文献类型：期刊文献

英文题名：Structure and Properties of PSf Hollow Fiber Membranes with Different Molecular Weight Hyperbranched Polyester Using Pentaerythritol as Core

作者：Liu, Min[1];Zhao, Long-Bao[2];Yu, Li-Yun[3];Wei, Yong-Ming[2];Xu, Zhen-Liang[1,2]

机构：[1]ECUST, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Shanghai Key Lab Adv Polymer Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]ECUST, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab, Chem Engn Res Ctr, 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：2020

卷号：12

期号：2

外文期刊名：POLYMERS

收录：;EI(收录号：20201108299185);WOS:【SCI-EXPANDED(收录号:WOS:000519849800133)】；

基金：This work was supported by the National Natural Science Foundation of China (21306044 and 21978082).

语种：英文

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

摘要：A homologous series of hyperbranched polyesters (HBPEs) was successfully synthesized via an esterification reaction of 2,2-bis(methylol)propionic acid (bis-MPA) with pentaerythritol. The molecular weights of the HBPEs were 2160, 2660, 4150 and 5840 g/mol, respectively. These HBPEs were used as additives to prepare polysulfone (PSf) hollow fiber membranes via non-solvent induced phase separation. The characteristic behaviors of the casting solution were investigated, as well as the morphologies, hydrophilicity and mechanical properties of the PSf membranes. The results showed that the initial viscosities of the casting solutions were increased, and the shear-thinning phenomenon became increasingly obvious. The demixing rate first increased and then decreased when increasing the HBPE molecular weight, and the turning point was 2660 g/mol. The PSf hollow fiber membranes with different molecular weights of HBPEs had a co-existing morphology of double finger-like and sponge-like structures. The starting pure water contact angle decreased obviously, and the mechanical properties improved.