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A kind of magnesium oxide nanocrystal coated graphene-epoxy resin composite material and preparation method thereof

A technology of composite material and epoxy resin, which is applied in the field of magnesium oxide nanocrystal-coated graphene-epoxy resin composite material and its preparation, can solve the problems that the electrical insulation performance of packaging materials cannot be well satisfied, and achieve industrial production The effect of great potential, excellent insulation performance, and good thermal conductivity

Active Publication Date: 2016-10-26
湖州优研知识产权服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these fillers with high thermal conductivity have excellent electrical conductivity. Filling them into the resin matrix improves the electrical conductivity of the matrix, which cannot meet the requirements of packaging materials for electrical insulation properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A magnesium oxide nanocrystal-coated graphene-epoxy resin composite material is prepared by the following steps:

[0022] 1) Add 100mg of graphite oxide into 100ml of deionized water, ultrasonically disperse for 1 hour to obtain a graphene oxide solution, then add 2g of magnesium chloride hexahydrate (0.01mol) to it, raise the temperature to 80°C under stirring, and add 40ml of hydrogen dropwise to it Sodium oxide solution (20mg / ml), and heated to reflux for 12h, after the reaction was completed, suction filtration was performed after the reaction, and the obtained filtrate was dried at 80°C to obtain a gray-brown solid of magnesium hydroxide-coated graphene oxide; Add 100mg of magnesium hydroxide-coated graphene oxide into 100ml of deionized water, ultrasonically disperse for 1h, then add 1g of sodium borohydride, heat and reflux at 80°C for 6h under stirring conditions, filter with suction, and bake at 80°C Dry to get magnesium hydroxide-coated reduced graphene gray-b...

Embodiment 2

[0026] A magnesium oxide nanocrystal-coated graphene-epoxy resin composite material is prepared by the following steps:

[0027] 1) Add 240mg of graphite oxide to 480ml of deionized water, ultrasonically disperse for 0.5h to obtain a graphene oxide solution (0.5mg / ml), then add 240mg of magnesium sulfate (0.002mol) to it, and heat up to 60°C under stirring, Add 33ml of potassium hydroxide solution (10mg / ml) dropwise therein, and heat to reflux for 4h, perform suction filtration after the reaction is completed, and dry the obtained filtrate at 60°C to obtain magnesium hydroxide-coated graphene oxide ash Brown solid; take 200mg of magnesium hydroxide-coated graphene oxide and add it to 400ml of deionized water, ultrasonically disperse for 0.5h, then add 200mg of ethylenediamine, heat and reflux at 60°C for 6h under stirring conditions, and then filter with suction for 60 Dry at ℃ to obtain a gray-black solid of magnesium hydroxide-coated reduced graphene. Then, the magnesium hy...

Embodiment 3

[0031] A magnesium oxide nanocrystal-coated graphene-epoxy resin composite material is prepared by the following steps:

[0032] 1) Add 2.5g of graphite oxide into 500ml of deionized water, ultrasonically disperse for 2 hours to obtain a graphene oxide solution (5mg / ml), then add 75g of magnesium nitrate hexahydrate to it, heat up to 100°C under stirring, and dropwise Add 79ml of ammonia water (28wt%, density 0.89g / ml), and heat to reflux for 12h. After the reaction is completed, carry out suction filtration, and dry the obtained filtrate at 100°C to obtain gray-brown magnesium hydroxide-coated graphene oxide. Solid; add 2.5g of magnesium hydroxide-coated graphene oxide into 500ml of deionized water, ultrasonically disperse for 2h, then add 75g of hydrazine hydrate, heat and reflux at 100°C for 24h under stirring, then filter with suction and heat at 100°C Drying to obtain a gray-black solid of magnesium hydroxide-coated reduced graphene; then, under the protection of nitrogen, ...

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Abstract

The invention discloses a magnesium oxide nanocrystalline coated graphene-epoxy resin composite material and a preparation method thereof, aims to avoid the defects that the existing graphene packing in an epoxy resin matrix is low in heat conductivity coefficient and has no electrical insulating property, and provides an epoxy resin composite material with low electrical conductivity and high thermal conductivity. According to the preparation method disclosed by the invention, the magnesium oxide nanocrystalline coated graphene composite material is uniformly dispersed into epoxy resin and solidified and molded, the insulating property of magnesium oxide as well as the good thermal conductivity of magnesium oxide and graphene can be utilized to effectively reduce the electrical conductivity of epoxy resin and improve the heat conducting property of epoxy resin; furthermore, the dispersity of the magnesium oxide nanocrystalline coated graphene composite material is good in epoxy resin, so that the heat conductivity is good when the additive amount is low. The magnesium oxide nanocrystalline coated graphene-epoxy resin composite material prepared according to the preparation method disclosed by the invention has a huge application prospect in the electronic packaging material field.

Description

technical field [0001] The invention relates to an epoxy resin composite material with low electrical conductivity and high thermal conductivity, in particular to a magnesium oxide nanocrystal-coated graphene-epoxy resin composite material and a preparation method thereof. Background technique [0002] With the rapid development of my country's economic construction, various circuit devices continue to develop along the trend of integration and miniaturization. The problem caused by this is that electronic components are prone to generate a lot of heat during their work, which seriously affects the operation of circuit devices. Reliability, stability and service life etc. Therefore, in the field of packaging of electronic components, it is necessary to develop new electronic packaging materials with high thermal conductivity, so as to guide the waste heat of work to the environment in time without staying inside the equipment. Epoxy resin is one of the most widely used plast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08K9/00C08K3/04C08K3/22C08G59/40C08G59/42
Inventor 杜飞鹏沈天涵闫伟伟杨文张芳鄢国平李亮郭庆中
Owner 湖州优研知识产权服务有限公司
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