Inter-penetrated proton exchange membrane, method for manufacturing the same, and proton exchange membrane fuel cell utilizing the same

A method for forming an inter-penetrated proton exchange membrane, comprising:

• copolymerizing multi-maleimide and barbituric acid to form a hyper-branched polymer;
• replacing water of the sulfonated tetrafluorethylene copolymer aqueous solution with dimethyl acetamide (DMAc);
• adding 10 to 20 parts by weight of the hyper-branched polymer to 90 to 80 parts by weight of the sulfonated tetrafluorethylene copolymer in a DMAc solution to form a mixture;
• standing and heating the mixture to 50° C. to inter-penetrate the hyper-branched polymer and the sulfonated tetrafluorethylene copolymer, thereby forming an inter-penetrated polymer solution;
• coating the inter-penetrated polymer solution on a substrate;
• and
• baking and pre-treating the coating to remove residue DMAc for completing an inter-penetrated proton exchange membrane,
• wherein the multi-maleimide is represented by formula as below:
• wherein n is an integral of 0 to 4.