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Method for preparing surface-modified graphene waterborne epoxy resin anticorrosive coating

A technology of surface modification and epoxy resin, which is applied in the direction of epoxy resin coating, anti-corrosion coating, coating, etc., can solve the problems of poor anti-corrosion effect, achieve the effect of not easy to powder, good decoration, and improve wear resistance

Active Publication Date: 2019-08-23
YANTAI HENGNUO CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the problem of poor anti-corrosion effect of existing water-based epoxy resin coatings, and provides a preparation method of surface-modified graphene water-based epoxy resin anti-corrosion coatings

Method used

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  • Method for preparing surface-modified graphene waterborne epoxy resin anticorrosive coating
  • Method for preparing surface-modified graphene waterborne epoxy resin anticorrosive coating
  • Method for preparing surface-modified graphene waterborne epoxy resin anticorrosive coating

Examples

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Embodiment 1

[0023] A preparation method for surface-modified graphene water-based epoxy resin anticorrosion coating, comprising the following steps:

[0024] 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 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 60°C for 6 hours to obtain graphite oxide powder;

[0025] 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;

[0026] 3) Preparation of modified graphene powder: soak the multilayer graphite powder obtai...

Embodiment 2

[0032] A preparation method for surface-modified graphene water-based epoxy resin anticorrosion coating, comprising the following steps:

[0033]1) Preparation of graphite oxide powder: immerse 10g of ground graphite powder in 200ml of concentrated nitric acid, soak for 1.5h at 0°C, cool down to -15°C, add 1ml of concentrated phosphoric acid and 40g of potassium ferrate, react at 25°C for 12h 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;

[0034] 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;

[0035] 3) Preparation of modified graphene powder: soak the multilayer graphite powder obtai...

Embodiment 3

[0041] A preparation method for surface-modified graphene water-based epoxy resin anticorrosion coating, comprising the following steps:

[0042] 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 -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 70°C for 4 hours to obtain graphite oxide powder;

[0043] 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;

[0044] 3) Preparation of modified graphene powder: soak the multilayer graphite powder ...

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Abstract

The invention discloses a method for preparing a surface-modified graphene waterborne epoxy resin anticorrosive coating. The method comprises the following steps: preparing graphite oxide powder, preparing multilayer graphite powder, preparing modified graphene powder, preparing a surface-modified graphene metal salt solution, preparing a water-soluble alkyd resin containing modified graphene, preparing a surface-modified graphene waterborne epoxy resin, and preparing the two-component anticorrosive coating. The graphite-stabilized sp<2> hybrid structure in the surface-modified graphene waterborne epoxy resin anticorrosive coating is attached to the surface of a substrate, so the coating can form a physical barrier layer between the substrate and an active medium to prevent diffusion and penetration and prevent the infiltration of corrosive factors such as water molecules, oxygen and chloride ions, so the coating has the advantages of excellent weather resistance, excellent durability,excellent gloss retention, excellent color retention, no efflorescence, non-yellowing, and good decoration property.

Description

technical field [0001] The invention relates to epoxy resin anticorrosion coatings, in particular to a preparation method of surface-modified graphene waterborne epoxy resin anticorrosion coatings. Background technique [0002] Traditional epoxy resin coatings also contain a large amount of organic solvents. Organic solvents are flammable, explosive, toxic and harmful to the environment, making traditional epoxy resin coatings highly polluting and high-risk; water-based epoxy resin coatings are non-toxic, non-flammable, and non-polluting. environment, saving energy and so on. However, water-based epoxy resins are inferior to solvent-based epoxy resin 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 hybrid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62
CPCC09D5/08C09D163/00C09D7/62C08K9/02C08K3/042C08K7/00
Inventor 任朋成
Owner YANTAI HENGNUO CHEM TECH CO LTD