基于气体分离混合基质膜的界面调控

Interface control based on gas separation mixed matrix membrane

混合基质膜(MMMs)结合了传统有机膜材料和无机纳米材料的优势,突破了传统聚合物膜材料的渗透性与选择性之间的权衡限制,即“trade-off”效应,为高效的分离膜材料研究提供了新途径.但由于聚合物基体与纳米填料之间的相容性问题,往往在有机无机相界面中形成空穴、僵化等非选择性缺陷.本文综述了MMMs常用的克服界面缺陷的调控技术,主要有聚合物基体的物化调控、纳米填料的物化调控、添加界面黏合剂以及后处理,并针对目前的调控方法提出存在的问题和展望,为高性能膜分离材料的制备方法提供新思路.

Mixed matrix membranes(MMMs)combine the advantages of traditional organic membranes and inorganic nanomaterials,and break the permeability-selectivity trade-off of traditional polymeric membranes,which providing a new way for efficient separation membrane materials.However,due to the compatibility between the polymer matrix and nano-fillers,non-selective defects as voids and rigidified polymer are often formed in the organic-inorganic interface.This paper reviews the commonly used approaches to MMM materials design to overcome the interfacial drawbacks,i.e.,physical and chemical regulation of polymer matrix,physical and chemical modification of nano-filler,introduction of interfacial adhesive and post-treatment.The problems and prospects for the current regulating methods are presented providing some new ideas for the preparation of high-performance separation membrane materials.