文献类型：期刊文献

英文题名：Ultrathin surface-amination-modified membrane with ion-charge shielding effect for ultraselective nanofiltration

作者：Song, Qiangqiang[1];Lin, Yuqing[2];Gan, Ning[2];Sadam, Hussain[1];An, Yaguang[1];Wang, Zheng[3];Guan, Kecheng[3];Zhu, Junyong[1];Wang, Jing[1];Zhang, Yatao[1];Matsuyama, Hideto[3]

机构：[1]Zhengzhou Univ, Sch Chem Engn, Zhengzhou 450001, Peoples R China;[2]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[3]Kobe Univ, Res Ctr Membrane & Film Technol, Kobe 6578501, Japan

年份：2025

卷号：597

外文期刊名：DESALINATION

收录：;EI(收录号：20244817441205);WOS:【SCI-EXPANDED(收录号:WOS:001369287000001)】；

基金：This study was partially supported by a Kobe University Strategic International Collaborative Research Grant (Type B: Fostering Joint Research) . This work was supported by National Postdoctoral Researcher Program, grant No. GZC20241542. The characterizations and simulations were measured in the National Supercomputing Center in Zhengzhou Centre of Advanced Analysis & Gene Sequencing of Zhengzhou University, respectively.

语种：英文

外文关键词：Nanofiltration; Surface amination; Ion-charge shielding effect; Mixed-charged multivalent ions removal; Emerging contaminants removal; Boron removal

摘要：While membrane-based separation represents the preeminent technology for addressing the global challenge of water scarcity through desalination and potable wastewater reuse, existing nanofiltration membranes with monocharged surface properties remain deficient at achieving high-precision selectivity for harmful constituents with varying chargeability. In response to these issues, a membrane fabrication strategy was devised in this study to achieve ultraselective separation; essentially, a neutral-charged polyamide-based membrane was prepared by grafting of polyallylamine (PAA) onto the terminus of carboxylic nanochannels. The PAA monomers, which had controllable amine sites, were aligned at the membrane interface to neutralize the surface charge and minimize the pore size. The newly developed ultrathin (similar to 23-nm thickness) surface-aminated membrane, with intensified ion-charge shielding and promoted size-exclusion effects, achieved remarkably precise separation property for a wide range of solutes, including near-perfect rejection of mixed-charge multivalent ions, near-complete removal of various trace emerging contaminants (ECs), and high boron retention (>74.7 %). The PAA-modified membrane demonstrated an exceptionally comprehensive desalination performance that exceeded the existing upper bound of ion permselectivity versus water permeability (14.2 L.m(-2).h(-1).bar(-1)), thereby surpassing state-of-the-art nanofiltration membranes.