文献类型：期刊文献

英文题名：Efficient separation of Li+/Mg2+via positively charged TFN membrane based on the PEI interlayer

作者：Jia, Rui[1];Wu, Liu-Kun[1];Xu, Zhen-Liang[1];Hedar, Mateen[1];Luo, Li-Han[1];Wu, Yu-Zhe[1];Li, Hua-Xiang[1];Tong, Yi-Hao[1];Xu, Sun-Jie[1]

机构：[1]East China Univ Sci & Technol, Shanghai Elect Chem Innovat Inst, Chem Engn Res Ctr,Sch Mat Sci & Engn, Sch Chem Engn,Membrane Sci & Engn R&D Lab,State Ke, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：284

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：;EI(收录号：20234815125114);WOS:【SCI-EXPANDED(收录号:WOS:001125044600001)】；

基金：The authors gratefully acknowledge the financial support from the National Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) and the National Natural Science Foundation of China, China (22078092, 22078088, and 22208101) as well as the research funding provided by the Fundamental Research Funds for the Central Universities (JKA01231522) .

语种：英文

外文关键词：Positively charged nanofiltration membranes; Thin-film nanocomposite membranes; Li+/Mg2+separation; NH2-MIL-101(Cr); Interlayer

摘要：Nanofiltration (NF) technology has exceptional mono/divalent ion separation performance, providing consid-erable application potential for lithium extraction. However, polymeric NF membranes provided only restricted amounts of practical applications since of their low permeability and limited selectivity. Herein, a positively charged membrane designed for Li+/Mg2+ separation was developed, this achievement was accomplished by incorporating NH2-MIL-101(Cr) nanoparticles (NPs) into the polyamide (PA) layer situated atop the poly-ethyleneimine (PEI) interlayer. The PEI interlayer controlled the amine monomer distribution, regulated the PA nanofilm morphology, and improved the membrane positively charged properties. Meanwhile, the NH2-MIL-101 (Cr) could provide Li+ with fast transport paths to further enhance the membrane Li+/Mg2+ separation capa-bility. The improved membrane possessed MgCl2 rejection of 96.1 %, LiCl rejection of 42.3 %, and Li+/Mg2+ separation factor of 102 with outstanding permeance of 17.0 L m-2 h-1 bar-1. This research made a valuable contribution to applying NF membranes in lithium extraction processes.