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Surface treatment method of modified graphene, graphene finishing coat and preparation process

A technology of graphene surface and preparation process, which is applied in the direction of coatings and anti-corrosion coatings, can solve the problems of reducing the corrosion resistance of coatings, the arrangement of graphene is disorderly, and the dispersion of graphene does not achieve the desired effect, so as to improve anti-corrosion performance and The effect of anti-aging properties

Inactive Publication Date: 2020-09-25
CHINA RAILWAYS CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the graphene coatings on the market need to be added in a large amount to have a certain anti-corrosion effect. The dispersion of graphene has not achieved the desired effect, and the arrangement of graphene in the coating is disorderly. Many graphenes are not arranged in parallel, so graphite Graphene did not play a corresponding role, and even in some cases, the amount of graphene added inappropriately reduced the corrosion resistance of the coating.

Method used

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  • Surface treatment method of modified graphene, graphene finishing coat and preparation process
  • Surface treatment method of modified graphene, graphene finishing coat and preparation process
  • Surface treatment method of modified graphene, graphene finishing coat and preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, taking fluorocarbon topcoat as an example:

[0017] Weigh the following components according to the mass ratio and set aside

[0018]

[0019]

[0020] Preparation process: Mix part of the diluent and materials other than graphene evenly, and grind to the required fineness. Slowly add the remaining graphene while stirring, and finally adjust the solid content and viscosity with a diluent.

[0021] Plate-making test: Mix the prepared topcoat and curing agent evenly, spray it on the cleaned tinplate, control the dry film thickness at 60-80μm, and make a plate with the topcoat of the same formula without graphene Conservation under the same conditions is used as a blank sample and tested together. Among them, the dry film thickness of the chloride ion permeation-resistant coating is controlled at 250-300 μm, and the results are as follows:

[0022] serial number project blank sample Graphene topcoat 1 Adhesion MPa 6.1 7.2 2...

Embodiment 2

[0023] Embodiment 2, take the acrylic polyurethane finish paint as example:

[0024] Weigh the following components according to the mass ratio and set aside

[0025]

[0026]

[0027] Preparation process: Mix part of the diluent and materials other than graphene evenly, and grind to the required fineness. Slowly add the remaining graphene while stirring, and finally adjust the solid content and viscosity with a diluent.

[0028] Plate-making test: Mix the prepared topcoat and curing agent evenly, spray it on the cleaned tinplate, control the dry film thickness at 60-80μm, and make a plate with the topcoat of the same formula without graphene Conservation under the same conditions is used as a blank sample and tested together. Among them, the dry film thickness of the chloride ion permeation-resistant coating is controlled at 250-300 μm, and the results are as follows:

[0029] serial number project blank sample Graphene topcoat 1 Adhesion MPa 5....

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Abstract

The invention relates to a graphene finishing coat, which is composed of: modified graphene, resin, a pigment, a filler, a diluent, a dispersant, an ultraviolet absorbent, a coupling agent and a curing agent. The surface treatment method of the modified graphene comprises the following steps: uniformly mixing weighed Fischer-Tropsch wax, polyethylene wax and the coupling agent, heating the mixtureto 150 DEG C to a liquid state, adding few layers of graphene, and uniformly stirring the components; crushing the mixture, adding into 60-20-mesh torispherical quartz sand according to a ratio of 2-5%, and stirring the components; taking out the mixture, putting the mixture into cold water, enabling the graphene to float on the water surface, separating the graphene floating on the surface, anddrying the graphene at 45 DEG C for later use. According to the invention, a graphene surface treatment process is adopted to prepare the finish paint with the modified graphene, so that the graphenehas certain migration performance, and the corrosion resistance and aging resistance of the finish paint are greatly improved.

Description

Technical field: [0001] The invention relates to the technical field of coatings, in particular to a surface treatment method of modified graphene, a graphene topcoat with the modified graphene, and a preparation process of the graphene topcoat. Background technique: [0002] At present, the graphene coatings on the market need to be added in a large amount to have a certain anti-corrosion effect. The dispersion of graphene has not achieved the desired effect, and the arrangement of graphene in the coating is disorderly. Many graphenes are not arranged in parallel, so graphite Graphene does not play a corresponding role, and even in some cases, the amount of graphene added is not appropriate, but the corrosion resistance of the coating is reduced. Invention content: [0003] The invention provides a surface treatment method of modified graphene capable of greatly improving the anti-corrosion performance and anti-aging performance of the top paint, a graphene top paint with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/08C09D127/12C09D133/04
CPCC09D5/08C09D127/12C09D133/04C08K13/06C08K9/04C08K9/08C08K9/06C08K3/042
Inventor 赵利民贺海建杨继斌刘忠海
Owner CHINA RAILWAYS CORPORATION