文献类型：期刊文献

英文题名：Tuning roughness features of thin film composite polyamide membranes for simultaneously enhanced permeability, selectivity and anti-fouling performance

作者：Ma, Xiaohua[1];Yang, Zhe[2];Yao, Zhikan[2];Guo, Hao[2];Xu, Zhenliang[1];Tang, Chuyang Y.[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai Key Lab Multiphase Mat Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Univ Hong Kong, Dept Civil Engn, Pokfulam HW6198, Hong Kong, Peoples R China

年份：2019

卷号：540

起止页码：382

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20190406406546);WOS:【SCI-EXPANDED(收录号:WOS:000460710800041)】；

基金：The authors gratefully acknowledge the research funding provided by (1) Hong Kong Scholars Program (No. XJ2015015), (2) General Research Fund (Project 17207514) of the Research Grants Council of Hong Kong, (3) the Seed Fund for Strategic Interdisciplinary Research Scheme at the University of Hong Kong, (4) National Natural Science Foundation of China (21406060), (5) Fundamental Research Funds for the Central Universities (WA1514305) and (6) China Postdoctoral Science Foundation (2016M601527).

语种：英文

外文关键词：Roughness; TFC polyamide membrane; Permeability; Selectivity; Anti-fouling

摘要：Thin film composite (TFC) polyamide membranes set the golden standard for reverse osmosis technology, but tuning their permeability and selectivity remains a major challenge because of the inherent permeability-selectivity trade-off. Creating nano-sized voids within the polyamide rejection layer can tune the membrane roughness and increase its effective filtration area to improve the water permeability. Here we prepare nano-foamed polyamide rejection layers by adding sodium bicarbonate into the aqueous solution of amine monomers. We show a systematic evolution of the roughness structure of polyamide membranes, with increasingly leaf-like and belt-like features appearing under enhanced nano-foaming conditions. These nano-foamed features can result in remarkable improvements in both water permeability and salt rejection and reduce membrane fouling propensity at the same time. Our study paves a new research direction for designing future generation of desalination membranes, which holds vast potential to reduce the cost and energy consumption of desalination while achieving improved product water quality. (C) 2019 Elsevier Inc. All rights reserved.