文献类型：期刊文献

英文题名：Can the mix-charged NF membrane directly obtained by the interfacial polymerization of PIP and TMC?

作者：Zhu, Qiu-Yu[1];Xu, Zi-Yun[1];Fu, Jie-Han[1];Huang, Jie[1];Xu, Zhen-Liang[1];Tong, Min[2];Li, En-Chao[2];Tang, Yong-Jian[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, State Key Lab Chem Engn, Sch Chem Engn,Membrane Sci & Engn R&D Lab, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Baowu Water Technol Co Ltd, Res Inst, Shanghai 201999, Peoples R China

年份：2023

卷号：558

外文期刊名：DESALINATION

收录：;EI(收录号：20231714012200);WOS:【SCI-EXPANDED(收录号:WOS:000988727200001)】；

基金：The authors are thankful for the funding support provided by the State Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) and the National Natural Science Foundation of China (21808060) , and Entrepreneurship of East China University of Science and Technology (X202210251002) .

语种：英文

外文关键词：Nanofiltration; Interfacial polymerization; Mix -charged; Mono -; divalent ions separation

摘要：Currently, most nanofiltration membranes exhibit satisfactory separation performance on the anions or cations, and few membranes could concurrently separate anion and cation. Therefore, preparing nanofiltration mem-branes with excellent separation performance for both anionic and cationic ions remains a challenge. Herein, we have developed a series of nanofiltration membranes using conventional interfacial polymerization with different ratios of trimesoyl chloride (TMC) and piperazine (PIP) concentrations. In the interface polymerization process, the amine groups carried by PIP imparted a positive charge, while the hydrolysis of acyl chloride groups resulted in the generation of carboxylic acid groups that introduced a negative charge. The mix-charged nanofiltration membrane could be fabricated by varying PIP/TMC concentration ratios. The optimized membrane exhibited high rejection rates for bivalent ions (Na2SO4 rejection of 96.6 %, MgCl2 rejection of 93.0 %), and its selectivity for Mg2+/Li+ mixed solution was improved significantly. This work provides a novel approach for the devel-opment of nanofiltration membranes capable of effectively separating mono-/divalent ions.