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Polypyrrole/polyvinylidene fluoride composite film with sandwich structure, and preparation method thereof

A technology of polyvinylidene fluoride and composite film, which is applied in chemical instruments and methods, conjugated synthetic polymer artificial filaments, synthetic resin layered products, etc., can solve the problems of low breakdown strength and decreased breakdown strength, etc. Achieve the effects of improving breakdown strength, improving dielectric properties, and high safety factor

Active Publication Date: 2021-12-14
HARBIN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

However, in order to alleviate the problem of decreased breakdown strength caused by the addition of fillers, it is necessary to design composite films with a sandwich structure
[0004] The present invention solves the technical problem of low breakdown strength caused by doping fillers; and provides a sandwich structure polypyrrole / polyvinylidene fluoride composite film and its preparation method

Method used

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  • Polypyrrole/polyvinylidene fluoride composite film with sandwich structure, and preparation method thereof
  • Polypyrrole/polyvinylidene fluoride composite film with sandwich structure, and preparation method thereof
  • Polypyrrole/polyvinylidene fluoride composite film with sandwich structure, and preparation method thereof

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Embodiment 1

[0030] Embodiment 1. In this implementation, the sandwich structure polypyrrole / polyvinylidene fluoride composite film is divided into three layers, the upper layer and the lower layer are polyvinylidene fluoride films, and the middle layer is a doped polypyrrole / polyvinylidene fluoride composite film.

[0031] Wherein, the content of doped polypyrrole doped in the middle layer accounts for 10wt%, 20wt%, 30wt%, and 40wt% of the middle layer polyvinylidene fluoride respectively;

[0032] The doped polypyrrole is titanium dioxide doped polypyrrole, wherein the content of polypyrrole is 5wt.%, and the content of titanium dioxide is 95wt.%.

[0033] The polyvinylidene fluoride films of the upper and lower layers were prepared by casting film. Put 20g of polyvinylidene fluoride and 120mL N,N dimethylformamide in a three-necked flask, heat and stir at 50°C for 2h, and the obtained Put the glue solution in a vacuum drying oven to evacuate to remove air bubbles, then spread the glue s...

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Abstract

The invention discloses a preparation method of a polypyrrole / polyvinylidene fluoride composite film with a sandwich structure, and belongs to the application field of high-energy-storage-density dielectric capacitors. The problem that the breakdown strength is too low due to filler doping is solved. The composite film is divided into three layers, the upper layer and the lower layer are polyvinylidene fluoride films, and the middle layer is a doped polypyrrole / polyvinylidene fluoride composite film. The upper layer and the lower layer are prepared by a tape casting method; the middle layer is prepared by adopting an electrostatic spinning method; and the sandwich structure composite film is obtained through a hot pressing method. By introducing the sandwich structure, the breakdown strength of the composite film is greatly improved, and the composite film has relatively low loss. The polypyrrole / polyvinylidene fluoride composite film with the sandwich structure has excellent energy storage performance, is simple and safe in design scheme, has good potential in the field of energy storage, and particularly has more obvious effects in the aspects of miniaturization, light weight and integration of electrical and electronic equipment.

Description

technical field [0001] The invention belongs to the application field of high energy storage density dielectric capacitors and specifically relates to a sandwich structure polypyrrole / polyvinylidene fluoride composite film and a preparation method thereof. Background technique [0002] Today, human consumption and dependence on energy are increasing day by day. How to effectively store energy and reduce energy loss has become a hot research topic. Due to the fast charging speed and high discharge rate, dielectric capacitors have high application value. However, the main disadvantage of dielectric capacitors is their low energy density, which cannot meet the growing demands of advanced applications. The dielectric layer of a dielectric capacitor is a polymer, so it is necessary to increase the energy storage density by developing polymer matrix composites with excellent dielectric properties. Typically, it can be achieved by adding ferroelectric or conductive fillers in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/30B32B27/08B32B27/02B32B27/28B32B27/18B32B37/06B32B37/10D01F8/16D01F8/10
CPCB32B27/304B32B27/12B32B5/02B32B37/06B32B37/10D01F8/16D01F8/10B32B2262/02B32B2250/40B32B2307/20
Inventor 翁凌邱金月关丽珠王小明
Owner HARBIN UNIV OF SCI & TECH
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