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Oxidized graphene insulating heat-radiating coating and preparation method thereof

A heat-dissipating coating and graphene dispersion technology, which is applied in coatings, epoxy resin coatings, polyester coatings, etc., can solve problems such as unfavorable heat conduction networks, and achieve high heat dissipation efficiency, strong adhesion, and cost-saving effects

Active Publication Date: 2015-11-25
山东利特纳米新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to high thermal conductivity, graphene has high electrical conductivity. In order to maintain insulating properties, only a very small amount of graphene can be added, which is not conducive to the formation of a good thermal conductivity network.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of graphene oxide dispersion

[0031] First, the improved Hummers method was used to prepare graphite oxide, then, the graphite oxide was dispersed in deionized water, and the graphene oxide dispersion was obtained after ultrasonic dispersion at a power of 0.1W for 360 minutes, wherein the solid content of graphene oxide was 0.01%;

[0032] (2) Preparation of graphene oxide heat dissipation coating

[0033] Mix the graphene oxide dispersion prepared in step (1) of this embodiment with the water-based acrylic resin and stir evenly, wherein the mass ratio of the water-based acrylic resin to graphene oxide is 50:1.

Embodiment 2

[0035] (1) Preparation of phosphorylated graphene oxide dispersion

[0036] First, the improved Hummers method was used to prepare graphite oxide, then, graphite oxide was dispersed in deionized water, and a graphene oxide dispersion was obtained after ultrasonic dispersion at a power of 1W for 250min, wherein the solid content of graphene oxide was 0.05%; then , add phosphorylcholine to the above-mentioned graphene oxide dispersion liquid, ultrasonic 50min under the power 10W; Obtain the graphene oxide of phosphorylation modification, wherein the mass ratio of phosphide and graphene oxide is 5:2; Graphene oxide was added to the dispersion liquid solvent N,N-dimethylformamide, and ultrasonicated for 150 min at a power of 10W to obtain a graphene oxide dispersion liquid, wherein the solid content of graphene oxide was 0.05%;

[0037] (2) Preparation of graphene oxide heat dissipation coating

[0038] Mix the graphene oxide dispersion prepared in step (1) of this example with t...

Embodiment 3

[0040] (1) Preparation of phosphorylated graphene oxide dispersion

[0041] First, the improved Hummers method was used to prepare graphite oxide, then, graphite oxide was dispersed in deionized water, and a graphene oxide dispersion was obtained after ultrasonic dispersion at a power of 10W for 200min, wherein the solid content of graphene oxide was 0.1%; Graphene oxide dispersion liquid; Then, in above-mentioned graphene oxide dispersion liquid, add polyoxyethylene phosphate ester, ultrasonic 40min under power 200W; Obtain the graphene oxide of phosphorylation modification, wherein phosphide and graphene oxide mass ratio It is 5:3; the phosphorylated graphene oxide prepared is added in the dispersion liquid solvent hexamethyl triamine phosphate, and ultrasonic 100min is obtained under power 200W; Obtain graphene oxide dispersion liquid, wherein the solid content of graphene oxide is 0.15% ;

[0042] (2) Preparation of graphene oxide heat dissipation coating

[0043]Mix the...

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Abstract

The invention discloses an oxidized graphene insulating heat-radiating coating. The oxidized graphene insulating heat-radiating coating is characterized by being composed of, by weight, 300-30 parts of resin, 1 part of oxidized graphene and 100-10 parts of resin curing agent, and the oxidized graphene is synthesized by adopting an improved Hummers method or phosphorylated oxidized graphene modified by phosphide. The oxidized graphene insulating heat-radiating coating is prepared by mixing oxidized graphene dispersion liquid or phosphorylated oxidized graphene dispersion liquid prepared after dispersing oxidized graphene in a dispersion liquid solvent with resin and resin curing agent. By the oxidized graphene insulating heat-radiating coating, the problem that insulativity and thermal conductivity of existing materials are difficult to realize at the same time is solved.

Description

technical field [0001] The invention relates to the technical field of insulating and heat-dissipating materials, in particular to an ultra-thin graphene oxide insulating and heat-dissipating coating with good bonding performance with a substrate and a preparation method thereof. Background technique [0002] At present, with the continuous development of miniaturization, miniaturization and integration technology of electronic components, timely heat dissipation has become an important factor affecting the service life of electronic components in order to ensure that electronic components can still work normally with high reliability. Limiting factors require thermally conductive materials to have sufficiently high thermal conductivity. For some heat dissipation coatings used in special occasions, such as electromagnetic shielding, electronic information, integrated circuits and weaponry, aerospace electronic equipment, motors, communications, electrical equipment, instrume...

Claims

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Application Information

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IPC IPC(8): C09D133/00C09D163/00C09D175/04C09D167/08C09D193/04C09D161/06C09D161/20C09D183/04C09D127/12C09D123/28C09D175/02C09D167/00C09D7/12C09D5/25
Inventor 孙明娟高赞徐兴
Owner 山东利特纳米新材料有限公司
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