Gas separation properties of poly(ethylene glycol)/poly(tetramethylene glycol) based polyurethane membranes

▸ The effect of soft segment on gas separation properties of PU membrane investigated. ▸ By increasing the amount of PEG in PU, the phase separation decreases. ▸ The solubility domination of gas transport in studied PU membranes investigated. ▸ Low permeability of CO2, but high selectivity of CO2/N2, observed for PEG based PU. ▸ The studied PU membranes show high performance in CO2/N2 gas separation.