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A kind of highly dispersed graphene thermal conductivity masterbatch and preparation method

A graphene, high-dispersion technology, applied in the field of graphene materials, can solve the problems of easy agglomeration of graphene, and achieve the effect of easy dispersion, high thermal conductivity and stable properties

Active Publication Date: 2020-07-28
BEIJING INTERCONNECTED HARBOR TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the technical defect that graphene is easy to agglomerate in the graphene heat-conducting masterbatch in the prior art, the present invention proposes a high-dispersion graphene heat-conducting masterbatch and its preparation method, using silica airgel as the medium material to seal the graphene Put it in silica airgel, and then grind it into fine particles, thus effectively solving the problem of easy agglomeration of graphene, ensuring the uniform dispersion of graphene, and better exerting its excellent thermal conductivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Take 30 parts by weight of flake graphite powder, use a ball mill to peel off the graphite powder in methanol, set the speed of the ball mill to 1000 rpm, and the peeling time is 3 hours, add 2 parts of graphite powder stripping agent HTAB during the peeling process, and the graphite After the powder is peeled off and crushed by a ball mill, a graphene dispersion is obtained;

[0033](2) Add 10 parts by weight of tetraethyl orthosilicate to methanol, set the temperature of methanol at 30°C, and stir at 100 rpm, then add water and industrial waste acid in turn to adjust its pH to 3 Between, obtain silica airgel precursor solution, the ratio of described ethyl orthosilicate, methanol, water, industrial waste acid is 1:5:2:1×10 in molar ratio -5 , and then take 40 parts by weight of the graphene dispersion obtained in step (1) and add it to the silica airgel precursor solution, and stir evenly at a stirring speed of 200 rpm, and put the silica airgel precursor solution...

Embodiment 2

[0038] (1) Take 32 parts by weight of expanded graphite powder, use a ball mill to peel off the graphite powder in methanol, set the ball mill speed to 1500 rpm, and the peeling time is 3.5 hours, add 2.5 parts of graphite powder stripping agent TDOC during the peeling process, and the graphite After the powder is peeled off and crushed by a ball mill, a graphene dispersion is obtained;

[0039] (2) Add 15 parts by weight of methyl orthosilicate to ethanol, set the temperature of ethanol at 30-60°C and the stirring speed at 100-500 rpm, then add water and industrial waste acid in turn to adjust the Between the pH value and 3.5, the silica airgel precursor solution is obtained, and the ratio of methyl orthosilicate, ethanol, water, and industrial waste acid is 1:10:4:2×10 in molar ratio -5 , and then take 42 parts by weight of the graphene dispersion obtained in step (1) and add it to the silica airgel precursor solution, and stir evenly at a stirring speed of 300 rpm, and put ...

Embodiment 3

[0044] (1) Take 34 parts by weight of highly oriented graphite powder, use a ball mill to peel off the graphite powder in ethanol, set the speed of the ball mill to 1800 rpm, and the peeling time is 4.0 hours, add 3 parts of graphite powder stripping agent SDS during the peeling process, the After the graphite powder is peeled and crushed by a ball mill, a graphene dispersion is obtained;

[0045] (2) Add 15 parts by weight of propyl silicate to propanol, set the temperature of propanol at 39°C, and the stirring speed at 250 rpm, then add water and industrial waste acid in sequence, and adjust its pH value to Between 3.5, obtain silica airgel precursor solution, the ratio of described propyl silicate, propanol, water, industrial waste acid is 1:10:6:2.5×10 in molar ratio -5 , then take 30 parts by weight of the graphene dispersion obtained in step (1) and add it to the silica airgel precursor solution, stir evenly at a stirring speed of 400 rpm, and put the silica airgel precu...

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PUM

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Abstract

The invention provides high-dispersion graphene heat conduction master batch and a preparation method. According to the preparation method, ground and peeled graphene slurry is added into a precursor solution of silicon dioxide aerogel, then gelatination is performed, the graphene slurry is sealed and dried by aluminum hydroxide colloid, and the graphene is sealed into the silicon dioxide aerogel and then is ground and refined into fine particles; in microstructure, the graphene is among micropores of the silicon dioxide aerogel; in macroscopic structure, the graphene is large particles attached to the silicon dioxide aerogel; the high-dispersion graphene heat conduction master batch can be obtained by generally dispersing and adding carrier resin to granulate. The graphene master batch can effectively solve the problem that graphene is prone to agglomeration, can guarantee even dispersion of the graphene and can well give play to excellent heat conduction performance.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to a highly dispersed graphene heat-conducting masterbatch and a preparation method. Background technique [0002] Heat conduction and heat dissipation have significant application requirements in many fields such as electronics, communications, lighting, aviation, and national defense. The mainstream heat-conducting materials on the market are still mostly aluminum and copper metals or alloys, but their thermal conductivity is low, generally 300-500W / m K. Or alloy-based thermal conductive materials have more excellent thermal conductivity and light weight characteristics, and have great application prospects in the fields of rubber tire heat dissipation, LED lampshades and other electronic components heat dissipation, and have attracted people's attention and continue to be developed and utilized. [0003] Graphene is a planar carbon nanomaterial composed of a layer of carbon ato...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L81/02C08L23/06C08L23/12C08L25/06C08L81/06C08L71/00C08K13/04C08K3/04C08K3/36C08K5/09C08K7/24C08K7/26C08K5/10C08K5/41C08K5/42C08J3/22
CPCC08J3/22C08J2381/02C08J2423/06C08J2423/12C08J2425/06C08J2471/00C08J2481/06C08K3/04C08K3/36C08K5/09C08K5/10C08K5/41C08K5/42C08K7/24C08K7/26C08K13/04C08L23/06C08L81/02C08L23/12C08L25/06C08L81/06C08L71/00
Inventor 陈庆王镭迪曾军堂
Owner BEIJING INTERCONNECTED HARBOR TECH