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High-temperature-resistant heat dissipation coating and preparation method thereof

A heat-dissipating coating and high-temperature-resistant technology, applied in the coating field, can solve the problem that nano-carbon materials cannot obtain sufficient heat resistance, and achieve the effects of good crack resistance, good mechanical properties, flexibility and elasticity.

Active Publication Date: 2022-03-22
东莞市安宿泰电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Most of the heat dissipation coating materials that have been developed at present are mainly chemically modified nano-carbon materials. Because the shell structure of the chemically modified nano-carbon materials is damaged, the chemically modified nano-carbon materials cannot be used. Sufficient heat resistance is obtained, so the heat dissipation coating of the prior art cannot be applied to exert the required heat dissipation effect at a temperature above 400°C

Method used

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  • High-temperature-resistant heat dissipation coating and preparation method thereof
  • High-temperature-resistant heat dissipation coating and preparation method thereof
  • High-temperature-resistant heat dissipation coating and preparation method thereof

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Embodiment 1

[0045] This embodiment provides a method for preparing a high-temperature-resistant heat-dissipating coating, which specifically includes the following steps:

[0046] S1. Preparation of metal oxide nanopowder: Dissolve 4g of ferric nitrate, 13g of aluminum nitrate, and 1g of cobalt nitrate in 100mL of water, add 30g of citric acid, disperse with 1000W ultrasonic wave for 30min, heat to 45°C and evaporate for 1h to obtain a sol; then increase To 170°C, the vacuum degree is 0.01MPa, forming a xerogel, taking it out, igniting the xerogel, and obtaining metal oxide nanopowder;

[0047] S2. Preparation of polydopamine / metal oxide nanopowder: add 10g of metal oxide nanopowder prepared in step S1 to 100mL water, 2000W ultrasonic dispersion for 30min, add 17g dopamine hydrochloride, add 1g Tris- HCl solution, heated to 40°C and stirred for 3h, centrifuged at 3000r / min for 15min, washed with deionized water, and dried at 70°C for 4h to obtain polydopamine / metal oxide nanopowder; figu...

Embodiment 2

[0053] This embodiment provides a method for preparing a high-temperature-resistant heat-dissipating coating, which specifically includes the following steps:

[0054] S1. Preparation of metal oxide nanopowder: Dissolve 12g of ferric nitrate, 13g of aluminum nitrate, and 5g of cobalt nitrate in 100mL of water, add 40g of citric acid, disperse with 1000W ultrasonic wave for 30min, heat to 55°C and evaporate for 1h to obtain a sol; then increase To 200°C, the vacuum degree is 0.1MPa, forming a xerogel, taking it out, igniting the xerogel, and obtaining metal oxide nanopowder;

[0055] S2. Preparation of polydopamine / metal oxide nanopowder: add 10g of metal oxide nanopowder prepared in step S1 to 100mL water, 2000W ultrasonic dispersion for 30min, add 22g dopamine hydrochloride, add 2g Tris- HCl solution, heated to 50°C and stirred for 5h, centrifuged at 3000r / min for 15min, washed with deionized water, and dried at 70°C for 4h to obtain polydopamine / metal oxide nanopowder;

[0...

Embodiment 3

[0061] This embodiment provides a method for preparing a high-temperature-resistant heat-dissipating coating, which specifically includes the following steps:

[0062] S1. Preparation of metal oxide nanopowder: Dissolve 8g of ferric nitrate, 13g of aluminum nitrate, and 3g of cobalt nitrate in 100mL of water, add 35g of citric acid, disperse with 1000W ultrasonic wave for 30min, heat to 50°C and evaporate for 1h to obtain a sol; To 185°C, the vacuum degree is at 0.05MPa, to form xerogel, take it out, ignite the xerogel, and obtain metal oxide nanopowder;

[0063] S2. Preparation of polydopamine / metal oxide nanopowder: add 10g of the metal oxide nanopowder prepared in step S1 into 100mL water, 2000W ultrasonic dispersion for 30min, add 20g dopamine hydrochloride, add 1.5g Tris with a pH value of 8.2 -HCl solution, heated to 45°C and stirred for 4h, centrifuged at 3000r / min for 15min, washed with deionized water, and dried at 70°C for 4h to obtain polydopamine / metal oxide nanopo...

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Abstract

The invention provides a high-temperature-resistant heat dissipation coating and a preparation method thereof, and belongs to the technical field of coatings. Comprising the following steps: S1, preparing metal oxide nano powder; s2, preparation of polydopamine / metal oxide nano powder; s3, preparation of modified polydopamine / metal oxide nano powder; s4, preparing organic silicon modified silica sol; and S5, preparing the high-temperature-resistant heat dissipation coating. The high-temperature-resistant heat dissipation coating prepared by the invention has good mechanical properties, high temperature resistance, wear resistance, good crack resistance, good flexibility and elasticity, has self-heat dissipation and far infrared release effects, is applied to electronic devices, has a very good heat dissipation effect, can tolerate relatively high temperature, and has a wide application prospect.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-temperature-resistant heat-dissipating coating and a preparation method thereof. Background technique [0002] With the sophisticated design of electronic products, the operation process of electronic products is often accompanied by the generation of a large amount of heat energy. If the heat energy cannot be dissipated effectively, it will cause overheating problems in electronic products, and even affect their quality and reliability. [0003] In order to avoid the above-mentioned problems, most of the existing technologies are provided with cooling fins or fans on the heat source of the electronic product, in order to dissipate the heat source to the outside of the electronic product by increasing the surface area or increasing heat convection. However, providing cooling fins will increase the overall volume of the electronic product; and the fan will not only increas...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/62
CPCC09D1/00C09D5/18C09D7/62C09D7/70Y02P20/10
Inventor 余庚孙海坤李想
Owner 东莞市安宿泰电子科技有限公司
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