Some aspects of polyaniline template synthesis within and on the surface of perfluorinated cation exchange membrane

Abstract

Detailed investigation has been made into the peculiarities of monomer sorption and desorption at different stages of aniline oxidative polymerization inside the perfluorinated membrane during preparation of composites with absorbance lower than 3 abs. units. The evaluation of the membrane saturation degree by monomer at every synthesis stage is performed, the mass fraction of the polyaniline in the composite membrane is estimated. The investigation into the kinetics of polyaniline synthesis with cationic and anionic oxidants in the membrane matrix has shown that the oxidant nature affects the polymerization rate and permitted to discover the limiting stage of the polymerization reaction. The limiting stage of polyaniline synthesis inside the membrane matrix is identified. The conditions to cease the polymerization reaction using oxidants of different nature are revealed. The opportunity to control the distribution of the modifier in the composite by choosing the appropriate oxidant is shown.