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Preparation of polysulfone-based composite nanofiltration membrane by sulfonated dopamine-polyethylene imine co-deposition

Authors： HOU Bin，ZHAO Chenhui，ZHANG Jian, SU Wan，Zhang Wenjuan， CHENG Fang，CHANG Gaofeng, ZHANG Yufeng

Units： 1.Tianjin Key Laboratory of Water Quality Science and Technology, Tianjin Chengjian University, Tianjin300384, China; 2. State Key Laboratory of Membrane Separation and Membrane Process, Tiangong University, Tianjin 300387, China 3. Tianjin Academy of Eco-Environmental Sciences, Tianjin 300191, China

KeyWords： nanofiltration; sulfonated dopamine; polyethylene imine; co-deposition

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2022,42(3):91-96

Abstract：

Firstly, polydopamine (PDA) was sulfonated, then sulfonated dopamine (SDA) and polyethylene imine (PEI) were dissolved in Tris buffer, and finally, SDA-PEI/PSf composite nanofiltration membranes were obtained by co-deposition on the polysulfone (PSf) substrate membrane. The structure and properties of the membrane were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, zeta potential on the membrane surface, water contact Angle, and water desalination. The results show that the desalting rate of magnesium sulfate increases with the increase of deposition time and SDA concentration. The co-deposition layer of SDA-PEI was uniformly attached to the membrane surface, and the electronegativity of the membrane surface increased with the increase of SDA.

Funds：

国家科技重大专项课题（2017ZX07107-001-003）；国家重点研发计划（2017YFE0114200）；天津市科技重大专项与工程计划（17ZXSTSF00040）

AuthorIntro：

侯斌（1996-），男，山西吕梁人，从事膜改性与水处理技术的方向研究

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