文献类型：期刊文献

英文题名：Surfactants intervened construction of NF membranes for lithium extraction in high Mg2+/Li+ ratio and high concentration environments

作者：Jia, Rui[1];Li, Hua-Xiang[4];Xu, Zhen-Liang[1,3];Jin, Xiao-Gang[1];Wu, Liu-Kun[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, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab,Sch Chem Engn, 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：2025

卷号：726

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20251418159101);WOS:【SCI-EXPANDED(收录号:WOS:001461634300001)】；

基金：The authors gratefully acknowledge for the financial support received from State Key R & D Program of China (2021YFB3801103 and 2021YFB3801101) and National Natural Science Foundation of China, China (22078092, 22208101, and 22078088) as well as the research funding provided by the Fundamental Research Funds for the Central Universities (JKA01241502) .

语种：英文

外文关键词：Nanofiltration membrane; Surfactant; Interfacial polymerization; Li+/Mg2+separation

摘要：Nanofiltration (NF) membranes offer notable benefits for Li+/Mg2+ separation, but their efficiency tends to diminish when exposed to mixed salt solutions with elevated Mg2+ concentrations or high Mg2+/Li+ ratios (MLR), restricting their practical applications. This study employed the surfactant-assisted interfacial polymerization (SIAIP) method to incorporate sodium dodecyl sulfate (SDS) and dodecyl phosphate (DDP), leading to the creation of two NF membranes with opposite surface charge characteristics. SDS promoted the trans-interfacial diffusion of the amine monomer while simultaneously limiting its escape from the bulk-phase solution, which was crucial for developing positively charged membranes. Conversely, DDP predominantly influenced the interfacial diffusion of the amine monomer, resulting in a membrane with a reduced pore size and a negatively charged active layer. SIAIP-DDP membranes exhibited excellent stability (S (Li, Mg) > 110) in environments with high MLR and Mg2+ concentrations, highlighting their potential for application in harsh salt-lake brine. This work presents a detailed mechanistic analysis of the surfactant-induced interfacial polymerization process, offering new insights into the efficient separation of Li+/Mg2+ under high MLR and high concentration conditions.