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Preparation method of high energy storage dielectric composite material based on PMMA (poly methyl methacrylatemethacrylic acid) sandwich structure

A composite material and high energy storage technology, applied in the direction of coating, etc., can solve the problem that the electrical performance of single-layer composite materials is not significantly improved, and achieve the effects of improving overall performance, improving electrical performance, and increasing breakdown field strength

Inactive Publication Date: 2018-11-06
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the shortcomings of the single-layer composite material in the prior art that the electrical performance is not significantly improved, the present invention provides a method for preparing a high-energy-storage dielectric composite material based on a PMMA sandwich structure

Method used

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  • Preparation method of high energy storage dielectric composite material based on PMMA (poly methyl methacrylatemethacrylic acid) sandwich structure
  • Preparation method of high energy storage dielectric composite material based on PMMA (poly methyl methacrylatemethacrylic acid) sandwich structure
  • Preparation method of high energy storage dielectric composite material based on PMMA (poly methyl methacrylatemethacrylic acid) sandwich structure

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Step (1). According to the ratio of 100g per liter, polymethyl methacrylate PMMA particles are dissolved in DMF analysis pure solvent, fully stirred until completely dissolved to form a PMMA solution.

[0032] Step (2). Adopting solid phase method to prepare particle diameter R is 10nm, material is PbZrO 3 Antiferroelectric ceramic fillers for ceramic materials.

[0033] Add the ceramic filler to 20% hydrogen peroxide at a ratio of 100g / L, stir thoroughly, oscillate ultrasonically, and cycle 10 times, then wash with absolute ethanol, and dry at 80°C for 10 hours to complete the surface of the ceramic filler. activation.

[0034] Add the ceramic filler after surface activation to absolute ethanol at a ratio of 100g / L, add solid dopamine whose mass is 10% of the ceramic filler, stir well, oscillate ultrasonically, cycle 10 times, and dry at 80°C for 10h to complete the surface Modification; remove ceramic filler.

[0035] Step (3). According to the ratio of 100g per li...

Embodiment 2

[0042] Step (1). According to the ratio of 50g per liter, polymethyl methacrylate PMMA particles are dissolved in NMP analytically pure solvent, and fully stirred until completely dissolved to form a PMMA solution.

[0043] Step (2). Adopting hydrothermal method to prepare particle size R is 5nm, material is PbZrTiO 3 For antiferroelectric ceramic filler of ceramic material, add the ceramic filler to 5% hydrogen peroxide at a ratio of 50g / L, fully stir, ultrasonically oscillate, and cycle 5 times, then wash with absolute ethanol, at 100°C Dry for 1 hour to complete the surface activation of the ceramic filler;

[0044] Add the surface-activated ceramic filler to absolute ethanol at a ratio of 50g / L, add a 98% KH550 solution whose mass is 1% of the ceramic filler, stir well, vibrate ultrasonically, cycle 5 times, and dry at 100°C 1h, complete the surface modification; remove the ceramic filler.

[0045] Step (3). According to the ratio of 50g per liter, the P(VDF-CTFE) based ...

Embodiment 3

[0051] Step (1). According to the ratio of 200g per liter, the polymethyl methacrylate PMMA particles are dissolved in DMAC analytical pure solvent, and fully stirred until completely dissolved to form a PMMA solution.

[0052] Step (2). Adopting the sol-gel method to prepare the particle diameter R is 50nm, the material is the antiferroelectric ceramic filler of La-doped PLZT ceramic material, and the ceramic filler is added to the concentration of 30% hydrogen peroxide, and the addition ratio is 200g / L, fully stirred, ultrasonically oscillated, cycled 20 times, then washed with absolute ethanol, and dried at 50°C for 20 hours to complete the surface activation of the ceramic filler;

[0053] Add the surface-activated ceramic filler to absolute ethanol at a ratio of 200g / L, add solid dopamine whose mass is 0.1% of the ceramic filler, stir thoroughly, ultrasonically oscillate, cycle 20 times, and dry at 50°C for 20h to complete the surface Modification; remove ceramic filler....

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Abstract

The invention relates to a preparation method of a high energy storage dielectric composite material based on a PMMA (poly methyl methacrylatemethacrylic acid) sandwich structure. Current monolayer composite materials do not improve electrical property obviously. The method comprises the following steps: dissolving polymethyl methacrylate particles in a polarity solution firstly to form a PMMA solution; carrying out surface activation on an antiferroelectric ceramic filler with grain sizes ranging from 1 nm to 100 nm by using an activating agent, and carrying out surface modification on the ceramic filler by using a coupling agent; adding a polymer into the polarity solution to form a polymer solution; adding the ceramic filler subjected to surface modification into the polymer solution toform suspension liquid; coating a basement membrane with the PMMA solution, coating the basement membrane with the suspension liquid after drying, then coating the basement membrane with the PMMA solution again after drying, and forming a membrane with a three-layer structure after drying; carrying out fusion, quenching and hot-pressing treatment to obtain a finished membrane. The polymer layerson upper and lower surfaces improve breakdown field strength, the interlayer of the composite material improves dielectric constants and electric displacement, the advantages of two kinds of materials are considered simultaneously, and the performance of the membrane is improved.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing a high-energy-storage dielectric composite material based on a PMMA sandwich structure. Background technique [0002] With the rapid development of science and technology, capacitors with high energy storage density have been widely used in the electric power and electronics industries. As a basic passive component and energy storage device, capacitors play an important role in advanced electronic and power systems such as fixed power grids, electronic weapons, hybrid vehicles, etc., based on polymers with high electrical strength, adding Fillers with excellent dielectric properties can integrate the respective advantages of two-phase or multi-phase materials to obtain dielectric composite materials with high energy storage density for capacitors. Such research ideas have become a research hotspot in recent years. However, despite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C09D133/12C09D7/62C09D127/16
CPCC08J5/18C08J2327/16C08J2333/12C08K9/02
Inventor 汶飞叶剑飞李丽丽王高峰刘晓阳王路文吴薇
Owner HANGZHOU DIANZI UNIV
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