Aluminum sol composite polyimide powder paint and preparation method thereof

The invention discloses aluminum sol composite polyimide powder paint. The aluminum sol composite polyimide powder paint is prepared from the following raw materials in parts by weight: 0.6 to 1 part of sodium carboxymethyl cellulose, 0.3 to 1 part of 8-hydroxyquinoline, 2 to 4 parts of oxidized polyethylene wax, 100 to 110 parts of polyimide, 10 to 14 parts of graphite fluoride, 0.1 to 0.3 part of potassium persulfate, 1 to 2 parts of sodium nitrate, 0.1 to 0.4 part of potassium permanganate, 4 to 6 parts of sebacic acid, 0.5 to 1 part of phosphorus pentoxide, 0.1 to 0.2 part of dicyclohexylcarbodiimide, 0.1 to 0.2 part of 4-dimethylaminopyridine, 4 to 7 parts of aluminum isopropoxide, 1 to 2 parts of pyromellitic dianhydride, 0.6 to 1 part of didecyl dimethyl ammonium bromide, 0.8 to 1 part of nickel aminosulfonate, 3 to 4 parts of mannitol and a proper amount of dimethylformamide, sulfuric acid and absolute ethyl alcohol. The aluminum sol composite polyimide powder paint takes the aluminum isopropoxide as a precursor and obtained sol can be effectively improved the dispersity of filling between polymers, and the stability and surface strength of finished product are improved.