Separation Membranes Based on Polymer Complexes

Due to the issue of global warming, research on gas separation membranes is of high interest around the world. Mixed matrix membranes (MMMs), which combine inorganic materials, such as metal complexes or metal–organic frameworks (MOFs), with gas separation polymers, have emerged as a research hotspot for gas separation membranes. Co-porphyrin as a carrier fixed in the polymer membrane indicated both significantly high oxygen permeability and (oxygen/nitrogen) selectivity because of high oxygen diffusion based on Langmuir adsorption between the Co-porphyrin and the oxygen. MOFs such as zeolite imidazolate are widely used to prepare MMMs owing to their easy functionalization or various pore channels. In this chapter, the gas separation performance of MMMs is described in detail.