文献类型：期刊文献

英文题名：Coupling heat curing and surface modification for the fabrication of high permselectivity polyamide nanofiltration membranes

作者：Zhan, Zi-Ming[1];Tang, Yong-Jian[1];Zhu, Ka-Ke[1];Xue, Shuang-Mei[2];Ji, Chen-Hao[2];Tang, Chuyang Y.[3];Xu, Zhen-Liang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Chem Engn Res Ctr, State Key Lab Chem Engn,Membrane Sci & Engn R&D L, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Shenzhen Univ, Inst Adv Study, Shenzhen 518060, Peoples R China;[3]Univ Hong Kong, Dept Civil Engn, Pokfulam, HW619B, Hong Kong, Peoples R China

年份：2021

卷号：623

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20210409812652);WOS:【SCI-EXPANDED(收录号:WOS:000619228500003)】；

基金：The authors greatly acknowledge the funding supported by National Natural Science Foundation of China (21808060) and Fundamental Research Funds for the Central Universities (222201814009, JKA012011001 and JKA012011017).

语种：英文

外文关键词：Membrane fabrication; Nanofiltration membrane; Surface modification; Interfacial polymerization; Thin-film composite membrane

摘要：Surface modification is an efficient post-treatment method to optimize the properties of nanofiltration (NF) membranes. Here, we report a facile surface modification strategy coupling with heat curing for grafting monoethanolamine (MEA), a monomer containing both a primary amine and a primary alcohol group, onto a nascent polyamide NF membrane. With grafting 0.5 wt% MEA at 50 degrees C, the pure water permeability of the polyamide NF membranes was improved from 7.9 to 19.5 L m(-2) h(-1) bar(-1) due to their enhanced physicochemical property, such as superior hydrophilicity, rough surface morphology, and enlarged membrane pores. Meanwhile, the rejection of Na2SO4 remained above 97.5%. More importantly, the optimal membrane modified with 0.5 wt% MEA exhibited a high Na2SO4 rejection of 99.1% and a negative NaCl rejection of -20.1% when treating a mixed salt solution containing 2 g/L Na2SO4 and 2 g/L NaCl. Our study provides a novel insight for the fabrication of high permselectivity NF membranes via surface modification.