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High-breakdown-strength polyvinylidene fluoride-based polymer film material and preparation method thereof

A polyvinylidene fluoride, polymer film technology, applied in the field of high breakdown strength polyvinylidene fluoride vinyl polymer film material and its preparation, can solve the problems of low electrical breakdown strength, etc., achieve high breakdown strength, expandable The effect of wide application conditions and significant economic value

Pending Publication Date: 2021-08-24
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a polyvinylidene fluoride-based polymer film material with high breakdown strength, and then at least to a certain extent overcome the problem of low electrical breakdown strength when PVDF polymers are used as dielectric energy storage materials. question

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  • High-breakdown-strength polyvinylidene fluoride-based polymer film material and preparation method thereof
  • High-breakdown-strength polyvinylidene fluoride-based polymer film material and preparation method thereof
  • High-breakdown-strength polyvinylidene fluoride-based polymer film material and preparation method thereof

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preparation example Construction

[0028] In this exemplary embodiment, a method for preparing a polyvinylidene fluoride-based polymer film material with high breakdown strength is firstly provided. refer to figure 1 As shown in, the preparation method may include:

[0029] S101: Polyvinylidene fluoride (PVDF) is used as the main component, and polymethyl methacrylate (PMMA) is used as the additive component, wherein the mass content of the polyvinylidene fluoride is 90% to 99%, and the polymethylmethacrylate The mass content of methyl acrylate is 1% to 10%;

[0030] S102: Mix the polyvinylidene fluoride and polymethyl methacrylate raw materials and fully dissolve them in N,N-dimethylformamide (DMF) solvent to form a mixed solution;

[0031] S103: uniformly coating the mixed solution on a clean glass plate, and then drying in an oven to form a polymer film;

[0032] S104: peeling off the dried polymer film from the glass plate;

[0033] S105: Perform heat treatment on the peeled polymer film.

[0034] In o...

Embodiment 1

[0040] A method for preparing a polyvinylidene fluoride-based polymer film material with high breakdown strength, comprising:

[0041] 1) Weighing: Weighing 99% and 1% of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA) raw materials according to the mass fraction;

[0042] 2) Prepare a mixed solution of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA), fully dissolve the weighed raw materials in step 1) in N,N-dimethylformamide (DMF), A uniform and stable mixed solution is formed by stirring and ultrasonic vibration, and the concentration of the solution is 100g / L.

[0043] 3) Film preparation: uniformly coat the mixed solution prepared in step 2) on a clean glass plate to form a film; place the glass plate and the film on it in an oven to dry at 80° C. for 1 hour.

[0044] 4) Peeling off the film: peeling off the film dried and cured in step 3) from the glass substrate.

[0045] 5) Heat treatment: heat-treat the stripped film obtained in s...

Embodiment 2

[0047] A method for preparing a polyvinylidene fluoride-based polymer film material with high breakdown strength, comprising:

[0048] 1) Weighing: Weighing 97% and 3% of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA) raw materials according to the mass fraction;

[0049] 2) Prepare a mixed solution of polyvinylidene fluoride (PVDF) and polymethyl methacrylate (PMMA), fully dissolve the weighed raw materials in step 1) in N,N-dimethylformamide (DMF), A uniform and stable mixed solution is formed by stirring and ultrasonic vibration, and the concentration of the solution is 100g / L.

[0050] 3) Film preparation: uniformly coat the mixed solution prepared in step 2) on a clean glass plate to form a film; place the glass plate and the film on it in an oven to dry at 80° C. for 1 hour.

[0051] 4) Peeling off the film: peeling off the film dried and cured in step 3) from the glass substrate.

[0052] 5) Heat treatment: heat-treat the stripped film obtained in ste...

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Abstract

The embodiment of the invention relates to a high-breakdown-strength polyvinylidene fluoride-based polymer film material and a preparation method thereof. The method comprises the following steps: taking polyvinylidene fluoride as a main component and polymethyl methacrylate as an additive component; mixing polyvinylidene fluoride and polymethyl methacrylate raw materials and fully dissolving in an N, N-dimethylformamide solvent to form a mixed solution, wherein the concentration of the solution is 100 g / L; evenly coating a clean glass plate with the mixed solution and then placing in a drying oven to be dried, and forming a polymer film, wherein the drying temperature is 80 DEG C, and the drying time is 1 hour; stripping the dried polymer film from the glass plate; and carrying out heat treatment on the stripped polymer film at the treatment temperature of 130-140 DEG C for 24 + / -2 hours. The polyvinylidene fluoride-based polymer film material prepared by the method has a uniform and compact structure, good transparency and flexibility, and also has very high breakdown strength.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of polymer dielectric materials, in particular to a polyvinylidene fluoride-based polymer film material with high breakdown strength and a preparation method thereof. Background technique [0002] Dielectric energy storage is considered to be a key technology for high-power and high-energy-density electrical energy storage because of its high power density, fast response, and low cost. The core of its technology lies in the research and preparation of dielectric energy storage materials. Polymer dielectric materials are widely used in the development of energy storage capacitors due to their high electrical breakdown strength, low processing temperature, good flexibility, simple process for preparing capacitors, and low cost, and have broad application prospects. For the energy storage dielectric, its energy storage density is roughly controlled by the dielectric constant (ε r ) an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L27/16C08L33/12
CPCC08J5/18C08J2327/16C08J2433/12
Inventor 路旭邓维朱亦松
Owner XIAN UNIV OF TECH