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Poly(vinylidene fluoride) Substrate-Supported PolyamidenMembrane for High-Temperature Water Nanofiltration 用于高温水纳滤的聚偏氟乙烯基支撑聚酰胺膜

Figshare Pub Date : 2022-05-03 DOI: 10.1021/acsapm.2c00277.s001

Jinyu Li (424996), Xuewu Zhu (6760661), Xiaoxiang Cheng (6760667), Jin Wang (29560), Weiwei Zhou (583665), Cunxian Lai (11751203), Daoji Wu (11751209), Feiyong Chen (12494672), Fengxun Tan (12494675), Heng Liang (813618)

{"title":"Poly(vinylidene fluoride) Substrate-Supported PolyamidenMembrane for High-Temperature Water Nanofiltration","authors":"Jinyu Li (424996), Xuewu Zhu (6760661), Xiaoxiang Cheng (6760667), Jin Wang (29560), Weiwei Zhou (583665), Cunxian Lai (11751203), Daoji Wu (11751209), Feiyong Chen (12494672), Fengxun Tan (12494675), Heng Liang (813618)","doi":"10.1021/acsapm.2c00277.s001","DOIUrl":"https://doi.org/10.1021/acsapm.2c00277.s001","url":null,"abstract":"Conventionalnpolysulfone and polyethersulfone membrane-supportednpolyamide (PA) nanofiltration (NF) membranes suffer an obvious performancendecline due to the drastic pore shrinkage of their membranes duringnhigh-temperature (HT) desalination processes. Herein, a thermallynstable PA NF membrane (PVDF-IP-2) was successfully constructed overna relatively hydrophobic polyvinylidene fluoride (PVDF) membrane usingna continuous interfacial polymerization (CIP) method. The PVDF-IP-2nmembrane had a moderate water permeance of 8.3 L m–2 h–1 bar–1 and a 99.7% Na2SO4 rejection at room temperature, which were comparablento those of commercial NF membranes. Introducing calcium ions (Ca2+) into the aqueous solutions further confined the transportnrate of the piperazine monomer across the reaction interface throughnthe coordination functions between Ca2+ and piperazinenmolecules, forming a high-flux (15.9 L m–2 h–1 bar–1 at room temperature) NF membranen(PVDF-IP-Ca) with an excellent Na2SO4 rejectionn(∼98.6%). Impressively, the PVDF-IP-Ca membrane presented annexcellent antifouling behavior and performance stability during bothnfouling and high-temperature filtration tests. The Ca2+-assisted IP (Ca–CIP) strategy is expected to be a facilenand universal approach to preparing TFC desalination membranes fornHT environmental applications on relatively hydrophobic supports.","PeriodicalId":522304,"journal":{"name":"Figshare","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147894864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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