Recent Progress on Polymers of Intrinsic Microporosity and Thermally Modified Analogue Materials for Membrane‐Based Fluid Separations

Solution-processable amorphous glassy polymers of intrinsic microporosity (PIMs) are promising microporous organic materials for membrane-based gas and liquid separations due to their high surface area internal free volume, thermal chemical stability, excellent separation performance. This review provides an overview the most recent developments in design transport properties novel ladder PIM materials, polyimides (PIM–PIs), functionalized PIMs PIM–PIs, PIM-derived thermally rearranged (TR), carbon molecular sieve (CMS) membrane as well PIM-based thin film composite membranes a wide range energy-intensive separations. In less than two decades, have significantly lifted performance upper bounds H2/N2, H2/CH4, O2/N2, CO2/N2, CO2/CH4 However, still limited by insufficient gas-pair selectivity be considered challenging industrial such olefin/paraffin An optimum pore size distribution is required further improve given application. Specific attention potential use CMS CO2/CH4, N2/CH4, C2H4/C2H6, C3H6/C3H8 separations, containing motifs