文献类型：期刊文献

英文题名：Polyamide Nanofiltration Membranes with Enhanced Desalination and Antifouling Performance Enabled by Surface Grafting Polyquaternium-7

作者：Zhan, Zi-Ming[1];Zhang, Xin[1];Fang, Yin-Xin[1];Tang, Yong-Jian[1];Zhu, Ka-Ke[1];Ma, Xiao-Hua[1];Xu, Zhen-Liang[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Membrane Sci & Engn R&D Lab, Sch Chem Engn,State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2021

卷号：60

期号：39

起止页码：14297

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20214211034991);WOS:【SCI-EXPANDED(收录号:WOS:000706190000025)】；

基金：We acknowledge the funding by National Natural Science Foundation of China (21808060 and 22078092), the Open Project of State Key Laboratory of Chemical Engineering (SKLChE-21C03), and the Fundamental Research Funds for the Central Universities (JKA01211112).

语种：英文

外文关键词：Grafting (chemical) - Sodium alginate - Mammals - Water filtration - Acrylic monomers - Chlorine compounds - Amides - Nanofiltration membranes - Nanofiltration

摘要：Polyamide nanofiltration (NF) membranes with enhanced desalination and fouling resistance were fabricated via grafting N, N-dimethyl-N-2-propenyl-2- propene-1- ammonium chloride-2-propenamide (polyquaternium-7, PQ7), which consists of dimethyl diallyl ammonium chloride and acrylamide monomers. Compared to the control polyamide NF membrane, the PQ7-grafting membrane exhibited higher hydrophilicity, rougher membrane surface, and stronger positive charge. The surface grafting process had no distinct influence on membrane thickness. After modification, the water flux of the resulting membrane improved from 47.8 to 79.6 L m(-2) h(-1) under 5 bar, showing a significant improvement in permeability. Meanwhile, the rejection to divalent ions was elevated to a superior level due to the introduction of the positively charged quaternary ammonium groups from PQ7. Furthermore, the antifouling evaluation indicated that the modified polyamide NF membrane owed superior flux recovery capacity and fouling resistance to both sodium alginate solution and bovine serum albumin. Owing to the low cost of the surface modifier and facile grafting process, this strategy has wide application potential in fabricating superior NF membranes used for water softening.