Properties of hybrid materials based on perfluorinated sulfo-cation exchange MF-4SC membranes (Russian analog of Nafion) and nanoparticles with different chemical nature were studied. Influence of dopant nature (hydrophilicity, proton acceptor ability) on the ion conductivity and selectivity of transport processes is described. Obtained data are explained on the basis of the model of the semielasticity of membranes pores and channels. (C) 2013 Elsevier B.V. All rights reserved.