Influence of Chemical Modification on CO₂ Permeability of Polymers of Intrinsic Microporosity / Silica Nanoparticles Composite Membranes

Abstract

High gas permeable polymer membranes are required to achieve carbon dioxide capture and storage with high efficiency. In this study, novel mixed matrix membranes (MMMs) based on a chemically modified polymer of intrinsic microporosity and silica nanoparticles were fabricated, and their gas permeation properties were evaluated. The methyltetrazole-modified polymer of intrinsic microporosity (MTZ-PIM) showed higher CO₂/N₂ selectivity than the pristine PIM membrane, and their composite membrane with the surface-modified silica nanoparticles achieved improved CO₂ permeability and good selectivity.