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Preparation and performance of polyethylene-based reverse osmosis membrane

Authors： ZHANG Cuimiao, DU Wenlin,LU Yanbing, KUANG Wu

Units： 1 Beijing Originwater Separation Membrane Technology Co., LTD, Beijing 101407, China;2 Beijing Originwater Membrane Technology CO., Ltd, Beijing 101407, China

KeyWords： polyethylene diaphragm；hydrophilic modification；interfacial polymerization reaction； reverse osmosis membrane

ClassificationCode：TQ051.893

year,volume(issue):pagination： 2024,44(3):57-66

Abstract：

Abstract: The structure and chemical properties of the bottom membrane have an important effect on the performance of reverse osmosis membrane. In this paper, the effect of three kinds of hydrophilic modification methods on the performance of reverse osmosis membrane after hydrophilic modification of PE bottom membrane was investigated. The flux and desalting rate of reverse osmosis membrane prepared by PE substrate without hydrophilic modification are poor, and the desalting layer is relatively thin, which is easy to have defects. The flux and desalting rate of the reverse osmosis membrane prepared by the hydrophilic modified PE bottom membrane were improved, but they were still lower than that of the traditional PSF bottom membrane. Due to the strong hydrophobicity of the PE bottom film and the large pore structure on the surface, not only a certain hydrophilic modification is required, but also the formation of a continuous water film liquid surface on the surface of the PE bottom film to form a continuous, complete and highly crosslinked polyamide desalination layer through the interfacial polymerization reaction.

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AuthorIntro：

张翠苗（1989-），女，河北石家庄人，硕士研究生，研究方向反渗透及纳滤膜材料开发

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