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Low-cost high-temperature-resistant graphene composite heat dissipation coating and preparation method thereof

A graphene composite and heat-dissipating coating technology, applied in fire-resistant coatings, coatings, etc., can solve the problems of poor heat-dissipating effect of coatings, high preparation cost, poor composite effect, etc., and achieve excellent heat-dissipating effect, simple preparation method, and uniform dispersion. Effect

Active Publication Date: 2021-09-24
戚薇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the poor dispersion of graphene in heat dissipation coatings and the poor composite effect with other materials, resulting in poor heat dissipation effects of coatings and high production costs, the present invention proposes a low-cost high-temperature resistant graphene composite heat dissipation coating and its preparation method, thereby effectively improving the dispersion of graphene in heat-dissipating coatings, making graphene and other heat-dissipating materials effectively compound to play a heat-dissipating effect, while the amount of graphene is small, the preparation cost is low, and it is easy to popularize and apply

Method used

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  • Low-cost high-temperature-resistant graphene composite heat dissipation coating and preparation method thereof
  • Low-cost high-temperature-resistant graphene composite heat dissipation coating and preparation method thereof
  • Low-cost high-temperature-resistant graphene composite heat dissipation coating and preparation method thereof

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Effect test

Embodiment 1

[0049] (1) 15kg of graphene oxide with an average particle size of 3μm, 15kg of aluminum powder with an average particle size of 25μm, 4kg of silicon nitride powder with an average particle size of 25μm, 18kg of boron nitride powder with an average particle size of 25μm, and 25kg with an average particle size of Add 30μm alumina powder and 0.65kg dispersant into the grinding machine, and then grind and disperse evenly in a dry state. Grinding and dispersing refers to the dry state ball milling process. The ball milling medium is 3mm zirconia balls. The ball-to-material ratio is 1:2. Rotating speed 40rpm, ball milling 28min, obtain pre-composite; Wherein, dispersing agent is compounded by stearic acid, sodium tripolyphosphate according to the mass ratio of 2:1;

[0050] (2) Transfer the pre-compound into a muffle furnace, then heat up and burn quickly. The temperature of the burn is controlled at 690°C, and burn for 4 minutes, so that the aluminum is melted and fixed to bond the...

Embodiment 2

[0054] (1) 12kg of graphene oxide with an average particle size of 2μm, 1.2kg of aluminum powder with an average particle size of 22μm, 4.5kg of silicon nitride powder with an average particle size of 22μm, 19kg of boron nitride powder with an average particle size of 22μm, and 28kg of average particle size Alumina powder with a diameter of 25 μm and 0.6 kg of dispersant are added to the grinder, and then ground and dispersed evenly in a dry state. Grinding and dispersing refers to a dry ball milling process. The ball milling medium is 3mm zirconia balls, and the ball-to-material ratio is 1:2. , ball milling speed 35rpm, ball milling 29min, to obtain a pre-composite; wherein, the dispersant is compounded by stearic acid and sodium tripolyphosphate according to a mass ratio of 2:1;

[0055] (2) Transfer the pre-composite into a muffle furnace, then heat up and burn quickly. The temperature of the burn is controlled at 685°C, and burn for 5 minutes, so that the aluminum is melted...

Embodiment 3

[0059] (1) 18kg of graphene oxide with an average particle size of 4μm, 1.8kg of aluminum powder with an average particle size of 28μm, 3.5kg of silicon nitride powder with an average particle size of 28μm, 16kg of boron nitride powder with an average particle size of 28μm, and 22kg of average particle size Alumina powder with a diameter of 35 μm and 0.7 kg of dispersant are added to the grinder, and then ground and dispersed evenly in a dry state. Grinding and dispersing refers to a dry state ball milling process. The ball milling medium is 3mm zirconia balls, and the ball-to-material ratio is 1:2. , ball milling speed 45rpm, ball milling 26min, to obtain a pre-composite; wherein, the dispersant is compounded by stearic acid and sodium tripolyphosphate according to the mass ratio of 2:1;

[0060] (2) Transfer the pre-compound into a muffle furnace, then heat up and burn quickly. The temperature of the burn is controlled at 695°C, and burn for 3 minutes, so that the aluminum is...

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Abstract

The invention relates to the technical field of graphene functional coatings, and provides the low-cost high-temperature-resistant graphene composite heat dissipation coating and the preparation method thereof.The composite heat dissipation coating is prepared by uniformly dispersing the graphene coated compound, methyl silicone resin, the composite solvent and hydroxyl silicone oil; wherein the graphene coated compound is prepared by grinding and dispersing graphene oxide, aluminum powder, silicon nitride powder, boron nitride powder, aluminum oxide powder and the dispersing agent to obtain the pre-compound, then transferring the pre-compound into the muffle furnace for fast firing to obtain the pre-coated compound, then performing grinding reaction on the pre-coated compound, the hydrazine hydrate solution and ammonithe water, and then performing filtering, washing and drying. According to the graphene composite heat dissipation coating provided by the invention, the graphene is uniformly dispersed, and meanwhile, the compounding effect of the graphene with the silicon nitride powder, the boron nitride powder and the aluminum oxide powder is good; the graphene is small in dosage and low in cost, has an excellent heat dissipation effect, is suitable for a heat dissipation surface resistant to 100-300 DEG C, and is easy to popularize and apply.

Description

technical field [0001] The invention relates to the technical field of graphene functional coatings, in particular to a low-cost high-temperature-resistant graphene composite heat-dissipating coating and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the electronics industry, especially the development of electronic components towards miniaturization, miniaturization and 5G technology, various electronic components are required to work at high frequency and high computing speed, and the assembly density of electronic components is also increasing. The higher the temperature, the heat will be generated by the operation of extremely small components, and the obvious increase in operating temperature will directly affect the service life and reliability of various electronic components and even equipment and instruments. In addition, with the development of new energy vehicles, the heat dissipation of lithium batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/62
CPCC09D183/04C09D5/18C09D7/62C08K2003/385C08K9/10C08K3/042C08K3/34C08K3/38C08K3/22
Inventor 陈庆曾军堂司文彬李钧
Owner 戚薇
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