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Study on performance of thin-film composite membrane prepared by electrospray-assisted crosslinking method

Authors： ZHANG Shengning, ZHANG Hao, HUANG Zhihao, LIU Weiliang, LI Wenxuan, MA Xiaohua

Units： State Key Laboratory of Chemical Engineering, Membrane Science and Engineering R&D Lab, East China University of Science and Technology, Shanghai 200237, China

KeyWords： electrospray; crosslinking; polyethyleneimine; thin-film composite membrane; dye removal

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2021,41(3):29-36

Abstract：

In this paper, a thin-film polyethyleneimine (PEI)/glutaraldehyde (GA) composite membrane was prepared through electrospray-assisted crosslinking method. The effects of PEI concentration and electrospray time on the physical and chemical properties and separation performance of the PEI/GA composite membrane were studied. The microscopic morphology, crosslinking reaction, hydrophilicity and chargeability of the composite membrane were characterized by SEM, AFM, FTIR, contact angle and Zeta potential. The separation performance of the composite membrane was tested by using cationic dyes through a cross-flow device. The results showed that the positively charged PEI/GA composite membrane with uniform and compact surface, small roughness, and significantly improved hydrophilicity was successfully prepared through the electrospray-assisted crosslinking method. The rejection for the cationic dyes methylene blue (MLB) and crystal violet (CV) reached 95.1% and 97.5%, respectively. By changing the PEI concentration and electrospray time, the separation performance of the composite membrane can be effectively controlled to meet the needs of a wider range of applications

Funds：

国家自然科学基金(21978081)

AuthorIntro：

张晟宁(1996-)，男，上海人，硕士研究生，研究方向为纳滤膜的制备与改性

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