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Hydrophilic modification of polysulfone membrane surface

Authors： Xu Tianyu,LiXipeng,Zhang Wei,Li Baoan

Units： 1. School of Chemcial Engineering and Technology, Tianjin University, 2. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300350, China, 3. State Key Laboratory of Chemical Engineering (Tianjin University), Tianjin 300350, China, 4. Tianjin Key Laboratory of Membrane Science and Desalination Technolog, Tianjin 300350, China

KeyWords： Hydrophilic; Membrane modification;Polysulfone;Dopamine;Nanospheric structure

ClassificationCode：O631

year,volume(issue):pagination： 2020,40(4):41-48

Abstract：

The hydrophilic nanofiltration membrane was successfully prepared by deposing the polydopamine(PDA) group on the surface of the polysulfone(PSF) membrane in tert-butyl hydrogen peroxide(TBHP)-dopamine(DA)-Trisbuffer solution. The wettability of modified membrane with different TBHP content and pH value was investigated, and the elemental composition, structure, morphology, wettability and stability of modified membrane surface of PSF was characterized by FTIR, XPS, water-oil contact angle measuring instrument, SEM, AFM, etc. The results manifested that, when pH=8.5 and the addition of TBHP was 800μL, the water contact angle of the modified PSF decreased from 52°to 13°,the oil contact angle increased from 142°to 165°thereby producing hydrophilicity membrane. What’s more, the pure water flux was increasing by 170.4%, going up to 91.3L/m2· h, and the rejection reached 90.7%. After ultrasonic shock, the water contact angle only decreased by 3.1° , showing good stability.

Funds：

国家自然科学基金“膜蒸馏海水脱盐过程中的膜污染机理研究”（21878218）；天津市科技重大专项与工程“基于可持续消除水体黑臭的技术集成与示范研究”（18ZXSZSF00030）

AuthorIntro：

第一作者简介：徐天玉（1994），女，辽宁省，无，硕士，硕士，疏水膜表面的亲水改性，E-mail：834176360@qq.com 通讯作者，E-mail：libaoan@tju.edu.cn

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