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A kind of preparation method of surface-modified graphene waterborne polyurethane anticorrosion coating

A technology for anti-corrosion coatings and surface modification, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve the problems of poor anti-corrosion effect, achieve the effects of not being easy to pulverize, reduce coating thickness, and improve wear resistance Effect

Active Publication Date: 2021-02-05
烟台华恒节能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of poor anticorrosion effect of existing waterborne polyurethane coatings, the present invention provides a preparation method of surface-modified graphene waterborne polyurethane anticorrosion coatings

Method used

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  • A kind of preparation method of surface-modified graphene waterborne polyurethane anticorrosion coating

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Embodiment 1

[0021] A preparation method for surface-modified graphene water-based polyurethane anticorrosion coating, comprising the following steps:

[0022] 1) Preparation of graphite oxide powder: immerse 10g of ground graphite powder in 200ml of concentrated nitric acid, soak for 1h at 0°C, cool down to -15°C, add 1ml of concentrated phosphoric acid and 40g of potassium ferrate, react at 60°C for 0.5h and then centrifuge , washing the filter cake with deionized water until the pH of the washing solution is 6-7, placing it in a vacuum drying oven, and drying at 70°C for 4 hours to obtain graphite oxide powder;

[0023] 2) Preparation of multilayer graphite powder: graphite oxide powder containing NaBH 4 and CaCl 2 After soaking in the solution for 10 hours, filter, wash the filter cake with deionized water, and then dry it in a drying oven at 60°C for 6 hours to obtain multilayer graphite powder;

[0024] 3) Preparation of modified graphene powder: soak the multilayer graphite powder...

Embodiment 2

[0029] A preparation method for surface-modified graphene water-based polyurethane anticorrosion coating, comprising the following steps:

[0030] 1) Preparation of graphite oxide powder: immerse 10g of ground graphite powder in 200ml of concentrated nitric acid, soak at 0°C for 1.5h, cool down to -15°C, add 1ml of concentrated phosphoric acid and 40g of potassium ferrate, react at 25°C for 14h and then centrifuge , washing the filter cake with deionized water until the pH of the washing solution is 6-7, placing it in a vacuum drying oven, and drying at 65°C for 5 hours to obtain graphite oxide powder;

[0031] 2) Preparation of multilayer graphite powder: graphite oxide powder containing NaBH 4 and CaCl 2 Soak in the solution for 9 hours and then filter, wash the filter cake with deionized water and dry it in a drying oven at 60°C for 6 hours to obtain multi-layered graphite powder;

[0032] 3) Preparation of modified graphene powder: soak the multilayer graphite powder obt...

Embodiment 3

[0037] A preparation method for surface-modified graphene water-based polyurethane anticorrosion coating, comprising the following steps:

[0038]1) Preparation of graphite oxide powder: immerse 10g of ground graphite powder in 200ml of concentrated nitric acid, soak at 0°C for 2h, cool down to -15°C, add 1ml of concentrated phosphoric acid and 40g of potassium ferrate, react at -10°C for 24h and then centrifuge , washing the filter cake with deionized water until the pH of the washing solution is 6-7, placing it in a vacuum drying oven, and drying at 60°C for 6 hours to obtain graphite oxide powder;

[0039] 2) Preparation of multilayer graphite powder: graphite oxide powder containing NaBH 4 and CaCl 2 Soak in the solution for 8 hours and then filter, wash the filter cake with deionized water and dry it in a drying oven at 60°C for 6 hours to obtain multi-layered graphite powder;

[0040] 3) Preparation of modified graphene powder: soak the multilayer graphite powder obtai...

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Abstract

The invention discloses a method for preparing a surface-modified graphene water-based polyurethane anti-corrosion coating, which comprises preparing graphite oxide powder, preparing multi-layer graphite powder, preparing modified graphene powder, preparing a modified graphene isocyanate composite solution, and preparing a modified graphene isocyanate composite solution. Isocyano trimers of permanent graphene and the preparation of two-component anti-corrosion coatings. The beneficial effect of the present invention is: the stable sp2 hybrid structure of graphite in the surface-modified graphene water-based polyurethane coating of the present invention is attached to the surface of the substrate, so that it can form a physical barrier layer between the substrate and the active medium to prevent diffusion and penetration It prevents the infiltration of corrosive factors such as water molecules, oxygen, and chloride ions, so that the coating has good weather resistance, durability, gloss retention and color retention, and is not easy to pulverize and yellow, and has good decorative properties.

Description

technical field [0001] The invention relates to polyurethane anticorrosion coatings, in particular to a method for preparing surface-modified graphene waterborne polyurethane anticorrosion coatings. Background technique [0002] Traditional polyurethane coatings also contain a large amount of organic solvents. Organic solvents are flammable, explosive, toxic and harmful to the environment, making traditional polyurethane coatings highly polluting and high-risk; water-based polyurethane coatings have the advantages of non-toxic, non-flammable, non-polluting, energy-saving, etc. . However, waterborne polyurethane is not as good as solvent-based polyurethane coatings in many properties such as chemical resistance, abrasion resistance, hardness, water resistance, etc. [0003] Graphene is a new two-dimensional (2D) layered material with a single-layer sheet structure composed of carbon atoms. It is a planar film with a hexagonal honeycomb lattice composed of C atoms with sp2 hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D5/08C09D7/62C08G18/79
CPCC08G18/791C08L2201/08C09D5/08C09D175/04C09D7/62C09D7/70C08K9/04C08K9/02C08K3/042C08K7/00
Inventor 任朋成
Owner 烟台华恒节能科技有限公司
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