Porous film and method for manufacturing the same

A method for manufacturing a porous film, comprising:

• using a ternary mixed solvent to dissolve a structural material and an auxiliary structural material, so as to obtain a mixed solution;
• wherein, based on a total weight of the ternary mixed solvent being 100 phr, the ternary mixed solvent includes 28 phr to 38 phr of ethanol, 25 phr to 42 phr of isopropanol, and 25 phr to 40 phr of acetone;
• wherein the structural material is selected from the group consisting of nitrocellulose, polyvinylidene fluoride, polysulfone, and any combination thereof;
• wherein the auxiliary structural material is selected from the group consisting of cellulose acetate, polylactic acid, poly(lactic-co-glycolic acid), poly-(D)glucosamine, and any combination thereof;
• adding water into the mixed solution to obtain a film-forming solution;
• coating the film-forming solution onto a carrier substrate to form a wet film;
• and
• vaporizing the ternary mixed solvent and the water to form the porous film on the carrier substrate.