文献类型：期刊文献

英文题名：Surfactant-interlayer assisted interfacial polymerization for constructing Janus nanofiltration membranes: Enhanced Li+/Mg2+separation efficiency

作者：Jia, Rui[1];Jin, Xiao-Gang[1];Xu, Zhen-Liang[1,3];Wu, Liu-Kun[4];Tong, Yi-Hao[1];Li, Hua-Xiang[4];Ping, Hui-Hui[1];Ma, Xiao-Hua[1];Xu, Sun-Jie[2,3]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, Membrane Sci & Engn R&D Lab,State Key Lab Chem Eng, 130 MeiLong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Elect Chem Innovat Inst, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Smart Mfg Energy Chem Proc, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：712

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20243416923484);WOS:【SCI-EXPANDED(收录号:WOS:001301389700001)】；

基金：The authors express their sincere gratitude for the financial assis-tance granted by the Fundamental Research Funds for the Central Uni-versities (JKA01241502) , the National Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) , and the National Natural Science Foundation of China (22078092, 22078088, and 22208101) .

语种：英文

外文关键词：Janus structure; Nanofiltration membrane; Interfacial polymerization; Li+/Mg2+separation; Hyaluronic acid

摘要：Nanofiltration (NF) technology shows significant potential for lithium extraction, but the limited Mg2+ rejection of conventional negatively charged NF membranes constrains Li+/Mg2+ selectivity. This work proposed a surfactant-interlayer assisted interfacial polymerization (SIAIP) methodology to convert a traditional NF membrane into a Janus membrane featuring dual-electrical properties. Sodium dodecyl sulfate (SDS) restricted the IP reaction region and modulated the interfacial diffusion behavior of amine monomers. The hydrophilic and negatively charged hyaluronic acid (HA) interlayer modified the substrate, enhancing membrane permeability. Under the combined influence of SDS and HA, more amine monomers were stored and diffused to the reaction interface, transforming the membrane surface into a positively charged region and forming a Janus structure with the negatively charged interlayer. The optimal SIAIP membranes possessed a homogeneous pore size distribution, with a high selectivity (S Li, Mg) of 42.15 and superb permeability of 11.06 L m-2 h- 1 bar- 1. This investigation furnishes an innovative approach for developing high-efficiency Li+/Mg2+ separating NF membranes.