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A polymer-based dielectric material with ceramic lamella orientation distribution and preparation method thereof

A technology of dielectric materials and polymers, applied in the field of preparation of polymer-based dielectric materials, can solve problems such as low dielectric constant and hindering energy storage density, and achieve the effect of increasing dielectric constant and dielectric energy storage density

Active Publication Date: 2021-02-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low dielectric constant of existing polymer-based composite materials has become a key constraint factor hindering the improvement of its energy storage density.

Method used

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  • A polymer-based dielectric material with ceramic lamella orientation distribution and preparation method thereof
  • A polymer-based dielectric material with ceramic lamella orientation distribution and preparation method thereof

Examples

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Embodiment 1

[0023] This embodiment provides a method for preparing a polymer-based dielectric material with a ceramic lamellar orientation distribution, which includes the following steps:

[0024] Step 1: Add ceramic powder with a two-dimensional flake shape to the amination solution, stir at 50-90°C for 3-5 hours, filter with suction after cooling, wash with deionized water for two to three times, and dry , realize the amination of the surface of the ceramic powder, wherein the ceramic powder includes BN, BaTiO 3 Lamellar, LiNb 0.6 Ti 0.5 o 3 Lamellar, BaBi 4 Ti 4 o 15 Lamellar, Bi 4 Ti 3 o 12 One of the plate crystals, the amination solution is chitosan solution or 3-aminopropyltriethoxysilane solution, and the concentration of the amination solution is 0.5wt%-2wt%, the ceramic powder and The mass volume ratio of the amination solution is 5:100g / ml to 30:100g / ml.

[0025] Step 2: Add a sulfonating agent to the polymer microspheres, stir at 25-90°C for 2-6 hours, then filter w...

Embodiment 2

[0033] This embodiment provides a method for preparing a polymer-based dielectric material with a ceramic lamellar orientation distribution, which includes the following steps:

[0034] The first step: take by weighing 2g chitosan, add to 198g concentration successively in the acetic acid solution of 1wt% in batches, be mixed with the chitosan solution that concentration is 1wt%; Weigh 10g BaTiO 3 Lamellar, slowly added to the above chitosan solution, and kept stirring, after complete addition, the above mixture was placed in a water bath at 80°C and continued to stir for 3 hours, after cooling, suction filtered, washed with deionized water for two to three times, and dried dry, realize the amination of the surface of the ceramic powder;

[0035] Step 2: Add 200 g of concentrated sulfuric acid to 20 g of PS microspheres with an average particle size of 50 μm, stir at 40°C for 4 hours, then filter with suction, wash with absolute ethanol for 3 times, and dry in an oven to reali...

Embodiment 3

[0043] The difference between this embodiment and embodiment 2 is that the BaTiO described in the first step 3 BN, LiNb for lamellar 0.6 Ti 0.5 o 3 Lamellar, BaBi 4 Ti 4 o 15 Lamellar, Bi 4 Ti 3 o 12 A kind of replacement in lamellar, others are identical with embodiment 2.

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Abstract

A polymer-based dielectric material with a ceramic lamella orientation distribution and a preparation method thereof. The method is to aminate the surface of ceramic powder, then sulfonate the surface of resin microspheres, and combine the surface sulfonated polymer microspheres with deionized After mixing with water, add aminated ceramic powder and stir, and add glutaraldehyde solution drop by drop, keep warm, wash and dry to obtain composite powder, put it in a mold, and hot press to obtain a polymer with ceramic sheet crystal orientation distribution Base medium material, compared with the prior art, the present invention covers the surface of polymer microspheres with sheet-like ceramic powder to form polymer microsphere / ceramic plate crystal composite powder with core-shell structure, which is polymerized during the molding process The melting deformation of the microspheres produces torsional force on the flake composite powder, realizes the orientation distribution of the flake ceramic powder in the composite material, greatly improves the dielectric constant of the composite material, and then increases its dielectric energy storage density, which is small Provide material and technical support for the development of dielectric energy storage devices.

Description

technical field [0001] The invention relates to the technical field of preparation of a polymer-based dielectric material, in particular to a polymer-based dielectric material with ceramic lamella orientation distribution and a preparation method thereof. Background technique [0002] Polymer-based dielectric materials are one of the hotspots in the field of dielectric energy storage. Because they can store electrical energy and release high-power energy pulses instantly when needed, they can be used in controllable nuclear fusion and high-power microwave weapons. , electromagnetic catapults, electric vehicles and other fields have attractive application prospects. However, the low dielectric constant of existing polymer-based composite materials has become a key constraint factor hindering the improvement of its energy storage density. The invention discloses a method for preparing a polymer-based dielectric material with orientation distribution of ceramic lamellar crysta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L25/06C08L33/12C08L27/16C08K9/04C08K9/06C08K7/00C08K3/38C08K3/22
CPCC08K3/22C08K3/38C08K7/00C08K9/04C08K9/06C08K2003/385C08L25/06C08L27/16C08L33/12
Inventor 叶枫张标钟兆新叶健刘强叶凯高晔
Owner HARBIN INST OF TECH
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