Zwitterions coated hollow fiber membranes with enhanced antifouling properties for osmotic power generation from municipal wastewater 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Water research: A journal of the international water association
年/卷/期
2016 / 104 / Nov.1
页码
389-396
ISSN号
0043-1354
作者单位
Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore 117585, Singapore;
作者
Zhao, Dieling;Qiu, Guanglei;Li, Xue;Wan, Chunfeng;Lu, Kangjia;Chung, Tai-Shung;
摘要
Fouling on pressure-retarded osmosis (PRO) membranes leads to severe declines in water flux and power density because their porous substrates are facing the wastewater feed. Thus, inorganics, organics and microorganisms in the wastewater are prone to depositing on the substrate surface and even in its pores. In order to reduce the fouling propensity, coating the substrate surface of PRO membranes with zwitterionic materials proves to be an effective way. In this work, 2-methacryloyloxyethylphosphorylcholine (MPC), is modified and grafted onto the polydopamine (PDA) coated poly (ether sulfone) (PES) hollow fiber substrate. Both the synthesis and surface coating of MPC are easy and facile to be scaled up. Compared with the pristine PES and PES-PDA substrates, the MPC modified substrate (PES-PDA-MPC) exhibits high resistance to protein adsorption as well as bacteria adhesion. By using a state-of-the-art thin-film composite poly (ether sulfone) (TFC-PES) hollow fiber membrane as the control for power generation, the power density of the TFC-PES-PDA-MPC membrane can achieve as high as 7.7 W/m(2) while the unmodified one has only 6.0 W/m(2) after 3 h's PRO tests. In conclusion, the osmotic power generation of PRO membranes can be significantly sustained by modifying the membrane surface with zwitterions. (C) 2016 Elsevier Ltd. All rights reserved.
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关键词/主题词
Poly(ether sulfone);Pressure-retarded osmosis;Thin-film composite membranes;Anti-fouling;Zwitterion;Osmotic power;
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