PMMA/PVDF composite film and preparation method thereof

Abstract

The invention relates to a PMMA/PVDF composite film and a preparation method thereof, and belongs to the technical field of polymer-based dielectric materials. The problems that a conventional polymer-based dielectric material is low in breakdown field intensity and energy storage density are solved. The invention provides the PMMA/PVDF composite film which is prepared by blending and hot-pressinga linear polymer PMMA and a ferroelectric polymer PVDF, wherein the volume percentage of PMMA in the composite film is 25-75 vol%. The prepared composite film has good dielectric constant, breakdownfield strength of 570 kV/mm, energy storage density of 20.08 J/cm<3>, and low loss and leakage current density. Compared with a traditional polymer-based dielectric material, the composite film has the breakdown probability obviously reduced, has good insulating property, can be applied to manufacturing of energy storage devices, and has the energy storage and breakdown characteristics of dielectric capacitors improved.

Description

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