文献类型：期刊文献

英文题名：Fabrication of a novel and green thin-film composite membrane containing nanovoids for water purification

作者：Yang, Zhe[1];Huang, Xiaoyu[1];Ma, Xiao-hua[1,3];Zhou, Zhi-wen[2];Guo, Hao[1];Yao, Zhikan[1];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

年份：2019

卷号：570

起止页码：314

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20184406027140);WOS:【SCI-EXPANDED(收录号:WOS:000450325700034)】；

基金：This study receives financial support from the Seed Funding for Strategic Interdisciplinary Research Scheme, the University of Hong Kong.

语种：英文

外文关键词：Thin-film composite membrane; Polyamide rejection layer; Copper nanoparticles; Nanovoids; Water permeability

摘要：Thin film nanocomposite (TFN) membranes, which incorporate nanomaterials in a crosslinked polyamide matrix, often show enhanced separation properties thanks to the additional pores or channels offered by these materials. In this study, we deliberately created nanovoids in the dense polyamide rejection layer by acid-etching copper nanoparticles (CuNPs) contained in a TFN membrane. Systematic membrane characterization confirmed the complete removal of CuNPs using 1% HNO3, which formed nanovoids of approximately 10 nm in size. The water flux of the etched membrane TFC-Cu50X was nearly quadrupled compared to that of the CuNPs loaded membrane TFC-Cu50. This significantly improved water flux can be ascribed to the enhanced water transport through these nano-sized voids. The nanovoids-enhanced approach provides new possibilities for synthesizing high performance membranes.