Stabilization of composite hollow fiber nanofiltration membranes with a sulfonated poly(ether ether ketone) coating

被引：29

作者：

Song, Jianfeng ^{[1
]}

Li, Xue-Mei ^{[1
]}

Li, Zhansheng ^{[2
]}

Zhang, Mengxi ^{[1
]}

Yin, Yong ^{[1
]}

Zhao, Baolong ^{[1
]}

Kong, Dingfeng ^{[1
]}

Chen, Gang ^{[1
]}

He, Tao ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Adv Res Inst, Lab Membrane Mat & Separat Technol, Shanghai 201210, Peoples R China

[2] Dalian Univ Technol, Dept Polymer, Coll Chem Engn, Dalian 116024, Peoples R China

来源：

DESALINATION | 2015年 / 355卷

基金：

中国国家自然科学基金;

关键词：

Nanofiltration; Sulfonated poly(ether ether ketone); Cross-linking; Reptation; Stability; PROTON-CONDUCTING MEMBRANES; PERVAPORATION SEPARATION; REVERSE-OSMOSIS; PERFORMANCE; POLYMER; SPEEK; ULTRAFILTRATION; STABILITY; MIXTURES; WATER;

D O I：

10.1016/j.desal.2014.10.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Composite hollow fiber nanofiltration membrane coated with a thin layer of sulfonated poly( ether ether ketone) (SPEEK) can separate monovalent ions from multivalent ions with a low energy demand. It has found applications in desalination of glyphosate wastewater and removal of arsenic from drinking water. Before large scale application of such membranes, one of the main issues is the long time performance stability. This paper reports, for the first time, systematic investigations on the origins of the instability of the SPEEK composite membrane in aqueous phase. Membrane preparation parameters, the coating polymer concentration, the coating time, and the post-treatment temperature were correlated to the membrane stability. A reptation mechanism was proposed to explain the rejection decline and flux increase with time, based on swelling and dissolution of SPEEK. To reduce the swelling and loss of SPEEK, a PVA/SPEEK blend was used as the coating layer, which after cross-linking by glutaraldehyde, yielded a NF membrane with constant rejection during 2000 h of operation. (C)2014 Elsevier B.V. All rights reserved.

引用

页码：83 / 90

页数：8

共 33 条

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