文献类型：期刊文献

英文题名：Estimation of phase separation temperatures for polyethersulfone/solvent/non-solvent systems in RTIPS and membrane properties

作者：Liu, Min[1];Liu, Sheng-Hui[2];Skov, Anne Ladegaard[3];Xu, Zhen-Liang[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Shanghai Key Lab Adv Polymer Mat,Key Lab Ultrafin, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]ECUST, Chem Engn Res Ctr, Membrane Sci & Engn R&D Lab, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Tech Univ Denmark, Danish Polymer Ctr, Dept Chem & Biochem Engn, Bldg 227, DK-2800 Lyngby, Denmark

年份：2018

卷号：556

起止页码：329

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20181705045943);WOS:【SCI-EXPANDED(收录号:WOS:000432587800033)】；

基金：The authors are thankful for the financial support of the China Scholarship Council and the National Natural Science Foundation of China (21306044).

语种：英文

外文关键词：Polyethersulfone; Membrane; Phase separation temperature; Reverse thermally induced phase separation

摘要：Phase separation temperature estimations, based on Hansen solubility parameters for poly(ethersulfone) (PES)/ solvent/non-solvent systems, were carried out to study the control of phase separation temperature in a reverse thermally induced phase separation (RTIPS) process. Four membrane-forming systems were studied, namely PES/N, N-dimethylacetamide (DMAc)/diethylene glycol (DEG), PES/DMAc/polyethylene glycol 200 (PEG200), PES/DMAc/PEG300 and PES/DMAc/PEG400. The effects of PES molecular weights, PES concentrations, PEG molecular weights and ratios of non-solvent/solvent on phase separation temperature are investigated, and the theoretical Hansen solubility parameter calculation is used to establish a prediction equation for phase separation temperature. A linear relationship between the experimental data and the difference in the solubility parameters between PES and the mixed solvent was observed. When the membrane-forming temperature was higher than the cloud point, membranes with a bi-continuous structure were acquired and showed a higher pure water permeation flux than that of membranes prepared with the non-solvent induced phase separation (NIPS) process. The pure water permeation flux and the mean pore size of membranes prepared with the RTIPS process decreased in line with an increase of PES molecular weight. When the membrane formation mechanism was the RTIPS process, the mechanical properties were better than those of the corresponding membranes prepared with the NIPS process.