Preparation method of self-cleaning nano transparent heat-insulating coating

The invention relates to the technical field of glass coatings, and particularly discloses a preparation method of a self-cleaning nano transparent heat-insulating coating, which comprises the following steps: S1, preparing an acidic aqueous solution, and adding polyoxyethylene dinonyl phenyl ether and graphene; s2, adding titanate, zinc alkoxide, aluminum alkoxide and siloxane into the acidic aqueous solution, and reacting to obtain transparent composite nano sol; s3, spraying the transparent composite nano sol to the surface of the transparent substrate to form a primary coating; and S4, a dilute alkaline solution is sprayed to the primary coating, so that all components in the primary coating are condensed and crosslinked, and a transparent nano-film is generated on the surface of the transparent base material in situ. The self-cleaning nano transparent heat-insulating coating prepared by the preparation method has excellent visible light transmittance, durability, weather resistance, heat-insulating effic