文献类型：期刊文献

英文题名：Preparation of MWCNT@ZIF-L Composites Through In Situ Growth Method and Their Incorporation into CS-PVA Membrane for Pervaporation Desalination

作者：Yuan, Haikuan[1];Chen, Xinyi[1];Cheng, Liang[2];Cai, Zimu[3];Li, Rui[1];Yan, Qingyu[1];Lu, Jie[1]

机构：[1]Shanghai Univ Engn Sci, Sch Chem & Chem Engn, Shanghai 201620, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Shanghai Univ, Sch Environm & Chem Engn, Shanghai 200444, Peoples R China

年份：2025

卷号：10

期号：40

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001599723600001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 92156020) and the Shanghai Natural Science Foundation (No. 25ZR1401151).

语种：英文

外文关键词：Desalination; Mixed-matrix membrane; MOF; MWCNT@ZIF-L; Pervaporation

摘要：In order to prepare high-performance pervaporation membrane for desalination, multi-walled carbon nanotube (MWCNT) was introduced into ZIF-L, and MWCNT@ZIF-L composite was prepared through in situ growth method. MWCNT@ZIF-L/chitosan (CS)-polyvinyl alcohol (PVA) composite membrane was prepared by coating method using MWCNT@ZIF-L as fillers, CS-PVA (mass ratio of 8:2) as polymer matrixes and polyacrylonitrile (PAN) membrane as substrate. MWCNT@ZIF-L composites and MWCNT@ZIF-L/CS-PVA membranes were characterized by SEM, FT-IR, XRD, XPS and water contact angle. MWCNT-COOH provided the nucleation sites and introduced the hydrophilic groups for the formation of ZIF-L blade structure. MWCNT@ZIF-L enhanced the hydrophilicity and anti-swelling ability for membrane. A small MWCNT amount did not cause obvious change in morphology of ZIF-L, but a large MWCNT amount was detrimental to the molding of ZIF-L blade structure. The application of composite membrane in pervaporation desalination was explored. The incorporation of MWCNT@ZIF-L into polymers brought the more water transport channels and hydrophilic groups, which improved the water flux of membrane without reducing the rejection to salt ions. MWCNT@ZIF-L/CS-PVA composite membrane loaded with 1.5 wt% MWCNT@ZIF-L (1:20) achieved a water flux of 19.8 kgm-2h-1 and rejection of 99.98%in a NaCl aqueous solution (3.5 wt%) at 35 degrees C, which was 3.3 times higher than that of CS-PVA membrane.