文献类型：期刊文献

英文题名：Optimizing microstructure of polyelectrolyte ion exchange membrane for electrodialysis

作者：Cheng, Jin[1,2];Zhou, Weiyu[3];Zhu, Meifeng[3];Zhang, Zekai[1,2];Lu, Yijie[3];Chen, Yakun[3];Mu, Hongchun[1,2];Lian, Cheng[1,2];Liu, Honglai[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Frontiers Sci Ctr Materiobiol & Dynam Chem, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Int Elite Engn Sch, Shanghai 200237, Peoples R China

年份：2023

卷号：468

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20232214166183);WOS:【SCI-EXPANDED(收录号:WOS:001012574200001)】；

基金：This work was sponsored by the National Key R & amp; D Program of China (No. 2021YFB3801301) , the State Key Laboratory of Clean Energy Utilization (Open Fund Project No. ZJUCEU2021005) , the Fundamental Research Funds for the Central Universities (2022ZFJH004) , the National Natural Science Foundation of China (No. 22278127) and the Shanghai Rising-Star Program (No. 21QA1401900) . Cheng Jin thanks Ms. Zhang Man for her helpful discussion.

语种：英文

外文关键词：Polyelectrolyte multilayer membranes; Ion exchange membrane; Electrodialysis; Poisson-Nernst-Planck equations; Ion interception

摘要：In electrodialysis process, polyelectrolyte multilayer membranes (PEMMs) are introduced as a novel ion exchange membrane (IEM), as they can adjust different membrane structures according to the requirement. However, due to the influence of membrane structure on ion permeability and its mechanism have not been deeply studied, it is difficult to select the optimal structure under service conditions, resulting in low separation efficiency or increased energy consumption. Herein, a theoretical method is proposed to establish the structure-activity relationship of PEMMs, and then select the optimal membrane structure. The fixed charge was described by a specific trigonometric function to simulate the PEMMs. The effects of different membrane structures and charges on ion permeability and flux were studied by the modified Poisson-Nernst-Planck (MPNP) equations, and the competitive control relationship between the bilayers number and the charge density of each layer on the membrane performance was found. With our theoretical model, the selectivity and efficiency of PEMMs in electrodialysis can be comprehensively evaluated to guide its design and application.