膜
纳滤
材料科学
化学工程
涂层
低聚物
共价有机骨架
共价键
高分子化学
有机化学
纳米技术
化学
生物化学
工程类
作者
Huiting Yu,Jiayu Guan,Yaohan Chen,Yuxuan Sun,Shengyang Zhou,Jifu Zheng,Qifeng Zhang,Shenghai Li,Suobo Zhang
出处
期刊:Small
[Wiley]
日期:2023-09-15
卷期号:20 (4)
被引量:3
标识
DOI:10.1002/smll.202305613
摘要
Covalent organic frameworks (COFs) are a family of engaging membrane materials for molecular separation, which remain challenging to fabricate in the form of thin-film composite membranes due to slow crystal growth and insoluble powder. Here, an additive approach is presented to construct COF-based thin-film composite membranes in 10 min via COF oligomer coating onto poly(ether ether ketone) (PEEK)ultrafiltration membranes. By the virtue of ultra-thin liquid phase and liquid-solid interface-confined assembly, the COF oligomers are fast stacked up and grow along the interface with the solvent evaporation. Benefiting from the low out-plane resistance of COFs, COF@PEEK composite membranes exhibit high solvent permeances in a negative correlation with solvent viscosity. The well-defined pore structures enable high molecular sieving ability (Mw = 300 g mol-1 ). Besides, the COF@PEEK composite membranes possess excellent mechanical integrities and steadily operate for over 150 h in the condition of high-pressure cross flow. This work not only exemplifies the high-efficiency and scale-up preparation of COF-based thin-film composite membranes but also provides a new strategy for COF membrane processing.
科研通智能强力驱动
Strongly Powered by AbleSci AI