Investigation of gas separation on polyaniline laminar composite membranes

Membranes prepared of pure PANI reportedly showed satisfactory selectivity and low permeability. Some data, scarce as yet, indicate that there exists a possibility of changing the selectivity coefficient by doping the conduct ive polymer. We report the results of a study on the possibilities of using composite membranes, with PANI as an active, gas-mixture-separation consti tuent and with polystyrene as a carrier substrate. Permeability coefficient s were used to obtain the ideal gas-transport selectivity coefficient for H Z, Nz and Oz. The results of the measurements are presented as a dependence of pameability and selectivity coefficients on PANI layer thickness in com posite membrane, protonation degree and the size of the doping anion.