Surface modifications for preparation of MOF thin films

doi:10.16085/j.issn.1000-6613.2017.04.021

Abstract

Abstract: This review summarizes the recent research progress of surface modification methods for the preparation of metal-organic framework(MOF) thin films. MOF,featured by designable structures,tunable pore sizes and functions and so on,is considered as attractive membrane material for gas separation. Forming interfacial interaction between the MOF crystals and substrates is the key to fabricate a continuous and compact MOF film. Surface modifications can improve the physical/chemical properties of the substrates and enhance the interaction force between MOF crystals and substrates. In this review,three main surface modification methods for the preparation of MOF thin films are highlighted,including organic molecular modification,inorganic compound modification,and MOF seed modification. Particularly,the modification mechanisms of different modification methods are emphasized,and the influences of the modification methods on the preparation and gas separation performance of MOF thin films are analyzed. Due to the diversity of MOF and complexity of the film formation,single modification can't always produce dense and uniform MOF membrane. Therefore,we propose that it will be an important development direction for the preparation of MOF films to combine different modification methods according to the properties of the MOF and the substrate.

Key words: metal-organic framework, film, preparation, surface modification, gas separation

摘要： 综述了近几年表面修饰手段在金属-有机骨架（MOF）薄膜制备中的应用研究进展。MOF材料由于具有结构可设计、孔道尺寸可调且可功能化等特点，在气体分离膜领域具有极大的应用价值。制备连续致密MOF膜的关键是解决MOF与基底之间的界面结合问题。表面修饰可改善基底表面的物理化学性质，增强MOF与基底之间的相互作用力。本文从有机分子修饰、无机化合物修饰和MOF晶种修饰三方面入手，介绍修饰手段在MOF薄膜制备中的应用研究进展。其中，着重阐述了不同修饰手段的修饰机理，分析了修饰手段对MOF薄膜的制备及其气体分离性能的影响。研究表明，MOF的种类繁多且成膜过程复杂，有时单一的修饰手段无法制备高质量的MOF薄膜。因此，文中指出根据MOF和基底的性质，选择不同的修饰手段结合使用将是MOF薄膜制备的一个重要发展方向。

关键词: 金属-有机骨架, 膜, 制备, 表面修饰, 气体分离

CLC Number:

TQ016.1

QIN Xi, SUN Yuxiu, WANG Naixin, XIE Yabo, LI Jianrong. Surface modifications for preparation of MOF thin films[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1306-1315.

秦茜, 孙玉绣, 王乃鑫, 谢亚勃, 李建荣. 表面修饰在MOF薄膜制备中的应用[J]. 化工进展, 2017, 36(04): 1306-1315.

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