摘要:
A method of preparing a relatively stable solution and/or dispersion of an ion-conducting polymeric material, for example one comprising phenyl moieties, carbonyl and/or sulphone moieties and ether and/or thioether moieties, comprises: (a) selecting a solvent mixture comprising water and a first organic solvent in which mixture said ion-conducting polymeric material can be dissolved and/or dispersed; (b) dissolving and/or dispersing said ion-conducting polymeric material in said solvent mixture; and (c) removing greater than 80% of the total amount of said first organic solvent in said solvent mixture, thereby to leave a formulation comprising said ion-conducting polymeric material dissolved and/or dispersed in a solvent formulation comprising a major amount of water.
摘要:
A method for continuously producing a polymer electrolyte membrane including: (i) a preparation step for preparing a polymer electrolyte solution by dissolving a polymer electrolyte containing an ion conductive polymer having an ion-exchange group in an organic solvent capable of dissolving the polymer electrolyte, (ii) a coating step for continuously obtaining a laminate film 1 wherein a supporting substrate and a layer containing an ion conductive polymer are laminated, by casting the polymer electrolyte solution obtained in the step (i) onto the continuously fed supporting substrate, and (iii) a drying step for continuously obtaining a laminate film 2 wherein the supporting substrate and a polymer electrolyte membrane intermediate are laminated, by removing the organic solvent remaining in the layer containing an ion conductive polymer with passing the laminate film 1 obtained in the step (ii) in a drying furnace; wherein the residence time of the laminate film 1 in the drying furnace in the step (iii) is 50 minutes or shorter and the remaining organic solvent concentration in the polymer electrolyte membrane intermediate in the laminate film 2 immediately after the laminate film 2 passes through the drying furnace is 40% by weight or lower.