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聚乙烯基材反渗透膜的制备及性能研究

作者：张翠苗，杜文林，卢彦斌，况武

单位： 1.北京碧水源分离膜科技有限公司，101407 ；2.北京碧水源膜科技有限公司,101407

关键词：聚乙烯隔膜、亲水改性、界面聚合反应、反渗透膜

DOI号：

分类号： TQ051.893

出版年,卷(期):页码： 2024,44(3):57-66

摘要：

基于底膜的结构和物化学性质对反渗透膜的性能有重要影响，本文探究了三类亲水改性方式对PE底膜亲水改性后的反渗透膜性能的影响。未经亲水改性的PE底膜所制备的反渗透膜通量和脱盐率均较差，脱盐层比较薄，极易存在缺陷。经过亲水改性的PE底膜所制备的反渗透膜通量和脱盐率均得到提升，但仍低于传统的PSF底膜所形成的反渗透膜。因为PE底膜强疏水性和表面大孔结构，不仅仅需要一定的亲水改性，还需要在PE底膜表面形成连续的水膜液面，才能通过界面聚合反应形成连续的、完整的、高交联度的聚酰胺脱盐层。

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.

基金项目：

作者简介：

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

参考文献：

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