文献类型：期刊文献

英文题名：Ultrafast Water Transport in Two-Dimensional Channels Enabled by Spherical Polyelectrolyte Brushes with Controllable Flexibility

作者：Dai, Liheng[1];Xu, Fang[1];Huang, Kang[2];Xia, Yongsheng[2];Wang, Yixing[1];Qu, Kai[1];Xin, Li[2];Zhang, Dezhu[2];Xiong, Zhaodi[1];Wu, Yulin[1];Guo, Xuhong[1];Jin, Wanqin[2];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：2021

卷号：60

期号：36

起止页码：19933

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20213210731394);WOS:【SCI-EXPANDED(收录号:WOS:000680555500001)】；

基金：We are grateful for the financial support from the National Natural Science Foundation of China (Grant Nos. 21908054, 21908098 and 22075076), and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).

语种：英文

外文关键词：chain flexibility; graphene oxide; ordered polymer chains; two-dimensional confined spacing; water transport

摘要：Fast water transport channels are crucial for water-related membrane separation processes. However, overcoming the trade-off between flux and selectivity is still a major challenge. To address this, we constructed spherical polyelectrolyte brush (SPB) structures with a highly hydrophilic polyelectrolyte brush layer, and introduced them into GO laminates, which increased both the flux and the separation factor. At 70 degrees C, the flux reached 5.23 kg m(-2) h(-1), and the separation factor of butanol/water increased to approximate to 8000, which places it among the most selective separation membranes reported to date. Interestingly, further studies demonstrated that the enhancement of water transport was not only dependent on the hydrophilicity of the polyelectrolyte chains, but also influenced by their flexibility in the solvent. Quartz crystal microbalance with dissipation and molecular dynamics simulations revealed the structure-performance correlations between water molecule migration and the flexibility of the ordered polymer chains in the 2D confined space.