Gas permeation experiments of CO2 and N2 were performed with PEG diacrylate/chitosan semi-interpenetrating membranes. The semi-IPN membranes were prepared using porous polyethersulfone membrane as a support membrane and UV irradiated crosslinking meth...
Gas permeation experiments of CO2 and N2 were performed with PEG diacrylate/chitosan semi-interpenetrating membranes. The semi-IPN membranes were prepared using porous polyethersulfone membrane as a support membrane and UV irradiated crosslinking method. The CO2 gas permeation occurred through the free volume of semi-IPN and was enhanced by selective sorption of CO2 gas in polyether (PEO), while the chitosan contributed to mechanical properties and film-forming ability. The poly(ethylene oxide) (PEO) crosslinked IPN showed very high CO2/N2 separation, for example permeability coefficient of CO2, PCO2 = 21.1 Barrer(10-10 cm3(STP)cm/cm2·s·cmHg) and permeability ratio of CO2 over N2, PCO2/PN2=11.7 at 50℃. This permselectivity is attributed to high solubility selectivity due to the affinity of CO2 to PEO. Lowering the temperature, PCO2 decreases but PCO2/PN2 does not change significantly. The effect of PEO content, PEO length and temperature on PCO2 and PCO2/PN2 are investigated.