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Graphene modified resin packaging material and preparation method thereof

A technology of graphene modification and resin encapsulation, which is applied in encapsulation/impregnation, coil manufacturing, inductance/transformer/magnet manufacturing, etc. It can solve the problem of expensive, inability to guarantee the bending strength and heat dissipation performance of epoxy resin, and no advantages of industrialization, etc. problems, to achieve the effect of satisfying electrical performance, improving mechanical performance and heat dissipation performance, heat dissipation performance and strength improvement

Inactive Publication Date: 2020-08-14
新疆烯金石墨烯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention enables conductive nanofillers to be evenly dispersed in epoxy resin by controlling the stirring and mixing conditions of conductive nanofillers and epoxy resins. Although it can improve the breakdown strength and dielectric properties, it cannot guarantee the durability of epoxy resins. Bending strength and heat dissipation performance, especially when more expensive additives or additives are used in the preparation process, there is no industrial advantage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0069] The preparation method of above-mentioned graphene modified resin encapsulation material, comprises the following steps:

[0070] S10 prepares graphene resin dispersion liquid:

[0071] After the graphene powder is heated and dehumidified, mixed with epoxy resin and dispersant, stirred at high speed, and grinded to obtain a stable graphene resin dispersion;

[0072] S20 Preparation of component A:

[0073] Add bisphenol A type epoxy resin, toughening agent and silicon micropowder successively to described graphene resin dispersion liquid, after mixing uniformly, obtain described A component;

[0074] S30 prepare graphene modified resin encapsulation material:

[0075] Add a curing agent, an accelerator and a toughening agent to the component A in sequence, and stir under vacuum conditions at 50-65° C. until no large amount of foam is generated to obtain the graphene-modified resin encapsulation material.

[0076] Preferably, in the step S10, the temperature of heatin...

Embodiment 1

[0090] The specific operation steps are as follows:

[0091] (1) prepare graphene powder:

[0092] In the ice-water mixture, add 10g flake graphite into 320mL concentrated sulfuric acid, while stirring with an electric stirrer, slowly add 30g potassium permanganate, control the reaction temperature below 5°C, and keep it warm for 2h.

[0093] Slowly add 0.1 g of potassium ferrate to the mixed solution under stirring condition and raise the temperature to 45° C. and keep it warm for 5 hours to obtain a dark green liquid.

[0094] Gained dark green liquid was added into 640ml of deionized water and stirred and mixed evenly, then 20ml of hydrogen peroxide with a mass fraction of 30% was added; 500ml of 5% hydrochloric acid and deionized water were used successively for the mixed solution, and washed by a ceramic membrane filter , and repeat the washing process until the conductivity of the exhausted acid is reduced to below 100 us / cm to obtain a graphene oxide feed liquid.

[0...

Embodiment 2

[0105] The specific operation steps are as follows:

[0106] (1) Preparation of graphene powder:

[0107] In the ice-water mixture, add 10g flake graphite into 320mL concentrated sulfuric acid, while stirring with an electric stirrer, slowly add 30g potassium permanganate, control the reaction temperature to less than 5°C, and keep it warm for 1h.

[0108] Slowly add 0.1 g of potassium ferrate to the mixed solution under stirring condition and raise the temperature to 45° C. and keep it warm for 10 hours to obtain a dark green liquid.

[0109] Gained dark green liquid was added into 640ml of deionized water and stirred and mixed evenly, then 20ml of hydrogen peroxide with a mass fraction of 30% was added; 500ml of 5% hydrochloric acid and deionized water were used successively for the mixed solution, and washed by a ceramic membrane filter , and repeat the washing process until the conductivity of the exhausted acid is reduced to below 100 us / cm to obtain a graphene oxide fee...

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Abstract

The invention relates to a graphene modified resin packaging material and a preparation method thereof. The invention discloses a graphene modified resin packaging material. The graphene modified resin packaging material is formed by combining a component A and a component B according to the mass ratio of 1: (0.9-1.4), wherein the component A is prepared from 18 to 25 parts by weight of bisphenolA type epoxy resin, 0.5 to 2 parts by weight of a toughening agent, 1 to 10 parts by weight of a graphene resin dispersion liquid and 48 to 52 parts by weight of silica powder; and the component B comprises the following components in parts by weight: 15-25 parts of a curing agent, 0.05-0.15 part of an accelerant and 1-5 parts of a toughening agent. The invention relates to a graphene modified resin packaging material and a preparation method thereof. Through graphene pre-dispersion treatment, controllable graphene layer number and sheet diameter, and components, a formula and a preparation method of the graphene modified resin packaging material for a dry-type transformer, the graphene modified resin packaging material has a good heat dissipation effect while meeting the electrical performance.

Description

technical field [0001] The invention belongs to the technical field of resin materials, and in particular relates to a graphene-modified resin packaging material and a preparation method thereof. Background technique [0002] Dry-type transformers are mainly composed of four parts: iron core, high-voltage coil, low-voltage coil, and epoxy resin package. Among them, the commonly used package layer material is mainly epoxy resin. Epoxy resin is a widely used chemical The raw material has flame retardant, flame retardant and superior electrical properties, and its insulation strength is higher than that of air and transformer oil. The transformer coil after pouring and molding has high mechanical strength, excellent moisture-proof and dust-proof performance, and is widely used in urban power grids. Especially for places with high fire protection and safety requirements. [0003] At present, when the dry-type transformer is running, the coil winding and iron core produce copper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/14H01F41/00H01F41/12C04B111/92
CPCC04B26/14H01F41/127H01F41/005C04B2111/00844C04B2201/50C04B2111/92
Inventor 杨新伟曾艳王国伟王俊强鲁娜卢科伟
Owner 新疆烯金石墨烯科技有限公司
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