Enhancing Impregnation Properties of Hydrocarbon Polymer Electrolytes for Fabricating Reinforced Composite Membranes
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The reinforced composite membrane, composed of a porous substrate and an ionomer, was developed to overcome the limitations of non-reinforced membranes. Its mechanical properties and durability rely on the effective impregnation of the polymer electrolyte into the substrate. This study aims to enhance impregnation properties in hydrocarbon-based reinforced membranes. The impregnation properties of the polymer electrolyte were assessed by measuring haziness and gas permeability, and its distribution within the porous substrate was verified through cross-sectional analysis using scanning electron microscopy (SEM). Two techniques were used to enhance impregnation: substrate pretreatment and adding a promoter to the electrolyte solution. Both methods reduced haziness and gas permeability, with cross-sectional analysis confirming three distinct layers, indicating uniform ionomer distribution within the porous substrate.