膜科学与技术

杂萘联苯共聚醚砜复合正渗透膜的制备和性能

作者：刘鹏，张守海，王涛，丁蓉，王榛麟，蹇锡高

单位：大连理工大学化工学院高分子材料系，辽宁省高性能树脂工程技术研究中心，辽宁省高分子科学与工程重点实验室，辽宁大连，116024

关键词：杂萘联苯共聚醚砜；正渗透；中空纤维；复合膜；界面聚合

出版年,卷(期):页码： 2016,36(4):7-13

摘要：

以杂萘联苯共聚醚砜(PPBES)为膜材料制备中空纤维基膜，然后通过界面聚合方法在基膜内腔制备出一种新型聚酰胺复合正渗透中空纤维膜。分别考察了铸膜液组分和界面聚合工艺对复合正渗透膜结构和性能的影响。铸膜液中添加乙二醇会改变PPBES中空纤维基膜的结构和性能。PPBES基膜的结构和性能会影响聚酰胺活性层形貌和复合正渗透膜性能。间苯二胺（MPD）浓度会改变聚酰胺活性层的表面形貌，进而影响复合正渗透膜的性能。随着MPD浓度从0.5%升高到2%，复合膜水通量和盐水比都呈现快速下降趋势，但MPD浓度超过2%时，复合正渗透膜性能变化较小。随着原料液温度从25℃升高到80℃，正渗透膜水通量从20.3 L/m2h快速升高到34.0 L/m2h，而盐水比变化较小。新型PPBES复合正渗透中空纤维膜展现出较好的耐热稳定性。

Copoly(phthalazinone biphenyl ether sulfone) (PPBES) polymer were used as the membrane materials for the fabrication of hollow fiber substrate membranes. Novel polyamide composite forward osmosis (FO) hollow fiber membranes were fabricated via interfacial polymerization method on the lumen side of the substrate membranes. Effect of casting solution compositions and interfacial polymerization preparation techniques on the morphologies and performance of composite FO membranes was investigated, respectively. The addition of glycol in the casting solution changed the structures and performance of PPBES hollow fiber substrate membranes. The structures and performance of PPBES substrate membranes affected the morphologies of polyamide active layer and the performance of composite FO membranes. The surface morphologies of the polyamide active layer were altered with the change of MPD concentrations, which could affect the performance of composite FO membranes. The water flux and Js/Jv ratio of composite membranes decreased significantly when MPD concentration varied from 0.5% to 2%, and then changed slightly when the MPD concentration exceeded 2%. The water flux of FO membranes improved significantly from 20.3 L/m2h to 34.0 L/m2h without significant changes of Js/Jv ratio when the feed solution temperature increased from 25 °C to 80 °C. The novel composite FO membrane exhibited good thermal stability.

作者简介：刘鹏 (1987—)，男，山东省日照市人，博士研究生，主要从事正渗透膜材料的研究. * 通讯联系人：张守海教授zhangshh@dlut.edu.cn；蹇锡高教授jian4616@dlut.edu.cn。

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