文献类型：期刊文献

英文题名：Heterostructured polyamide membrane with dual-charge effects for ultra-selective nanofiltration

作者：Qiu, Yulong[1];Gan, Ning[1];Lin, Yuqing[1];Wu, Baolong[1];Yu, Jianguo[1];Matsuyama, Hideto[2]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake Re, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Kobe Univ, Res Ctr Membrane & Film Technol, Dept Chem Sci & Engn, Kobe 6500034, Japan

年份：2025

卷号：720

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20250517786004);WOS:【SCI-EXPANDED(收录号:WOS:001417524600001)】；

基金：This research was supported by the National Natural Science Foundation of China (22208095) and Intergovernmental Cooperation of Science and Technology Program of Shanghai (22520710800). This work was also supported by Kobe University Strategic International Collaborative Research Grant (Type B Fostering Joint Research).

语种：英文

外文关键词：Heterostructured nanodomains; Dual-charge effect; Tunable surface charge; Interfacial polymerization; Nanofiltration

摘要：The fine-tuning of surface charges in polyamide membranes presents a challenge for ultra-selective ionic and molecular sieving. Conventional membranes confront limitations due to their inherently single charge and a restricted range of charge modification. Herein, a novel heterostructured membrane featuring oppositely charged surfaces was developed by regulating the interfacial polymerization (IP) of N-aminoethyl piperazine (AEP)/polyethyleneimine (PEI) to overcome these existing issues. The experimental results and molecular dynamics simulations revealed a significant disparity in the diffusion rates of copolymerized amine monomers, resulting in the formation of heterostructured nanodomains. One side of the membrane was enriched with negatively-charge carboxyl groups, whereas the other side was enriched with positively-charge ammonium groups. The heterostructured membrane exhibited excellent separation selectivity for multivalent anions and cations (>97.0 %) and achieved near-complete removal of various trace emerging contaminants (ECs) and small organics. Additionally, it exhibited high water permeance (14.7 L m(-2) h(-1) bar(-1)), surpassing the separation performance of many state-of-the-art nanofiltration membranes. Our study provides new insights into how controllable monomer transfer can influence the IP reaction, and provide heterostructured nanofilms for comprehensive and efficient separations for wastewater treatment, resource recovery, and beyond.