Stretchable filler doped flexible composite material with high dielectric constant

The invention discloses a stretchable filler doped high-dielectric-constant flexible composite material, which is prepared by the following preparation method: (1) preparing a gel precursor liquid: uniformly mixing a high-molecular polymer skeleton, a thermal initiator, a cross-linking agent and a high-dielectric-constant dispersion medium to form the gel precursor liquid; and (2) uniformly stirring and mixing the gel precursor liquid and mineral oil to prepare a stable emulsion, forming gel microparticles, and uniformly mixing and curing the gel microparticles with silicone rubber to obtain the flexible composite material. The adopted raw materials are cheap and easy to obtain, and the preparation conditions are mild. According to the invention, the doping of the gel flexible filler is a way which does not sacrifice the mechanical properties of the material and can significantly improve the dielectric constant of the material, the doping amount of the gel filler can reach 60% of the total mass at most, the d