Flexible variable capacitor and method for preparation thereof

Abstract

Provided are a flexible variable capacitor and method for preparation thereof. The flexible variable capacitor includes two highly conductive flexible electrode layers and an elastomer dielectric insulation layer disposed between the two highly conductive flexible electrode layers, wherein the highly conductive flexible electrode layers include first polymeric elastomer and carbon nanomaterial, and the elastomer dielectric insulation layer includes second polymeric elastomer and functional ceramic nanoparticles. The method for preparation of the flexible variable capacitor is as follows: first, preparing an elastomer composite film with different functions, and then pressing upper and lower electrode layers with the intermediate elastomer insulation layer together to obtain a stretchable strip-shaped plate capacitor. Different from existing technologies, the present application uses independently developed highly conductive flexible electrodes to replace traditional silver oil electrodes, which greatly reduces the cost of variable capacitor devices, and enhances the integration and operability. The prepared flexible variable capacitor has characteristics such as high dielectric constant, low dielectric loss, simple preparation process, and capacitance being sensitive to deformation.