文献类型：期刊文献

英文题名：The effect of diamine structure on the chemical stability of polyamide nanofiltration membranes: Experimental and density functional theory studies

作者：Miao, Meng-Han[1];Qiu, Jin-Kai[1,2];Xu, Zhen-Liang[1];Lian, Cheng[1,2];Liu, Hong-Lai[1,2];Li, Jia-Hui[1,2];Tang, Yong-Jian[1]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, Sch Chem Engn, State Key Lab Chem Engn,Membrane Sci & Engn R&D La, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：687

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20233814745107);WOS:【SCI-EXPANDED(收录号:WOS:001077700800001)】；

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) .

语种：英文

外文关键词：Nanofiltration; Interfacial polymerization; Monomer structure; Chemical stability

摘要：Monomers are elementary units that constitute the polyamide layer, which determines the properties of nano-filtration membranes. The design of nanofiltration membranes with both high separation performance and outstanding chemical stability remains a challenge. In this study, two typical monomers, heterocyclic monomer molecule-piperazine (PIP) and carbon ring molecule-1,4-cyclohexane diamine (CHDA), were applied as aqueous monomers for interfacial polymerization to generate polyamide nanofiltration membranes. The physicochemical properties of the two nanofiltration membranes were comprehensively investigated. The results demonstrated that the nanofiltration membrane fabricated via CHDA exhibited more chemical stability than that fabricated via PIP. The mechanisms influencing the chemical stability difference were elucidated via multiscale simulation. The CHDA polyamide has higher levels of HOMO-LUMO energy and Gibbs-free energy, which make it more stable under harsh chemical environments. Overall, this work presents the effect of the diamine structure on the chemical stability of polyamide NF membranes, which can inspire highly chemically stable nanofiltration membrane fabrication.