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Covalent organic frameworks for membrane separation
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2019-04-26 00:00:00 , DOI: 10.1039/c8cs00919h Shushan Yuan 1, 2, 3, 4, 5 , Xin Li 6, 7, 8, 9 , Junyong Zhu 6, 7, 8, 9 , Gang Zhang 1, 2, 3, 4, 5 , Peter Van Puyvelde 6, 7, 8, 9 , Bart Van der Bruggen 6, 7, 8, 9
Chemical Society Reviews ( IF 40.4 ) Pub Date : 2019-04-26 00:00:00 , DOI: 10.1039/c8cs00919h Shushan Yuan 1, 2, 3, 4, 5 , Xin Li 6, 7, 8, 9 , Junyong Zhu 6, 7, 8, 9 , Gang Zhang 1, 2, 3, 4, 5 , Peter Van Puyvelde 6, 7, 8, 9 , Bart Van der Bruggen 6, 7, 8, 9
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Covalent organic frameworks (COFs), which are constructed from organic linkers, are a new class of crystalline porous materials comprising periodically extended and covalently bound network structures. The intrinsic structures and the tailorable organic linkers endow COFs with a low density, large surface area, tunable pore size and structure, and facilely-tailored functionality, attracting increasing interests in different fields including membrane separations. Exciting research activities ranging from fabrication strategies to separation applications of COF-based membranes have appeared. This review analyzes the synthesis and applications of diverse continuous/discontinuous COF membranes, such as COF-based mixed matrix membranes (MMMs), COF-based thin film nanocomposite (TFN) membranes, and free-standing COF films. Special attention was given to pore size, stability, hydrophilicity/hydrophobicity and surface charge of COFs in view of determining proper COFs for membrane fabrication, along with the approaches to fabricate COF-based membranes, such as blending, in situ growth, layer-by-layer stacking and interfacial polymerization (IP). Moreover, applications of COF-based membranes in gas separation, water treatment (deaslination and dye removal), organic solvent nanofiltration (OSN), pervaporation and fuel cell are disscussed. Finally, we illustrate the advantages and disadvantages of COF-based membranes through a comparison with MOF-based membranes, and the remaining challenges and future opportunities in this field.
中文翻译：
用于膜分离的共价有机骨架
由有机连接基构建的共价有机骨架（COF）是一类新型的晶体多孔材料，包含周期性扩展和共价键合的网络结构。固有的结构和可定制的有机连接基赋予了COF低密度，大表面积，可调节的孔径和结构以及易于定制的功能性，在包括膜分离在内的不同领域引起了越来越多的关注。从制造策略到基于COF的膜分离应用的激动人心的研究活动已经出现。这篇综述分析了各种连续/不连续COF膜的合成和应用，例如基于COF的混合基质膜（MMM），基于COF的薄膜纳米复合材料（TFN）膜和独立式COF膜。原位生长，逐层堆叠和界面聚合（IP）。此外，讨论了基于COF的膜在气体分离，水处理（脱胶和去除染料），有机溶剂纳滤（OSN），全蒸发和燃料电池中的应用。最后，我们通过与基于MOF的膜进行比较来说明基于COF的膜的优缺点，以及该领域中尚存的挑战和未来的机会。
更新日期：2019-04-26
中文翻译：
用于膜分离的共价有机骨架
由有机连接基构建的共价有机骨架（COF）是一类新型的晶体多孔材料，包含周期性扩展和共价键合的网络结构。固有的结构和可定制的有机连接基赋予了COF低密度，大表面积，可调节的孔径和结构以及易于定制的功能性，在包括膜分离在内的不同领域引起了越来越多的关注。从制造策略到基于COF的膜分离应用的激动人心的研究活动已经出现。这篇综述分析了各种连续/不连续COF膜的合成和应用，例如基于COF的混合基质膜（MMM），基于COF的薄膜纳米复合材料（TFN）膜和独立式COF膜。原位生长，逐层堆叠和界面聚合（IP）。此外，讨论了基于COF的膜在气体分离，水处理（脱胶和去除染料），有机溶剂纳滤（OSN），全蒸发和燃料电池中的应用。最后，我们通过与基于MOF的膜进行比较来说明基于COF的膜的优缺点，以及该领域中尚存的挑战和未来的机会。
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