Flexible polymer dielectric material for electrical condenser and preparation thereof

Abstract

The invention relates to a flexible polymer dielectric material used for a capacitor and the preparation thereof. The material is the blending material of fluorine-containing polymer and nylon, wherein, the fluorine-containing polymer is any one of polyvinylidene fluoride, vinylidene fluoride- trifluoroethylene copolymer and vinylidene fluoride-tetrafluoroethylene copolymer; the nylon is any one of PA7, PA9, PA11, PA7/ PA9, PA7/PA11, PA9/PA11 and PA7/ PA9/PA11. The volume ratio between the nylon and the fluorine-containing polymer is 10%-90%: 90%-10%. The preparation steps comprises: 1) under the condition that the temperature is 150-230 DEG C and the rotating speed is 15-50r/min, the nylon and the fluorine-containing polymer are mixed in mixing equipment according to the volume ratio of 10%-90%: 90%-10%, and then the mixture is cooled naturally; 2) the mixture obtained in the step 1) is pressed for shaping in a mould, the mould pressing temperature is 150-230 DEG C, the mould pressing pressure is 10-25MPa, and the pressing time is 15-30min; the pressed mixture is cooled when in pressure maintaining, so that the flexible polymer dielectric material is obtained. The flexible polymer dielectric material has good mechanical property and higher dielectric constant; the property needed by the material can be adjusted by regulating the mixture ratio between the nylon and the fluorine-containing polymer, so that the invention is especially suitable for preparing film dielectric material.

Description

technical field [0001] The invention relates to a flexible dielectric material for capacitors and a preparation method. In particular, it relates to a flexible polymer dielectric material for capacitors and a preparation method thereof. technical background [0002] Dielectric materials, as a kind of functional materials with unique functions and wide applications, play an irreplaceable role in industries such as electronics, motors and cables due to their good ability to store charges and uniform electric field. Especially in recent years, with the rapid development of electronic equipment, capacitors are also developing in the direction of high energy storage, miniaturization, environmental friendliness and flexible molding. Flexible dielectric materials with good flexibility, flexible processing, and good dielectric properties have become the focus of current research. [0003] At present, flexible dielectric materials are mainly ceramic and polymer composites. This ma...

AI Technical Summary

Problems solved by technology

This dielectric material can solve the problems of poor bonding and poor mechanical properties of the two-phase interface of the current ceramic / polymer composite material, and is a new type of flexible high-dielectric material.

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