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Aqueous anticorrosive coating based on carbon nano composite material and preparation method thereof

A technology for composite materials and anti-corrosion coatings, applied in anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., to achieve uniform dispersion, strong hydrophilicity, compactness and improved integrity

Active Publication Date: 2019-07-12
CHENZHOU TEIKYO CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the adhesion performance and bonding force of the coating are generally improved by using a smaller amount of raw material graphene, or combining multiple resins to cover the substrate, thereby improving its durability. These methods have certain limitations and have not fundamentally solve the above problems

Method used

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  • Aqueous anticorrosive coating based on carbon nano composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Preparation of modified graphene and modified carbon nanotubes:

[0051] Put graphene with a sheet diameter of 5 microns and 10 layers into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 2:1, and ultrasonically disperse at 60°C for about 6 hours; then dilute with water and filter; Put the filtered solid matter into deionized water to obtain a mixture, add 5% sodium dodecylsulfonate of the total mass of the mixture, and ultrasonically disperse for 12 hours; filter, then add deionized water, and continue ultrasonically dispersing for 2 hours to obtain the improved permanent graphene.

[0052] Put carbon nanotubes with a diameter of 2 nanometers and a length of 50 microns into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 2:1, and ultrasonically disperse at 60°C for about 6 hours; then dilute with water and filter; The solid obtained by filtration was placed in deionized w...

Embodiment 2

[0058] Preparation of modified graphene and modified carbon nanotubes:

[0059] Put graphene with a sheet diameter of 1 micron and 20 layers into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 1:1, and ultrasonically disperse at 40°C for about 4.5 hours; then dilute with water and filter ;Put the filtered solid matter into deionized water to obtain a mixture, add 2% sodium dodecylsulfonate of the total mass of the mixture, and ultrasonically disperse for 15 hours; filter, then add deionized water, and continue ultrasonically dispersing for 1.5h. Obtain modified graphene.

[0060] Put carbon nanotubes with a diameter of 100 nanometers and a length of 5 microns into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 3:1, and ultrasonically disperse at 80°C for about 7.5 hours; then dilute with water and filter; Put the filtered solid matter into deionized water to obtain a mixture, a...

Embodiment 3

[0067] Preparation of modified graphene and modified carbon nanotubes:

[0068] Put graphene with a sheet diameter of 50 microns and one layer into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 3:1, and ultrasonically disperse at 80°C for about 7.5 hours; then dilute with water and filter ; put the filtered solid into deionized water to obtain a mixture, add 6% sodium dodecylbenzenesulfonate of the total mass of the mixture, and ultrasonically disperse for 9 h; filter, then add deionized water, and continue ultrasonically dispersing for 2.5 h, that is Modified graphene can be obtained.

[0069] Put carbon nanotubes with a diameter of 1 nanometer and a length of 200 microns into a mixed solution of sulfuric acid and nitric acid, the ratio of sulfuric acid and nitric acid is 1:1, and ultrasonically disperse at 40°C for about 4.5 hours; then dilute with water and filter; Put the filtered solid matter into deionized water to obta...

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Abstract

The invention provides an aqueous anticorrosive coating based on a carbon nano composite material and a preparation method thereof. The aqueous anticorrosive coating based on the carbon nano compositematerial is prepared from the following raw materials: 20 to 60 parts of aqueous resin emulsion, 10 to 30 parts of modified graphene and 5 to 25 parts of modified carbon nanotubes. A preparation method of the modified graphene or modified carbon nanotubes comprises: mixing graphene or carbon nanotubes with a mixed solution of sulfuric acid and nitric acid, dispersing the mixture, diluting the mixture with water, and filtering the mixture to obtain a solid matter; mixing the solid matter with water to obtain a mixture, adding a surfactant, and dispersing and filtering the latter mixture to obtain an insoluble matter; mixing the insoluble matter with water, and dispersing the mixture. The preparation method comprises: mixing the aqueous resin emulsion, the modified graphene and the modifiedcarbon nanotubes, and then grinding the mixture. The aqueous anticorrosive coating based on thecarbon nano composite material, provided by the invention, can form a dense composite structure, and greatly improves the adhesion and mechanical strength of a coating layer, thereby improving the corrosion resistance of the coating.

Description

technical field [0001] The invention relates to the field of anti-corrosion coatings, in particular to a water-based anti-corrosion coating based on carbon nanocomposite materials and a preparation method thereof. Background technique [0002] Graphene composite anti-corrosion coatings can take into account the excellent chemical stability, fast conductivity, outstanding mechanical properties of graphene and the strong adhesion and film-forming properties of polymer resins, which can synergistically improve the overall performance of coatings. However, with the continuous improvement of people's awareness of environmental protection, the development of the original solvent-based anti-corrosion coatings is subject to more and more restrictions. Countries all over the world have also put forward more and more requirements for anti-corrosion coatings. Anti-corrosion coatings are developing in the direction of high performance, multi-function, and environmental protection. Espec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D175/04C09D127/12C09D167/08C09D5/08C09D5/10C09D7/62
CPCC08K2003/0812C08K2003/0893C08K2201/011C09D5/08C09D5/106C09D7/62C09D127/12C09D163/00C09D167/08C09D175/04C08K9/10C08K9/02C08K3/042C08K3/041C08K13/06C08K7/00C08K3/08
Inventor 高宏军欧阳方平孔德明谭姝贝彭文斌熊翔
Owner CHENZHOU TEIKYO CHEM TECH
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