The Effect of Hydroxy Groups from the Hydrolysis of PVAc and β-Cyclodextrine on Permeability and Selectivity of Polyurethane/Polyvinyl Acetate Membranes

One of the most interesting applications of the polymer membranes is the separation of CO2 gas from N2 gas which is important in natural gas sweetening and industrial waste gasstreams in view of global warming. The focus on Polyurethane/Polyvinyl acetate blend membrane is increasingbecause of their morphology [1,2]. Also by hydrolysis of polyvinyl acetate the number OH groups in membrane increases. The doughnut shape of β-Cyclodextrine that havehydrophobic cavity with appropriate dimensions that can form inclusion complexes leads to separation of polar gases likeCO2 from non polar gases like N2 [3].