阻塞(统计)
离子交换
化学
离子
膜
色谱法
计算机科学
有机化学
生物化学
计算机网络
作者
Xueting Zhao,Jinshan Sun,Lei Zhao,Jiajing Dong,Chi Zhang,Xu Zhang,Jing Pan
出处
期刊:ACS ES&T water
[American Chemical Society]
日期:2024-04-10
标识
DOI:10.1021/acsestwater.4c00077
摘要
In this work, monovalent cation perm-selective membranes (MCPMs) with multiple internal-blocking sites were designed to enhance the Donnan effect and size-based exclusion effect. Polypyrrole (PPy), as the internal-blocking sites for ion transport, was introduced within the membrane matrix by in situ polymerization, which was prominent to mono- and multivalent ion separation in electrodialysis (ED). The precise growth of the internal-blocking sites was manipulated via optimization of the polymerization time and polymerization steps. The optimized SPPSU@3PPy membrane exhibits excellent separation performance: the SPPSU@3PPy membrane demonstrates perm-selectivity for Na+/Mg2+ (PNa Mg = 2.08) and a higher Na+ flux (JNa+ = 3.29 × 10–8 mol cm–2 s–1). This in situ polymerization method to fabricate internal-blocking sites in a cation exchange membrane is a potential pathway to construct MCPMs.
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