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UV-driven superhydrophilic membrane preparation and its application in oil/water separation
Authors: CHENG Cong,YANG Ziyun,ZHAO Boyuan, LIU Qiaohong, YE Qing, An Quanfu
Units: Beijing University of Technology, Facility of Environmental and Life Science, Beijing, 100124
KeyWords: oil water separation, superhydrophilic, zwitterionic polymer, benzophenone, covalent cross-linking
ClassificationCode:TQ 28
year,volume(issue):pagination: 2022,42(6):101-109

Abstract:
 In the process of treating oil wastewater with membrane separation, the oil fouling is the key problem restrict the application. The hydrophilic modification of the membrane surface is an effective strategy to improve the separation efficiency and reduce the oil adsorption. In this study, a copolymer containing 2-methacryloyloxymethylmethyroside (MPC) was covalently crosslinked to the membrane surface using the characteristics of benzophenone photo crosslinking reaction, which greatly improves the surface hydrophilicity of the membrane and ensure the stability of the hydrophilic layer. The modified membrane showed superhydrophilic properties, the pure water flux could be increased to 4.7×104 L / (m2h), and the flux recovery rate was increased from 90.0% to 99.8%. At the same time, due to the stable covalent grafting between the membrane material and the zwitterionic polymer, the hydrophilicity of the membrane surface was maintained after cleaning with strong acids and bases. This work may provide a new strategy for the stable hydrophilic modification of membrane surfaces. 

Funds:
项目来源“省部共建分离膜与膜过程国家重点实验室(天津工业大学)开放课题(M202106)”。

AuthorIntro:
陈聪(1996-),女,山东省聊城市人,硕士研究生,主要从事膜材料的改性与制备研究

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