膜
灵活性(工程)
材料科学
化学工程
财产(哲学)
锂(药物)
离子
分离(统计)
纳米技术
化学
计算机科学
有机化学
心理学
数学
生物化学
工程类
哲学
统计
认识论
机器学习
精神科
作者
Jun Zhao,Ruiqing Fan,Shengchang Xiang,Jiapeng Hu,Xin‐Qiang Zheng
出处
期刊:Membranes
[MDPI AG]
日期:2023-05-09
卷期号:13 (5): 500-500
被引量:5
标识
DOI:10.3390/membranes13050500
摘要
Metal-organic framework (MOF) membranes exhibit immense potential for separation applications due to their regular pore channels and scalable pore sizes. However, structuring a flexible and high-quality MOF membrane remains a challenge due to its brittleness, which severely restricts its practical application. This paper presents a simple and effective method in which continuous, uniform, defect-free ZIF-8 film layers of tunable thickness are constructed on the surface of inert microporous polypropylene membranes (MPPM). To provide heterogeneous nucleation sites for ZIF-8 growth, an extensive amount of hydroxyl and amine groups were introduced on the MPPM surface using the dopamine-assisted co-deposition technique. Subsequently, ZIF-8 crystals were grown in-situ on the MPPM surface using the solvothermal method. The resultant ZIF-8/MPPM exhibited a lithium-ion permeation flux of 0.151 mol m-2 h-1 and a high selectivity of Li+/Na+ = 1.93, Li+/Mg2+ = 11.50. Notably, ZIF-8/MPPM has good flexibility, and the lithium-ion permeation flux and selectivity remain unchanged at a bending curvature of 348 m-1. These excellent mechanical characteristics are crucial for the practical applications of MOF membranes.
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