Ternary composite all-organic polypropylene-based high-energy-storage-density composite material and preparation method thereof

The invention discloses a ternary composite all-organic polypropylene-based high-energy-storage-density composite material and a preparation method thereof, and relates to the field of capacitors. The composite material comprises low-ash polypropylene, polyvinyl alcohol and composite grafted polypropylene. The composite grafted polypropylene is prepared by melting and blending acrylic acid grafted polypropylene and maleic anhydride grafted polypropylene according to the mass ratio of 1: 1, and the ash content of the low-ash polypropylene is 0.005% or below. The prepared ternary composite all-organic polypropylene-based high-energy-storage-density composite material has high dielectric constant and high breakdown field strength, when the composite material is applied to a dielectric material in a power capacitor, the energy storage density higher than that of pure PP can be obtained, and high charging and discharging efficiency can be kept. 本发明公开了一种三元复合全有机聚丙烯基高储能密度复合材料及其制备方法，涉及电容器领域。复合材料包括低灰分聚丙烯、聚乙烯醇、复合接枝聚丙烯；复