▎ 摘　　要

NOVELTY - Preparing a graphene-based dielectric elastomer composite material involves adjusting the pH of water with trimethylolaminomethane solid to 8.5, and adding dopamine to obtain a dopamine aqueous solution. The high dielectric ceramic particles are added into dopamine aqueous solution and stirred mechanically. The mixture is diluted with deionized water to neutral after the completion of reaction, and subjected to suction and vacuum drying to obtain solid polybutamine coated high dielectric ceramic packing. USE - Method for preparing graphene-based dielectric elastomer composite material (claimed). ADVANTAGE - The method enables to prepare graphene-based dielectric elastomer composite material, which effectively increases the dielectric constant of the dielectric elastomer along with maintaining the smaller dielectric loss, solves the problem that the filling amount of the ceramic filler filled with the elastic body is high, has large elastic modulus and large dielectric loss, and has low breakdown strength. DETAILED DESCRIPTION - Preparing a graphene-based dielectric elastomer composite material involves adjusting the pH of water with trimethylolaminomethane solid to 8.5, and adding dopamine to obtain a dopamine aqueous solution. The high dielectric ceramic particles are added into dopamine aqueous solution and stirred mechanically. The mixture is diluted with deionized water to neutral after the completion of reaction, and subjected to suction and vacuum drying to obtain solid polybutamine coated high dielectric ceramic packing. Graphene oxide is then disperses in deionized water to obtain an aqueous solution of graphene oxide. Polybutadiene-coated high dielectric ceramic filler is added in the aqueous solution of enriched graphene, stirred mechanically, the mixture is diluted with deionized water to a neutral pH after the completion of reaction, and then subjected to suction and vacuum drying to obtain multilayered core-shell graphite alkenyl dielectric filler. The multilayered core-shell oxide-based dielectric filler is put into aqueous ammonia solution of hydrazine hydrate and stirred mechanically. The mixture is diluted with deionized water to a neutral pH after the completion of reaction, and subjected to suction and vacuum drying to obtain graphene-based dielectric filler having multilayered core-shell structure. The multi-layer core-shell structure of the graphene-based dielectric filler is added to a rubber matrix, along with adding curing agent, mixed uniformly in a two-roll mill to form a rubber paste, and then subjected to vulcanization on a flat vulcanization machine to obtain graphene-based dielectric elastomer composite, which has multilayered core-shell structure.