Current–Voltage Curves for a Cation-Exchange Membrane in Methanol–Water Electrolyte Solutions

Swelling and electro-osmotic properties of cation-exchange membranes with different structures in methanol–water media

“…At higher percentages of methanol the slope decreases. This behavior may be due to the dependence of the conductivity of the solution on the methanol percentage, where is observed that a minimum is presented at percentages around 50% [15], and it is in agreement with previous results [8,16]. This observed decrease in specific conductivity is due to the decrease in the dielectric constant of the solvent with increasing methanol content and, so, to the decrease in the ability of the solvent to dissolve the electrolyte [17].…”

Simultaneous electroosmotic and permeation flows through a Nafion membrane

“…In relation to L 12 and L 22 coefficients, lower values are obtained than in the case of aqueous solutions, with a decreasing tendency with increasing methanol content of the solution. The decrease of L 22 with increasing proportion of methanol is due to the decrease in the ability of the solvent to dissolve the electrolyte [15], and is in agreement with other previous results [14,16].…”

Streaming potential across cation-exchange membranes in methanol–water electrolyte solutions

“…This fact is in agreement with the results obtained by Chou and Tanioka [16], who found that the effective membrane charge density and cation-toanion mobility ratio in a membrane depend on the fraction of methanol for aqueous-methanol LiCl solutions. A similar dependence as the found for the pressure coefficient was also observed in the study of the limiting current in methanolwater mixtures for both membranes [17,18]. This behavior was based on the diminution in the specific conductivity, due to the decrease in the dielectric constant of the solvent with increasing proportion of methanol, and, so, to the decrease in the ability of the solvent to dissolve the electrolyte [19].…”