Cross-Linked Polymer Membranes for Energy-Efficient Gas Separation: Innovations and Perspectives

Abstract

Polymeric membranes for gas separations have experienced rapid growth over the past few decades, and extensive research has been performed to develop high-performance polymer membrane materials with outstanding stability and durability. Cross-linking of polymers has been demonstrated as an effective approach to improve the resistance to physical aging as well as plasticization induced by condensable gases like CO 2 . In this Perspective, we examine recently reported, innovative strategies that have produced cross-linked polymeric membranes with attractive separation performance as well as resistance to plasticization and physical aging. The discussion will cover the state-of-the-art design strategies that are focused on cross-linking chemistry and innovative cross-linked network structures, with an emphasis on the effect of cross-linking on membrane properties. New research directions are proposed for advancing the development of cross-linked polymer membrane materials to realize the full potential of this class of membrane materials for gas separation applications and beyond.