文献类型：期刊文献

英文题名：Modification of polysulfone hollow fiber ultrafiltration membranes using hyperbranched polyesters with different molecular weights

作者：Zhao, Long-Bao[1];Liu, Min[2];Xu, Zhen-Liang[1,2];Wei, Yong-Ming[1];Xu, Min-Xian[1];Jiang, Bang-He[3]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn Membrane Sci & Engn, R&D LabChem Engn Res Ctr, Shanghai 200237, Peoples R China;[2]ECUST, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat, Minist Educ,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Huachang Polymer LLC, Shanghai 200237, Peoples R China

年份：2015

卷号：26

期号：4

起止页码：353

外文期刊名：POLYMERS FOR ADVANCED TECHNOLOGIES

收录：;EI(收录号：20151000597581);WOS:【SCI-EXPANDED(收录号:WOS:000351472700010)】；

基金：The authors are thankful for the financial support received from the Key Technology R&D Program of Shanghai Committee of Science and Technology in China (13521102000), the Key Technology R&D Program of Jiangsu Committee of Science and Technology in China (BE2013031), and the National Natural Science Foundation of China (21306044).

语种：英文

外文关键词：polysulfone; hyperbranched polyester; ultrafiltration; hollow fiber membranes

摘要：A series of hyperbranched polyesters (HBPEs) using trimethylolpropane (TMP) as a core were synthesized via an esterification reaction, and the molecular weights of these HBPEs were 1600, 2260, 3370, and 5170g/mol, respectively. Then, these HBPEs were added into dope solutions to prepare PSf hollow fiber membranes via a wet-spinning method. When the HBPE molecule weight increased from 1600 to 5170g/mol, the initial viscosities of the PSf-HBPE-PEG400-DMAc dope solutions increased, and the shear-thinning phenomenon of these dope solutions became increasingly obvious. When these dope solutions were immersed into the deionized water, the demixing rate increased with an increase in the HBPE molecule weight at first and then decreased; this results in the increase of membrane porosity and the coexistence of finger-like and sponge-like structures. With the addition of HBPE, the start pure water contact angle and the mean effective pore size of the membranes decreased, and the J(w) increased. For the mechanical properties of the membranes, the breaking strength and the elongation of the membranes also increased. Copyright (c) 2015 John Wiley & Sons, Ltd.