Membranes of Polymer of Intrinsic Microporosity PIM-1 for Gas Separation: Modification Strategies and Meta-Analysis

• Critical review of PIM-1-based membranes for selective CO2 separation, highlighting their high permeability but challenges in selectivity, physical aging, and plasticisation. • Comprehensive meta-analysis comparing state-of-the-art modification strategies, including chain modification, post-modification, blending, and filler addition. • Discussion of PIM-1 thin film composite membranes and their potential for industrial gas separation, emphasizing the need for higher technology readiness. • Guidance for future design and optimisation of PIM-based membranes to overcome current limitations and enhance practical applicability.