Preparation method of bismuth ion functional graphene agricultural film

A preparation method of a bismuth ion functional graphene agricultural film, comprising:

• (1) preparation of an oil-based bismuth ion graphene material:
• adding 100 grams (g) of flake graphite powder and 4 g of a chelated bismuth ion solution to a reaction kettle, and then adding 776 g of DTPA to the reaction kettle followed by adjusting a pH of 6 for reaction with a pressure of 0.1 MPa at a temperature of 30° C. for 8 h to obtain a reacted mixture, and adding 100 g of a EDTA solution as an impact agent to the reacted mixture for reaction at 30° C. for 4 h to obtain the oil-based bismuth ion graphene material;
• (2) mixing:
• adding the oil-based bismuth ion graphene material and colloidal particles to a mixer, and then stirring the oil-based bismuth ion graphene material and the colloidal particles followed by drying to obtain a mixed material for later use;
• (3) granulating:
• adding the mixed material obtained in the step (1) to an extruder, and then melting the mixed material to obtain a melted material, compounding the melted material to obtain a compounded material, extruding the compounded material followed by cooling to obtain a cooled material, and granulating the cooled material followed by drying to obtain functional masterbatches;
• and
• (4) film blowing:
• adding the functional masterbatches to a film-blowing machine followed by blowing to obtain the bismuth ion functional graphene agricultural film.