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Graphene composite dry powder with high solid content and preparation method, epoxy zinc-rich coating and preparation method

A graphene composite, high solid content technology, applied in the field of nanomaterials, can solve problems such as unfavorable application and large solvent usage, and achieve the effects of long salt spray resistance, slow solvent volatilization rate, and easy dispersion.

Active Publication Date: 2021-12-14
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at one or more of the existing problems in the prior art, the present invention provides a two-step method for preparing graphene composite dry powder with high solid content, and prepares graphite with a high solid content of 10wt%-40wt% graphene Oxygen composite dry powder, the purpose is to solve the problem that the large amount of solvent used in the prior art is not conducive to the application in fields such as plastics and solvent-free coatings

Method used

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  • Graphene composite dry powder with high solid content and preparation method, epoxy zinc-rich coating and preparation method
  • Graphene composite dry powder with high solid content and preparation method, epoxy zinc-rich coating and preparation method
  • Graphene composite dry powder with high solid content and preparation method, epoxy zinc-rich coating and preparation method

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Experimental program
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Effect test

preparation example Construction

[0101] The preparation method of the graphene composite dry powder with high solid content is to disperse the graphene in the high volatilization rate solvent first, then mix the high volatilization rate solvent dispersed with graphene and the low volatilization rate solvent, and then separate the high volatilization rate solvent by distillation. solvent, the graphene composite dry powder with high solid content can be obtained. Specific steps are as follows:

[0102] S101: adding graphene, dispersant and stabilizer to a high-volatility solvent to disperse, stir and grind to obtain A solution;

[0103] S102: Add a low-volatility solvent to the A solution, disperse and stir, and obtain a B solution;

[0104] S103: distilling solution B to obtain graphene composite dry powder with high solid content.

[0105] Mix graphene, dispersant, stabilizer and high volatilization rate solvent, and disperse and grind graphene evenly in high volatilization rate solvent; then add low volati...

Embodiment approach

[0109] As a second embodiment of the present invention, an epoxy zinc-rich coating is provided, including: epoxy resin solution, bentonite, zinc powder, iron-titanium powder, graphene composite dry powder with high solid content, polyamide wax slurry , polyethylene wax, xylene and n-butanol. The mass ratio of epoxy resin solution, bentonite, zinc powder, iron-titanium powder, graphene composite dry powder with high solid content, polyamide wax paste, polyethylene wax paste, xylene and n-butanol is 25:2.5:30:30: (2.5-10):0.5:1:7:3. The epoxy resin in the epoxy resin solution accounts for 75 wt%, and the solvent is a mixed solution of xylene and n-butanol. Compared with the previous use of low-content graphene composite slurry, epoxy zinc-rich coatings use high-solid-content graphene composite dry powder, which greatly reduces the amount of graphene material added; while high-solid-content graphene composite dry powder is half In solid state, graphene is well dispersed, only n...

Embodiment 1A

[0120] This example shows a preparation process of graphene composite dry powder with high solid content.

[0121] Step 1): Provide the following raw materials:

[0122]

[0123] Step 2): Prepare A solution:

[0124] Mix graphene, acrylate copolymer, bentonite and absolute ethanol, put the mixed solution into a disperser and stir for 20 minutes, the disperser speed is 800rpm; then use a horizontal sand mill to grind the solution to a particle size of less than 10 μm , to obtain A solution.

[0125] Step 3): Prepare B solution:

[0126] Mix solution A and low volatilization rate solvent at a ratio of 100:10, the low volatilization rate solvent is diethylene glycol butyl ether, then put the mixed solution of A solution and low volatilization rate solvent into a disperser and stir for 20 minutes, disperse The rotating speed of machine is 800rpm, obtains B solution.

[0127] Step 4): use the distillation equipment with condensing device to distill the B solution, set the dist...

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Abstract

The invention provides a graphene composite dry powder with high solid content and a preparation method thereof, an epoxy zinc-rich coating and a preparation method thereof. The high solid content graphene composite dry powder includes graphene, a dispersant, a stabilizer and a low volatilization rate solvent, and the graphene content is 10wt%-40wt%. The epoxy zinc-rich coating includes epoxy resin, bentonite, zinc powder, iron and titanium powder, the high solid content graphene composite dry powder, polyamide wax slurry, polyethylene wax slurry, xylene and n-butanol. The high solid content graphene composite dry powder provided by the invention has high graphene content, is convenient for storage, has good dispersion performance, and can be dispersed evenly by simply stirring.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a preparation method, preparation process and application of a graphene composite dry powder with high solid content. The method and process are suitable for the production of graphene composite dry powder with high solid content. 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 materials, so it is easy to agglomerate; in practical applications, graphene materials need to be dispersed in the medium, but graphene materials are hydrophobic and oleophobic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D7/62C09D163/00C09D5/10C09C3/04C09C1/46
CPCC09D7/62C09D163/00C09D5/106C09C3/041C09C3/04C09C1/46C08K2003/0893C08K2003/0856C08K2003/0881C01P2006/22C08L77/00C08L23/06C08K13/06C08K3/042C08K3/346C08K3/08
Inventor 杨修宝郑雅轩刘天祥成涛
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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