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The interface polymerized nanofiltration membrane with hydroxypropyl-β-cyclodextrin as aqueous monomer

Authors： Li Chun 1, Jia Mengmeng 1, Zhang Menglei 1, Ma Yuchen 1, Qin Zhenping 2, Liang Yucang 3, Guo Hongxia 1*

Units： 1. Faculty of Materials and Manufacturing, 2. Faculty of Environment and life, Beijing University of Technology, Beijing 100124, China, 3. b Institut für Anorganische Chemie, Eberhard Karls Universit?t Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany

KeyWords： nanofiltration membrane, hydroxypropyl-β-cyclodextrin, interfacial polymerization, permeability, chlorine resistance

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(6):118-125

Abstract：

The composite nanofiltration membrane with good chlorine resistance was prepared by interfacial polymerization on polysulfone (PSf) substrate membrane using hydroxypropyl-β-cyclodextrin (HP-β-CD) as aqueous phase, γ-aminopropyltriethoxysilane (KH-550) as additive and triformyl chloride (TMC) as organic phase. The surface chemical composition, morphology, structure and charges of the membranes were characterized by FTIR, SEM, AFM and zeta potential. The effect of KH-550 concentration on the separation performance as well as the chlorine tolerance of membranes was explored. The results showed that the optimal HP-β-CD-TMC/PSf membrane exhibited water contact angle of 69°with water permeabity of 70.7 L/m2·h·MPa, when the concentration of KH-550 is 0.15wt%, and the rejection rate of evans blue (EB), congo red (CR) and sodium lignosulfonate (SL) is more than 90% along with flux more than 54.5 L/m2·h·MPa. In addition, the membrane displayed an excellent chlorinea resistance after soaking in 10.0g/L NaClO for 200 hours.

Funds：

国家自然科学基金面上项目（21878003，22178007）；北工大国际科研合作种子基金项目

AuthorIntro：

李春（1997-）男，天津宝坻人，硕士研究生，研究方向为聚合物膜改性及性能研究。E-mail: chunl@emails.bjut.edu.cn。

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