Permeation of electrolyte water–methanol solutions through a Nafion membrane

Simultaneous electroosmotic and permeation flows through a Nafion membrane

“…Therefore, the behavior is similar than in the case of aqueous solutions with a positive deviation from linearity at higher pressure differences, which increases with the methanol content of the solutions. These results are in agreement with the results reported in a previous work [12] where the permeation flow of the Nafion 117 membrane was studied under different experimental conditions.…”

“…It is also observed higher flow values at higher methanol percentages, under the same experimental conditions. This behavior is in agreement with the results obtained in previous works [12]. As in the case of aqueous solutions, the permeation volume flow through the membrane was obtained from the slope of the linear part of the curve.…”

“…The coupling second order coefficient L 112 can be also estimated from Eq. (12). A summary of the results obtained for the phenomenological coefficients is given in Table 2 as a function of the methanol percentage.…”

Simultaneous electroosmotic and permeation flows through a Nafion membrane

“…The thickness, water content, and ion-exchange capacity provided by the manufacturer for this membrane are 1.83 × 10 −4 m, 35%, and 1.13 kmol/m 2 , respectively. This membrane, used previously in other related works [9][10][11], is a cation-exchange membrane that can be considered as a pure cation conductor, with a transport number of K + of about unity for low concentrations of KCl electrolyte.…”

Physicochemical and electrochemical characterization of battery separator prepared by radiation induced grafting of acrylic acid onto microporous polypropylene membranes

“…Radiation induced grafting offers some unique advantages over the conventional chemical grafting method since it results in uniform grafting and it is room a temperature process [4]. Radiation grafted co-polymers have been tried for a wide spectrum of applications like surface modification [5], separation purposes [6], biotechnology [7], electrochemical applications such as electro-dialysis [8], battery separator [9] and solid polymer electrolyte in fuel cells [10]. Ion exchange membranes have been investigated for their suitability as battery separator because of their durability, long life, high charge density and appreciable ion exchange capacity at optimum water content, which is the most desirable property of the separator membranes [11].…”