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High specific surface area graphene aggregate and preparation method thereof, graphene electrostatic conductive coating and preparation method thereof

A high specific surface area, graphene technology, applied in conductive coatings, coatings, etc., can solve problems such as limited applications, and achieve the effects of slow solvent volatilization, excellent electrical conductivity, and high stability

Active Publication Date: 2021-07-27
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of slurry with low graphene content will introduce a large amount of solvent during use, which seriously limits its application in the fields of plastics and solvent-free coatings, and runs counter to my country's current environmental protection policy

Method used

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  • High specific surface area graphene aggregate and preparation method thereof, graphene electrostatic conductive coating and preparation method thereof
  • High specific surface area graphene aggregate and preparation method thereof, graphene electrostatic conductive coating and preparation method thereof
  • High specific surface area graphene aggregate and preparation method thereof, graphene electrostatic conductive coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment approach

[0093]As a first embodiment of the present invention, a graphene aggregate with a high specific surface area is provided, and the aggregate includes graphene, a dispersant, a stabilizer and a solvent with a low volatilization rate. Wherein, the content of graphene is 10wt%-30wt%, for example: 10wt%, 11wt%, 12wt%, 15wt%, 18wt%, 20wt%, 22wt%, 25wt%, 28wt%, 29wt%, 30wt%, etc. The content of dispersant is 10wt%-30wt%, for example: 10wt%, 11wt%, 12wt%, 15wt%, 18wt%, 20wt%, 22wt%, 25wt%, 28wt%, 29wt%, 30wt%, etc. The content of the stabilizer is 0.1wt%-10wt%, for example: 0.1wt%, 0.2wt%, 0.3wt%, 0.5wt%, 0.8wt%, 1.0wt%, 2wt%, 3wt%, 5wt%, 8wt%, 9wt%, 9.2wt%, 9.5wt%, 9.8wt%, 9.9wt%, etc. The content of low volatilization rate solvent is 30wt%-80wt%, for example: 30wt%, 31wt%, 32wt%, 34wt%, 36wt%, 38wt%, 40wt%, 42wt%, 45wt%, 48wt%, 50wt%, 52wt% , 55wt%, 58wt%, 60wt%, 62wt%, 65wt%, 68wt%, 70wt%, 72wt%, 75wt%, 78wt%, 79wt%, 80wt%, etc. The specific surface area of ​​graphene is greater...

Embodiment 1A

[0107] This example shows a preparation process of graphene aggregates with high specific surface area.

[0108] Step 1): Provide the following raw materials:

[0109] Graphene (specific surface area is 463m 2 / g) 2kg

[0110] Acrylate block copolymer 2kg

[0111] Bentonite 0.1kg

[0112] Absolute ethanol 95.9kg

[0113] Step 2): Prepare the first solution:

[0114] Mix graphene, acrylate block copolymer, bentonite and absolute ethanol, put the mixed solution in a disperser and stir for 20 minutes, the disperser speed is 800rpm; then use a horizontal sand mill to grind to the particle size Less than 10 μm, the first solution is obtained.

[0115] Step 3): Prepare the second solution:

[0116] Choose diethylene glycol butyl ether to mix with the first solution as low volatilization rate solvent, the mass ratio of the first solution and diethylene glycol butyl ether is 100:2.6, then the mixing of diethylene glycol butyl ether and the first solution The solution was place...

Embodiment 1B

[0119] This embodiment shows the method for preparing graphene conductive electrostatic coating by using the high specific surface area graphene aggregates prepared by the method of Example 1A.

[0120] Step 1): Mix the following ingredients:

[0121] Acrylic resin solution 120g

[0122] Cellulose acetate butyrate solution 16g

[0123] Polyamide wax 2g

[0124] High specific surface area graphene aggregates 2g

[0125] Silicone grease 0.4g

[0126] Leveling agent 0.2g

[0127] Butyl acetate 30g

[0128] Xylene 28.8g

[0129] Wherein, the acrylic resin in the acrylic resin solution accounts for 50 wt%, and the solvent in the acrylic resin solution is xylene. The cellulose acetate butyrate accounts for 20 wt% of the cellulose acetate butyrate solution, and the solvent is butyl acetate.

[0130] Step 2): The mixed solution obtained in step 1) was placed in a disperser and stirred for 1 hour, and the rotational speed of the disperser was 1500 rpm to obtain an electrostatic...

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Abstract

The invention provides a graphene aggregate with a high specific surface area and a preparation method thereof, a graphene conductive electrostatic coating and a preparation method thereof. The graphene content in the high specific surface area graphene aggregate is 10wt%-30wt%. The preparation method of the graphene aggregate with high specific surface area comprises: first dispersing graphene in a highly volatile solvent, then mixing the high volatile solvent dispersed with graphene with a low volatile solvent, and then separating the high volatile solvent by distillation. Volatile solvents can obtain high specific surface area graphene aggregates, and the high specific surface area aggregates are in a semi-solid state. The high specific surface area graphene aggregate provided by the invention has high graphene content, uniform dispersion, more convenient use and better stability, and can be uniformly dispersed by simple stirring.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a graphene aggregate with high specific surface area and its preparation method, preparation process and application. The method and process are suitable for the production of graphene aggregates with high content and high specific surface area. Background technique [0002] As a new type of material, graphene has many superior properties, such as high strength, good electrical conductivity, high specific surface area, excellent thermal conductivity, etc.; therefore, it has potential potential in the fields of high-performance nanoelectronic devices, field emission materials, reserves, and sensors. Value. However, due to the high specific surface area of ​​graphene, there is van der Waals force between layers of graphene material, so it is easy to agglomerate; in practical applications, graphene material needs to be dispersed in the medium, but graphene material is hydrophobic an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D5/24C09D133/04
CPCC08K2201/001C08K2201/006C09D5/24C09D133/04C08K3/042
Inventor 杨修宝郑雅轩刘天祥成涛
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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