García Villaluenga, Juan PedroSomovilla, PilarBarragán García, Vicenta MaríaIzquierdo Gil, María Amparo2023-06-182023-06-1820160376-738810.1016/j.memsci.2015.11.030https://hdl.handle.net/20.500.14352/24300© 2016 Journal of Membrane Science. The author would like to thank the anonymous reviewers for their valuable comments and suggestions to improve the quality of the paper. Financial support of this work by Banco de Santander and Universidad Complutense de Madrid within the framework of Project PR6/13-18853 is gratefully acknowledged.Liquid uptake and streaming potential have been determined in aqueous sodium chloride solutions for five different commercial sulfonated polymer cation-exchange membranes. The selected membranes have distinct morphologies and electrochemical properties. Differences in the liquid uptake properties of the membranes have been found, which have been analysed on the basis of the structure and the chemical properties of the membranes. In most of the membranes analyzed, the higher the liquid content of the membranes, the lower the effective concentration of fixed charges in the membranes. The streaming potential across the membranes increases linearly with the established pressure difference, and it is larger in heterogeneous membranes than in homogeneous ones. In general, the higher the membrane liquid content, the higher the streaming potential across the membranes.engAtribución-NoComercial-SinDerivadas 3.0 Españahttps://creativecommons.org/licenses/by-nc-nd/3.0/es/journal articlehttp://dx.doi.org/10.1016/j.memsci.2015.11.030http://www.sciencedirect.com/open access536Electro-kinetic phenomenaNon-equilibrium thermodynamicsCation-exchange membranesFísica (Física)Termodinámica22 Física2213 Termodinámica