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Aminated graphene water-based heat dissipation coating as well as preparation method and application thereof

A heat-dissipating coating and amination technology, applied in the direction of coating, can solve the problem of not significantly improving the thermal conductivity of composite materials, and achieve the effects of coating stability, improving heat-dissipating performance and reducing damage

Pending Publication Date: 2021-12-31
BEIJING TUNGHSU CARBON ADVANCED MATERIALS TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a problem of interfacial compatibility between inorganic filler particles and the organic matrix. Directly adding filler particles to the organic matrix cannot significantly improve the thermal conductivity of the composite material. It is necessary to modify the filler particles to improve the compatibility of the two-phase interface. Filler particles form thermally conductive pathways in the matrix

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  • Aminated graphene water-based heat dissipation coating as well as preparation method and application thereof

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preparation example Construction

[0063] Such as figure 1 Shown, the invention provides a kind of preparation method of aminated graphene water-based heat dissipation coating, it may further comprise the steps:

[0064] Preparation of S1 graphene dispersion slurry

[0065] 1) Preparation of modified graphene

[0066] Graphene oxide preparation: fluffy flake graphite and concentrated sulfuric acid (concentration is 98wt%), concentrated phosphoric acid (concentration is 85wt%), KMnO 4 (The ratio of the four is (1g): (110-120ml): (13-15ml): (5.8-6ml), preferably (1g): (112.5ml): (13.5ml): (6g), preferably after Graphene oxide has the least number of layers and the number of oxygen-containing functional groups) is placed in an ultrasonic water bath and reacted under mechanical stirring. After the reaction is completed, the unreacted oxides are reduced with hydrogen peroxide, and then centrifuged with hydrochloric acid and deionized water. Wash until the pH is 6.5-7, then wash with absolute ethanol, and dry the ...

Embodiment 1

[0087] The present embodiment provides a kind of preparation method of aminated graphene water-based heat-dissipating coating, comprising the following steps:

[0088] (1) Preparation of graphene dispersion slurry

[0089] 1) Preparation of modified graphene

[0090] The preparation of graphene oxide (GO) adopts the improved Hummers method. The detailed synthesis process is as follows: add 4g flake graphite to a three-neck flask equipped with a stirring device, turn on the mechanical stirring (700rpm), and slowly add 450mL concentrated sulfuric acid (concentration: 98wt %) and 54mL concentrated phosphoric acid (concentration is 85wt%), then slowly add 24g KMnO in the there-necked flask 4 , the temperature of the ultrasonic water bath should be adjusted in time (concentrated sulfuric acid and potassium permanganate are added to release heat and increase the temperature of the system). ) was turned on and reacted for 12 hours. When the system cools down to room temperature af...

Embodiment 2

[0102] The difference between this embodiment and embodiment 1 is that the addition amount of the graphene dispersion slurry is different, and the remaining steps and parameters are the same as in embodiment 1. A kind of preparation method of aminated graphene water-based heat-dissipating coating of the present embodiment, comprises the following steps:

[0103] (1) Graphene dispersion slurry is identical with embodiment 1.

[0104] (2) Preparation of graphene heat dissipation coating

[0105] Weigh 25g graphene dispersion slurry, 57.5g 789 resin, 2g deionized water, 1g defoamer BYK-028, 1g leveling agent BYK-381, 1g film forming agent dodecyl alcohol ester, 1g adhesion promoter 11.5g of water-based amino resin was added into the dispersion tank, and dispersed and stirred for 3h at a rotating speed of 1500rpm to obtain a water-based graphene heat-dissipating coating with a viscosity of 650mPa·s.

[0106] Before spraying, pre-treat the aluminum surface of the heating plate an...

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Abstract

The invention relates to an aminated graphene water-based heat dissipation coating as well as a preparation method and application thereof. The aminated graphene water-based heat dissipation coating comprises the following components in percentage by mass: 18-62% of water-based resin, 5-17% of water-based amino resin, 20-65% of graphene dispersion slurry, 2-10% of deionized water and 3-8% of a second aid. Aminated graphene is adopted as a heat dissipation filler and is prepared into graphene slurry, so that the dispersity of graphene in an organic matrix is improved, and the advantages of high heat conductivity and high electric conductivity of graphene are brought into full play. Meanwhile, the surface of the graphene is grafted with amino, so that the graphene can be used as a cross-linking agent of water-based acrylic resin, the coating is more stable, the performance is more excellent, and radiation heat dissipation and conduction heat dissipation can be effectively carried out on a radiator and a heater.

Description

technical field [0001] The invention belongs to the field of heat dissipation coatings, in particular to an aminated graphene water-based heat dissipation coating and its preparation method and application. Background technique [0002] Heat dissipation coatings are often used on the surface of heat dissipation components, high-power components, highly integrated components and other equipment to improve the heat dissipation capability of components and increase the service life of components. According to relevant statistical data, when the operating temperature of electronic components increases by 2 ℃, its reliability will drop by 10%, and the life at 50 ℃ is only 1 / 6 of that at 25 ℃, so the thermal management of components is very important to the service life of the equipment. Traditional heat dissipation coatings are all solvent-based, which not only emit a large amount of volatile organic compounds (VOCs), but also harm workers’ bodies. Therefore, water-based heat dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/00C09D161/20C09D7/62C09D7/61C09D7/20
CPCC09D133/00C09D7/62C09D7/61C09D7/20C08L61/20C08K9/06C08K3/042C08K3/041C08K3/04
Inventor 肖倩孙金梅
Owner BEIJING TUNGHSU CARBON ADVANCED MATERIALS TECH CO LTD
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