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METHOD FOR PREPARING HOMOGENEOUSLY SULFONATED POLY (ETHER ETHER KETONE) MEMBRANES BY THE CASTING METHOD USING ORGANIC SOLVENTS
METHOD FOR PREPARING HOMOGENEOUSLY SULFONATED POLY (ETHER ETHER KETONE) MEMBRANES BY THE CASTING METHOD USING ORGANIC SOLVENTS
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机译:通过使用有机溶剂的铸造方法制备均相磺化的聚(醚酮)膜的方法
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摘要
The present invention relates to a method for preparing PEEK electrolyte membrane which is sulfonated homogeneously by employing organic solvent casting method. The method of preparing PEEK according to the present invention consists of steps of: dissolving the dried PEEK in methyl sulfonic acid solution; diluting the prepared solution with sulfuric acid for sulfonation; precipitating, filtering and washing the obtained material; dissolving the obtained material in organic solvents; and solidifying the obtained material. The methanol permeability of the membrane is lowered by 1/10 to that of Nafion, and the Young's modulus of the membrane is increased by about 10 times while the ion conductivity is maintained at a constant state by employing the present method. Further, the properties of the electrolyte membrane are affected by the type of organic solvent selected.
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