MOFs在乳液中的可控生长

Controlled Growth of MOFs in Emulsion

金属有机框架(Metal organic frameworks,MOFs)材料是金属离子与有机配体自组装形成的形貌可控的多孔晶体材料。表面活性剂的乳化作用是形成乳液的关键,其自组装形成不同形貌的胶束控制最终产物的形貌。因此,在MOFs的制备中,不同乳液体系中的胶束亦可以作为反应模板,从而调控MOFs的形貌。本文简要介绍了传统乳液、反相微乳液、无皂乳液和Pickering乳液的形成机理和特点。重点综述了近年来MOFs在不同乳液体系中可控生长研究。其中,利用无皂乳液法和Pickering乳液法是构建MOFs复合材料的理想思路。

Metal organic frameworks(MOFs),which are formed by self⁃assembly of metal ions and organic ligands,are porous crystal materials with controllable morphology.Meanwhile,the emulsification of surfactants plays a key role in the formation of emulsion.The morphologies of micelles by self⁃assembly of surfactant controls the final morphology of the target materials.Therefore,micelles in emulsion are employed as reaction templates to modulate the morphology of MOFs.In the current review,the formation mechanism and characteristics of traditional emulsion,inverse microemulsion,surfactant⁃free emulsion and Pickering emulsion are briefly introduced.The progress in controllable growth of MOFs in emulsions is reviewed in detail.In particular,it is an ideal strategy for constructing MOFs composites by using surfactant⁃free emulsion method and Pickering emulsion method.