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Graphene-containing insulated radiating composition and preparation and application thereof

A technology of graphene and composition, which is applied in the field of insulating and heat-dissipating compositions, can solve problems such as difficulty in having both insulation and thermal conductivity, achieve good thermal conductivity, widen application space, and improve mechanical properties

Active Publication Date: 2014-05-21
XIAMEN KNANO GRAPHENE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that both insulation and thermal conductivity of existing materials are not easy to have at the same time, and propose a kind of insulation and heat dissipation composition containing graphene and its preparation and application

Method used

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  • Graphene-containing insulated radiating composition and preparation and application thereof
  • Graphene-containing insulated radiating composition and preparation and application thereof
  • Graphene-containing insulated radiating composition and preparation and application thereof

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preparation example Construction

[0031] The preparation method of the insulating and heat-dissipating composition containing graphene of the present invention specifically comprises the following steps:

[0032] (1) Using tetraethyl orthosilicate as raw material, add graphene and add water and ammonia water drop by drop in the process of ultrasonic and ultra-high-speed stirring. The dripping rate of the water and ammonia water is 0.5-1ml / min, so that the Ethyl ester is hydrolyzed on the surface of graphene, and then reacted at 50-70°C for 1-3 hours. The generated silicic acid is coated on the surface of graphene, and then dried at 120-150°C for 2-6 hours. hours, a silicon dioxide film is finally formed on the graphene surface;

[0033](2) After dissolving and diluting the surface treatment agent with a solvent, add it to the mixture of the insulating conductive filler and the above-mentioned modified graphene, and stir evenly. After the above mixture is fully mixed with functional additives, it is poured int...

Embodiment 1

[0038] (1) Take 15g of tetraethyl orthosilicate as raw material, add 15g of graphene microflakes (KNG-180-D031), add water and ammonia water drop by drop in the process of ultrasonic and ultra-high-speed stirring, and make ethyl silicate in graphite Hydrolyze the surface of alkene, then keep it warm at 60°C for 2 hours, the generated silicic acid is coated on the surface of graphene, and then dry at 130°C for 5 hours, and finally form a silicon dioxide film on the surface of graphene;

[0039] (2) Dilute 2g of silane coupling agent (KH792) with water and add to the mixture of 25g of needle-shaped zinc oxide, 30g of spherical alumina and the above-mentioned modified graphene, and stir evenly. After the above mixture is thoroughly mixed with 10g of phenolic resin and 10g of polyethylene glycol, it is poured into a ball mill for ball milling dispersion treatment to obtain a wet concentrated composition.

Embodiment 2

[0041] (1) Take 30g of tetraethyl orthosilicate as raw material, add 30g of graphene microflakes (KNG-180-D031) and add water and ammonia water drop by drop in the process of ultrasonic and ultra-high-speed stirring, so that ethyl silicate Hydrolyze the surface of alkene, then keep it warm at 60°C for 2 hours, the generated silicic acid is coated on the surface of graphene, and then dry at 130°C for 5 hours, and finally form a silicon dioxide film on the surface of graphene;

[0042] (2) Dilute 2g of silane coupling agent (KH792) with water and add to the mixture of 25g of needle-shaped zinc oxide, 30g of spherical alumina and the above-mentioned modified graphene, and stir evenly. After the above mixture is thoroughly mixed with 10g of phenolic resin and 10g of polyethylene glycol, it is poured into a ball mill for ball milling dispersion treatment to obtain a wet concentrated composition.

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Abstract

The invention discloses a graphene-containing insulated radiating composition and preparation and application thereof. The composition comprises the components of silica-coating graphene, insulated heat-conducting filler, a surface treating agent, and a function additive. The preparation method comprises the following steps of: hydrolyzing ethyl silicate on the graphene surface by the sol-gel method to obtain graphene coated with a silica film on the surface; adding the surface treating agent to a mixture of the insulated heat-conducting filler and modified graphene; uniformly agitating; then adding the function additive; and uniformly dispersing to obtain the insulated radiating composition. The composition has the advantages that the graphene is processed by insulating and coating, and the insulated heat-conducting filler and additive of other forms are coordinately added, thus the composition shows high radiating improvement effect in the plastic cement and coating fields; and the composition can be widely applied to a heating element and a radiating facility of various electronic products and electrical equipment, and can greatly improve the radiating effect as well as prolong the service life of devices.

Description

technical field [0001] The invention relates to a filler composition, in particular to a graphene-containing insulating and heat dissipation composition and its preparation and application. Background technique [0002] With the continuous development of miniaturization, miniaturization and integration technology of electronic components, the volume of electronic components has shrunk thousands of times, while the operating frequency has increased sharply, and the heat generated by electronic equipment has accumulated rapidly, which is difficult to diffuse and produces relatively extreme temperature. Therefore, in order to make electronic components work normally with high reliability at the ambient temperature, the ability to dissipate heat in time becomes an important limiting factor affecting their service life. [0003] At present, industrial production and the development of science and technology have put forward higher requirements for thermally conductive materials....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K9/10C08K9/06C08K9/04C08K3/04C08K3/22C08K3/34C09D7/12C09C1/46C09C3/12C09C3/06C09C3/04
Inventor 江龙迎邱淑璇洪江彬方崇卿赵立平
Owner XIAMEN KNANO GRAPHENE TECH CORP
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