Double charge flips of polyamide membrane by ionic liquid-decoupled bulk and interfacial diffusion for on-demand nanofiltration

被引：0

作者：

Guo, Bian-Bian ^{[1
]}

Liu, Chang ^{[1
,2
]}

Zhu, Cheng-Ye ^{[1
,2
]}

Xin, Jia-Hui ^{[1
]}

Zhang, Chao ^{[1
,2
]}

Yang, Hao-Cheng ^{[1
,2
]}

Xu, Zhi-Kang ^{[1
,2
]}

机构：

[1] Zhejiang Univ, MOE Engn Res Ctr Membrane & Water Treatment, Dept Polymer Sci & Engn, Key Lab Adsorpt & Separat Mat & Technol Zhejiang P, Hangzhou 310058, Peoples R China

[2] Zhejiang Univ, Int Res Ctr forPolymers 10, Belt & Rd Sino Portugal Joint Lab Adv Mat, Hangzhou 310058, Peoples R China

来源：

NATURE COMMUNICATIONS | 2024年 / 15卷 / 01期

基金：

中国国家自然科学基金; 中央高校基本科研业务费专项资金资助;

关键词：

SI ANODES; LITHIUM; ELECTROLYTE; STABILITY; ARTIFACTS; STRATEGY;

D O I：

暂无

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Fine design of surface charge properties of polyamide membranes is crucial for selective ionic and molecular sieving. Traditional membranes face limitations due to their inherent negative charge and limited charge modification range. Herein, we report a facile ionic liquid-decoupled bulk/interfacial diffusion strategy to elaborate the double charge flips of polyamide membranes, enabling on-demand transformation from inherently negative to highly positive and near-neutral charges. The key to these flips lies in the meticulous utilization of ionic liquid that decouples intertwined bulk/interfacial diffusion, enhancing interfacial while inhibiting bulk diffusion. These charge-tunable polyamide membranes can be customized for impressive separation performance, for example, profound Cl-/SO42- selectivity above 470 in sulfate recovery, ultrahigh Li+/Mg2+ selectivity up to 68 in lithium extraction, and effective divalent ion removal in pharmaceutical purification, surpassing many reported polyamide nanofiltration membranes. This advancement adds a new dimension to in the design of advanced polymer membranes via interfacial polymerization. Currently polyamide membranes fabricated by interfacial polymerization are limited by inherently negative charge as well as narrow charge tailoring window restricting the application of these membranes. Here, the authors report a facile ionic liquid-decoupled bulk/interfacial diffusion strategy to fabricate polyamide membranes which can transform on-demand from inherently negative to highly positive and near-neutral charge.

引用

页数：11