Separation performance of asymmetric membranes based on PEGDa/PEI semi-interpenetrating polymer network in pure and binary gas mixtures of CO2, N2 and CH4

▶ Semi-interpenetrating network asymmetric membranes of polyetherimide and cross linked polyethylene glycol. ▶ CO2/N2 selectivity of 50 matching PEGDa and CO2/CH4 selectivity of 40 matching PEI. ▶ Selectivity defaults to higher value of the two individual components. ▶ No plasticization observed.