Polarization and structural characteristics of nanocomposites based on the perfluorinated sulphocationic membranes and polyaniline

For the first time the effect of essential shift of the overlimiting state potentials on the current Á voltage curves for the composite membranes PANI/MF-4SC has been observed. This effect is explained by morphology changes of initial membrane due to formation of interpolymeric complexes of electron-conducting polyaniline with polymer segments of perfluorinated matrix. The obtained results indicate the dominating role of water in the polarization phenomena.

The CVC of perfluorinated MF-4SC membrane/PANI composites obtained under different conditions of synthesis were investigated. In CVC with MF-4SC/PANI composites, the potential transition into the overlimiting state increases more than 2 V in comparison with initial membrane. It was shown that a possible reason of the observed phenomenon is the change of water energetic state with the formation of an interpolymeric aqua complex in the spaces between the nitrogen-containing PANI components and the side chains of the template matrix. The water immobilization in the (a) ΔE, V pH 1.6 0.8 0.4 (b) i, A/m2 ΔE, V 6.0 pH 5.0 4.0 3.0 2.0 1.0 0.0 materials both in the fuel cell systems and separation processes.