A kind of graphene-based dielectric elastomer composite material and preparation method thereof

Abstract

The invention relates to a graphene-based dielectric elastomer composite material and a preparing method thereof. The composite material comprises an elastomer matrix, graphene oxide dielectric padding and a crosslinking system, wherein the graphene oxide dielectric padding is oxidation graphene with the surface wrapped by a poly-dopamine organic layer and is scattered in the elastomer matrix in a nanometer horizontal layer mode, and an isolation network structure that an oxidized graphene slice layer which is wrapped by the poly-dopamine organic layer wraps latex particles. According to the preparing method, the dopamine bionic ornament oxidization graphene is adopted, the dielectric loss is obviously reduced, the electric breakdown strength is improved, the organic layer thickness of the poly-dopamine can be regulated through the parameters of the modification process of the dopamine, the dielectric constant, the dielectric loss and the electric breakdown strength of the composite material can be adjusted according to the demands, and the graphene-based dielectric elastomer composite material meeting the safety requirement in the biology medical field can be prepared.

Description

technical field

[0001] The invention relates to a graphene-based dielectric elastomer composite material and a preparation method thereof, belonging to a conductive filler-doped dielectric elastomer and its preparation technology. The dielectric elastomer maintains a relatively high electrical sensitivity factor (β) At the same time, it has the performance of tunable low dielectric loss and high breakdown strength, which can be used for the development of electroactive polymer drivers. Background technique

[0002] Dielectric elastomer is a typical electroactive polymer, which has higher comprehensive properties than ordinary elastomers, including high dielectric constant, low modulus, large electro-induced deformation, high electromechanical coupling coefficient, and short response time , High energy density, small viscoelastic hysteresis loss. Electroactive polymer actuators developed with dielectric elastomers have broad application prospects in the fields of pocket or m...

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