Preparation method of polybutyrate adipate terephthalate (PBAT) composite material

The invention provides a preparation method of a polybutyrate adipate terephthalate (PBAT) composite material, and relates to the technical field of material preparation. The preparation method comprises the steps of firstly, dissolving dry PBAT into a solvent, and mixing the obtained solution with acetylated nanocrystalline cellulose to obtain a premixed material; removing the solvent in the premixed material, and then carrying melt blending and extruding by using a double-screw extruder so as to obtain the PBAT composite material. After the technology is adopted, the completely biodegradable composite material is prepared, the good dispersity of the acetylated nanocrystalline cellulose in the PBAT is guaranteed, the mechanical properties of the PBAT are improved, and the application space of the PBAT is enlarged.