文献类型：期刊文献

英文题名：Two-dimensional confined channels with high-density hydrophilic microregions for enhanced selective water transport

作者：Dai, Liheng[1];Xiong, Zhaodi[1];Xu, Weiyi[1];Qu, Kai[1];Wang, Yixing[1];Gu, Shuyun[1];Cao, Hongyan[2];Yu, Ying[2];Lei, Linfeng[1];Li, Siyao[1];Huang, Kang[2];Guo, Xuhong[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, 30 Puzhu South Rd, Nanjing 211816, Peoples R China

年份：2023

卷号：671

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20230413417305);WOS:【SCI-EXPANDED(收录号:WOS:000922467500001)】；

基金：Acknowledgements The authors gratefully acknowledge the research funding provided by National Key R & D Program of China (Grant Nos. 2021YFB3801301) and National Natural Science Foundation of China (Grant Nos. 22075076,21908054) ..

语种：英文

外文关键词：Two-dimensional membrane; Graphene oxide; Water-selective transport; Confined mass transfer; Hydrophilic microregion

摘要：Two-dimensional (2D) membranes represented by graphene oxide (GO) exhibit great potential in developing high-performance separation membranes. However, insufficient interlayer chemical microenvironment and unstable laminar structure are still huge challenge to achieve high-efficiency water-selective transport. Herein, we construct high-density hydrophilic microregions in GO membrane through introducing sodium polystyrene sulfonate (PSSNa) with abundant ionized sulfonate groups to provide good hydrophilic chemical microenvi-ronment, further facilitating fast water-selective permeation. Meanwhile, the obtained well-stacked lamina structure driven by self-assembly between PSSNa and GO nanosheets conduce to achieve superior separation of water-butanol mixture through strict size sieving effect. Consequently, the as-prepared PSSNa/GO membrane on polyethersulfone (PES) substrate exhibit excellent separation performance with flux of 5.28 kg m-2 h-1 and excellent separation factor of 3487 for water/butanol at 343 K, representing the state-of-the-art selective sepa-ration membranes. This strategy provides new insight to finely construct better chemical microenvironment in 2D confined channels for precise and high-efficiency aqueous molecular separation process.