文献类型：期刊文献

英文题名：RO membrane fabricated via a facile modified heat-treating strategy for high-flux desalination

作者：Li, Lan-Qian[1];Zhan, Zi-Ming[1];Huang, Ben-Qing[1];Xue, Shuang-Mei[1];Ji, Chen-Hao[1];Wang, Rui-Zhe[1];Tang, Yong-Jian[1];Xu, Zhen-Liang[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Membrane Sci & Engn R&D Lab, State Key Lab Chem Engn,Chem Engn Res Ctr, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2020

卷号：614

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20203309059530);WOS:【SCI-EXPANDED(收录号:WOS:000567422100005)】；

基金：The financial support was provided by the National Natural Science Foundation of China (Grant No: 21808060), the Fundamental Research Funds for the Central Universities (222201814009) and the Undergraduate Training Program for Innovation and Entrepreneurship of East China University of Science and Technology (X19029).

语种：英文

外文关键词：Polyamide; Interfacial polymerization; Heat-treatment; Post treatment; Thin-film composite membrane

摘要：In this study, we utilized the NaOH solution as a heat-treating medium to replace the conventional oven-heating process after interfacial polymerization for the RO membrane fabrication. XPS result confirmed that the nascent RO membrane possessed a gradient cross-linking density along the polyamide layer depth, which is relatively loose on top and dense facing the substrate. The top loose polyamide could be exfoliated under NaOH treatment. The TFC membrane treated in a 1.5 mol L-1 NaOH solution exhibited a pure water flux nearly 3 times higher than that heat-treated in a water bath and also maintained a high NaCl rejection. In consideration of the practical operation process, membrane stability was evaluated, and the results showed that the membrane heat-treated by 1.5 mol L-1 NaOH solution possessed good long-term and pH stability. Thus, the facile heat-treating strategy provides a new path for fabricating high flux TFC-RO membranes.