Preparation method of super-hydrophilic BO-PET film

The invention belongs to the technical field of polymeric membranes, and relates to a preparation method of a super-hydrophilic BO-PET film, which comprises the following steps: firstly, carrying out ultrahigh pressure cracking on amylose to prepare graphene quantum dots, then activating the surface of the BO-PET film, immersing the BO-PET film into a mixed solution of a solvent B, a site coupling agent and a catalyst, carrying out ultrasonic dispersion, and cleaning to form click chemical sites on the surface of the BO-PET film; finally, electrophilic addition of the graphene quantum dots and nucleophilic groups on the surface of the BO-PET film is completed under the action of an initiator through ultraviolet irradiation, the surface of the film is washed with ethyl alcohol till no residues exist on the surface, and ethyl alcohol is drained off. The amylose is used as a carbon source precursor to prepare the graphene quantum dot, the raw material source is wide, the cost is low, the reaction condition is mi