Application method of photocuring-based graphene heat-dissipating coating

A technology of heat-dissipating coatings and graphene, which is applied to devices and coatings that coat liquids on the surface, and can solve the problems of demanding high-temperature resistance of substrate materials, poor electrical and thermal conductivity of coatings, and slow curing speed of thermosetting resins, etc. No problem, no requirement for high temperature resistance, good thermal conductivity, and reduced curing time

Inactive Publication Date: 2018-08-28
HUNAN GUOSHENG GRAPHITE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing graphene heat-dissipating coatings usually use the direct spraying method. In order to improve the mechanical properties of the coating, it is necessary to add an appropriate thermosetting resin, but the curing speed of the thermosetting resin is slow, which affects its use effect. At the same time, due to the curing temperature of the thermosetting resin Higher, strict requirements on the high temperature resistance of the base material
On the other hand, in the existing graphene heat-dissipating coatings, since graphene is easy to condense, it is dispersed unevenly in the coating, thus making the electrical and thermal conductivity of the coating poor.
In order to reduce the cohesion between graphene and improve the stability of graphene in heat-dissipating coatings, it is usually necessary to add chemical preparations such as polyethylene wax, polyvinyl chloride, and polyvinylpyrrolidone as dispersants or surfactants. Although adding the above-mentioned dispersants It can reduce the condensation between graphene to a certain extent, but the use of chemical agents volatilizes during the heat dissipation process, which is harmful to the human body and the environment

Method used

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Experimental program
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Effect test

Embodiment 1

[0034] The present embodiment provides a printing method based on light-cured graphene conductive ink, comprising the following steps:

[0035] S1. Prepare graphene heat dissipation coating:

[0036] S11. Mixing, grinding and shearing the graphene quantum dots, graphene, monomer and solvent under the action of ultrasound, the ultrasonic power is 1000W, and the time is 60min, to obtain a composite slurry material;

[0037] S12. After adding urea-formaldehyde resin, additives and carbon nanotubes to the composite slurry material prepared in step S11, stir at a speed of 1000 to 1200 rpm and a stirring time of 2 to 4 hours to obtain a graphene heat dissipation slurry;

[0038] S13. Add heat-conducting metal powder to the graphene heat-dissipating slurry obtained in step S12, fully stir, the rotating speed is 1200~1500rpm, and the stirring time is 2~3h. After mixing evenly, the graphene heat-dissipating coating is obtained;

[0039] Wherein, in step S1, the graphene heat dissipati...

Embodiment 2

[0048] The present embodiment provides a printing method based on light-cured graphene conductive ink, comprising the following steps:

[0049] S1. Prepare graphene heat dissipation coating:

[0050]S11. Mixing, grinding and shearing the graphene quantum dots, graphene, monomer and solvent under the action of ultrasound, the ultrasonic power is 1200W, and the time is 40min, to obtain a composite slurry material;

[0051] S12. After adding urea-formaldehyde resin, additives and carbon nanotubes to the composite slurry material prepared in step S11, stir at a speed of 1000 to 1200 rpm and a stirring time of 2 to 4 hours to obtain a graphene heat dissipation slurry;

[0052] S13. Add heat-conducting metal powder to the graphene heat-dissipating slurry obtained in step S12, fully stir, the rotating speed is 1200~1500rpm, and the stirring time is 2~3h. After mixing evenly, the graphene heat-dissipating coating is obtained;

[0053] Wherein, in step S1, the graphene heat dissipatio...

Embodiment 3

[0062] The present embodiment provides a printing method based on light-cured graphene conductive ink, comprising the following steps:

[0063] S1. Prepare graphene heat dissipation coating:

[0064] S11. Mixing, grinding and shearing the graphene quantum dots, graphene, monomer and solvent under the action of ultrasound, the ultrasonic power is 1100W, and the time is 50min, to obtain a composite slurry material;

[0065] S12. After adding urea-formaldehyde resin, additives and carbon nanotubes to the composite slurry material prepared in step S11, stir at a speed of 1000 to 1200 rpm and a stirring time of 2 to 4 hours to obtain a graphene heat dissipation slurry;

[0066] S13. Add heat-conducting metal powder to the graphene heat-dissipating slurry obtained in step S12, fully stir, the rotating speed is 1200~1500rpm, and the stirring time is 2~3h. After mixing evenly, the graphene heat-dissipating coating is obtained;

[0067] Wherein, in step S1, the graphene heat dissipati...

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Abstract

The invention relates to the technical field of coatings, and discloses an application method of a photocuring-based graphene heat-dissipating coating. A graphene quantum dot is introduced as an additive so as to be added into a graphene heat-dissipating coating, so that the dispersibility of graphene is further improved, the agglomeration is prevented, and compared with a high molecular surfactant and a dispersing agent, no new impurities can be introduced to reduce the electrical conductivity; and through the action of a photocuring agent on an ultraviolet light or a laser beam, organic monomers are chemically crosslinked or physically crosslinked to form a three-dimensional network-shaped structure, and the graphene is immediately wrapped and isolated by a polymer molecule or a polymermonomer, so that the generation of self-agglomeration of the graphene is effectively avoided, and the heat conductivity and the heat dissipation of the coating are improved.

Description

technical field [0001] The invention relates to the technical field of coatings, and more specifically, to a method for using a heat-dissipating coating based on light-cured graphene. Background technique [0002] As a new type of coating, heat dissipation coating not only has the basic function of decoration, but also has the effect of improving heat dissipation efficiency, and has received extensive attention and research. However, most of the heat-dissipating coatings currently on the market use expensive heat transfer media as fillers. The production process is complicated and the cost is high, which is not conducive to the mass production and large-scale application of coatings. [0003] Graphene is a carbon molecule composed of carbon atoms arranged in a hexagonal shape and connected to each other. Its structure is very stable, and it is a new type of nanomaterial with the thinnest, highest strength, and strongest electrical and thermal conductivity found so far. . T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24C09D4/06C09D4/02C09D7/61
CPCB05D7/24C09D4/06
Inventor 林前锋
Owner HUNAN GUOSHENG GRAPHITE TECH CO LTD
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