실험결과표명，수DEG：DMAc질량비증가，상분리온도강저；이용RTIPS기술억제료막단면지상공적출현，형성표면유명현미공화단면대칭적쌍련속막결구；DEG：DMAc질량비0.8：1，성막수욕온도60℃，막순수통량화평균공경최대；통과RTIPS궤리소성막종합역학성능우우비용제치상분리(NIPS)법소제비적막。
Microporous polyethersulfone (PES) membranes were successfully prepared by thermally induced phase separation method in which the employed membrane-forming system features a low critical solution temperature (LCST-TIPS, i.e. RTIPS) and consists of PES, N,N-dimethylacetamide (DMAc) and diethylene glycol (DEG). Light transmittance was performed to survey the LCST during the RTIPS process. The morphology and performance of the prepared PES membranes were respectively characterized with scanning electron microscopy, permeation and mechanical experiments. The effects of the mass ratios of nonsolvent/solvent (DEG:DMAc) and water bath temperature on membrane structure and properties were investigated. The results show that the phase separation temperature decreases with increasing mass ratio of DEG:DMAc. Using the RTIPS process, the membrane structure changes from a finger-like pores structure to a bicontinuous structure along its cross-section, and a porous surface was also observed. With the mass ratio of DEG:DMAc of 0.8:1 and the water bath temperature of 60℃, the membrane has the maximum mean pore size and pure water flux. Moreover, the mechanical properties of membranes prepared via the RTIPS are better than those of the membranes prepared by nonsolvent induced phase separation (NIPS) method.