文献类型：期刊文献

英文题名：Tannic Acid/Fe3+ Nanoscaffold for Interfacial Polymerization: Toward Enhanced Nanofiltration Performance

作者：Yang, Zhe[1];Zhou, Zhi-wen[2];Guo, Hao[1];Yao, Zhikan[1];Ma, Xiao-hua[1,3];Song, Xiaoxiao[4];Feng, Shien-Ping[2];Tang, Chuyang Y.[1]

机构：[1]Univ Hong Kong, Dept Civil Engn, Pokfulam, Hong Kong, Peoples R China;[2]Univ Hong Kong, Dept Mech Engn, Pokfulam, Hong Kong, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem Engn, Mei Long Rd 130, Shanghai 200237, Peoples R China;[4]Zhejiang Univ Technol, Ocean Coll, Ctr Membrane & Water Sci & Technol, Hangzhou 310014, Zhejiang, Peoples R China

年份：2018

卷号：52

期号：16

起止页码：9341

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20183105641083);WOS:【SCI-EXPANDED(收录号:WOS:000442706700037)】；

基金：The study received financial support from the General Research Fund of the Research Grants Council (Project # 17207514). The partial funding support from Seed Funding for Strategic Interdisciplinary Research Scheme at the University of Hong Kong was also appreciated.

语种：英文

外文关键词：Flavonoids - Sodium chloride - Iron compounds - Polymerization - Pore size - Thin films - Composite membranes - Sodium sulfate - Nanofiltration membranes - Nanofiltration - Tannins

摘要：Conventional thin-film composite (TFC) membranes suffer from the trade-off relationship between permeability and selectivity, known as the "upper bound". In this work, we report a high performance thin-film composite membrane prepared on a tannic acid (TA)-Fe nanoscaffold (TFCn) to overcome such upper bound. Specifically, a TA-Fe nanoscaffold was first coated onto a polysulfone substrate, followed by performing an interfacial polymerization reaction between trimesoyl chloride (TMC) and piperazine (PIP). The TA-Fe nanoscaffold enhanced the uptake of amine monomers and provided a platform for their controlled release. The smaller surface pore size of the TA-Fe coated substrate further eliminated the intrusion of polyamide into the substrate pores. The resulting membrane TFCn showed a water permeability of 19.6 +/- 0.5 L m(2-) h(-1) bar(-1), which was an order of magnitude higher than that of control TFC membrane (2.2 +/- 0.3 L m(-2) h(-1) bar(-1)). The formation of a more order polyamide rejection layer also significantly enhanced salt rejection (e.g., NaCl, MgCl2, Na2SO4, and MgSO4) and divalent to monovalent ion selectivity (e.g., NaCl/MgSO4). Compared to conventional TFC nanofiltration membranes, the novel TFCn membrane successfully overcame the longstanding permeability and selectivity trade-off. The current work paves a new avenue for fabricating high performance TFC membranes.