文献类型：期刊文献

英文题名：Bioinspired membrane with Angstrom-scale channels: A versatile nanofluidic platform for efficient single-ion sieving

作者：Wu, Baolong[1];Lin, Yuqing[1,2];Gan, Ning[1,2];Qiu, Yulong[1];Sun, Haopan[1];Su, Jingwen[1];Huang, Penglu[1];Lin, Xiaoyan[1];Yu, Jianguo[1];Yoshioka, Tomohisa[2];Matsuyama, Hideto[2]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe, Japan

年份：2026

卷号：72

期号：1

外文期刊名：AICHE JOURNAL

收录：;EI(收录号：20254219343612);WOS:【SCI-EXPANDED(收录号:WOS:001592563600001)】；

基金：National Natural Science Foundation of China, Grant/Award Number: 92475207; Intergovernmental Cooperation of Science and Technology Program of Shanghai, Grant/Award Number: 22520710800; Kobe University Strategic International Collaborative Research; Type B Fostering Joint Research; Grant-in-Aid for Research Activity Start-up, Grant/Award Number: 25K23530

语种：英文

外文关键词：ammonium-functionalized crown ethers; biomimetic channels; electrodialysis; ion-conductive membranes; single-ion separation

摘要：Bioinspired ion-selective transport with high precision has long been a key pursuit in artificial membrane engineering and process industries. However, developing angstrom-scale ion channels remains a significant challenge due to the difficulty of precisely controlling the internal structure and chemical microenvironment of pore channels. Herein, we present a biomimetic membrane fabricated by sub-nanoconfining fully crosslinked ammonium-functionalized crown ethers (diaminobenzo-15-crown-5-ether, DAB15C5) within the pore channels of a polyamide (PA) nanofilm via surface polymerization for electromembrane desalination. The resulting DAB15C5@PA membrane exhibits a high K+ permeation rate of 1.83 molm-2h-1 under multi-component conditions, along with excellent single-ion selectivity, achieving mono/monovalent (K+/Li+) and mono/divalent (K+/Mg2+) ratios of 5.2 and 33.5, respectively. Theoretical operando analysis suggests that the preferential single-ion K+ extraction/separation mechanism stems from the significant disparities in transport energy barriers among ions, synergistically governed by different extents in local dehydration, enhanced size-exclusion effects, and preferential interaction screening.