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A kind of graphene heat dissipation coating and preparation method thereof

A heat-dissipating coating and graphene technology, applied in the field of coatings, can solve problems such as poor heat dissipation, poor heat transfer performance, and low infrared radiation rate, and achieve increased space infrared radiation area, good heat transfer performance, and high heat transfer performance Effect

Active Publication Date: 2020-03-17
深圳天元羲王材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a graphene heat-dissipating coating and a preparation method thereof, aiming at solving the problems of existing graphene coatings with low infrared radiation rate, poor heat transfer performance and poor heat dissipation

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  • A kind of graphene heat dissipation coating and preparation method thereof

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preparation example Construction

[0033] Based on above-mentioned graphene heat-dissipating coating, the present invention also provides a kind of preparation method of graphene heat-dissipating coating, wherein, as figure 1 shown, including the following steps:

[0034] S1. Mix the resin, graphene, functional filler, dispersant, leveling agent, colorant and solvent uniformly according to a predetermined ratio to obtain a mixed slurry;

[0035] S2. Add zirconium beads into the mixed slurry according to the mass ratio of the ball to material at a ratio of 1:1, and perform ball milling on the mixed slurry at a predetermined speed in a planetary sand mill to obtain a graphene heat dissipation coating. . Preferably, the rotational speed of the ball milling treatment is 40-600 rpm, and the time is 100-150 min.

Embodiment 1

[0038] Graphene heat dissipation coating includes: 6g N-type high-purity graphene (average number of layers is 4 layers, sheet diameter 5μm, thickness 2.86nm), 2g functional graphene, 3.5g spherical alumina powder (particle size 50nm), 4g carbon fiber (tube diameter 5-20nm, average tube length 3-15μm), 5.5g of carbon black, 35g of water-based silicone modified acrylic resin, 2g of acrylate polymer dispersant, 1.5g of leveling agent, 12g of amino resin, Propylene glycol methyl ether 2.5g, isobutanol 17g, water 9g.

[0039] The preparation method of described graphene heat dissipation coating comprises the steps:

[0040] 1. Weigh 6g N-type high-purity graphene powder (average number of layers is 4 layers, sheet diameter 5μm, thickness 2.86nm), 2g functional graphene, 3.5g spherical alumina powder (particle size 50nm), 4g carbon fiber (tube diameter 5-20nm, average tube length 3-15μm), 35g silicone acrylic resin, 2g acrylate polymer dispersant, 1.5g leveling agent, 5.5g carbon bl...

Embodiment ２

[0046] Graphene heat dissipation coating includes: 4gN-type high-purity graphene (average number of layers 5 layers, sheet diameter 10μm, thickness 3nm), 4g functional graphene, 6g aluminum nitride powder, 1g carbon fiber (tube diameter 5-20nm, average tube length 3-15μm), 2g alumina fiber, 8g orange pearl powder, 48g water-based acrylic resin, 3g dispersant, 2g leveling agent, 0.1g defoamer, 5.9g industrial ethanol, 16g water

[0047] The preparation method of described graphene heat dissipation coating comprises the steps:

[0048] 1. Weigh 4g N-type high-purity graphene (average number of layers is 5 layers, sheet diameter 10μm, thickness 4nm), 4g functional graphene, 5.9g industrial ethanol, 16g water and 2g acrylate polymer dispersant and stir In the dispersion plate; adjust the mixer speed to 1300rpm / min, and the time is 24 hours to obtain the composite graphene dispersion;

[0049] 2. Add 6g aluminum nitride powder (3000 mesh), 1g carbon fiber (diameter 5-20nm, average...

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Abstract

The invention discloses graphene-containing heat-dissipating coating and a preparation method. The graphene-containing heat-dissipating coating comprises the following components in percent by weight:35-55% of resin, 1-15% of graphene, 5-10% of a functional filler, 0.5-1.5% of a leveling agent, 0.05-0.2% of a defoaming agent, 1-3% of a dispersing agent, 3-10% of a coloring agent and 10-40% of a solvent. High-heat dissipation and high-radiation N-type high-purity graphene, high-radiation dielectric loss functional graphene and the functional filler are combined according to a specific mass ratio so as to promote formation of a non-gravity stacking bridging structure through graphene radiation and a filler structure; defects in the internal space of coating are increased, so that the coating is endowed with higher heat transfer performance; the area of spatial infrared radiation is increased, so that the radiation emissivity and the radiation absorptivity achieve the optimal radiation effect, the infrared heat radiation is enhanced, the coating with high radiation and high heat transfer performance is formed, and thus the heat uniformizing effect of a substrate facing the coating isachieved.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a graphene heat dissipation coating and a preparation method thereof. Background technique [0002] At present, the materials commonly used in mainstream heat dissipation coatings are mainly aluminum nitride, silicon carbide, hexagonal boron nitride, alumina, graphite, graphene and modified graphene. Some coatings focus on their own heat conduction effect, but ignore the low efficiency of natural convection heat transfer and high heat radiation in the coating application environment; some coatings focus on the heat radiation of the coating and ignore the heat exchange between the substrate and the coating , facing local hot spots formed by heat accumulation, high application temperature; even paying attention to the performance of coatings and ignoring the environmental pollution caused by them. [0003] Most infrared radiation materials, which emit infrared rays, are mainly related to t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D133/04C09D161/20C09D5/32C09D7/61C09D133/00C09D167/00C09D183/04
CPCC08K3/04C08K7/08C08K7/18C08K7/24C08K2003/282C09D5/32C09D133/00C09D143/04C09D167/00C09D183/04C08L61/20C08K13/04C08L83/12
Inventor 陈稳城
Owner 深圳天元羲王材料科技有限公司
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