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Coating material based on graphene nanometer container, and self-repairing coating, preparation method and applications thereof

A nano-container and graphene technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problems that the coating cannot provide good shielding effect, the impact of the compactness of the coating film, and limit the wide range of applications, etc., to achieve Improve long-term protective properties, green raw materials, and excellent protective performance

Active Publication Date: 2020-02-25
ZHEJIANG YUXI CORROSION CONTROL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] People's research on self-healing anti-corrosion coatings can be roughly divided into two categories: one is to use polymer capsules to coat healing agents, such as isocyanate, epoxy resin, linseed oil, etc., and use cross-linking and curing reactions to repair coating defects. The size of the microcapsules required for self-healing coatings is large, which will have a certain impact on the compactness of the coating film, limiting its wide application
The other is to use nano-containers to encapsulate corrosion inhibitors, and use the coordination between corrosion inhibitors and metal substrates to adsorb and form a protective film on the exposed metal surface to prevent the oxidation reaction of metals. Usually, the nano-containers used are mesoporous , porous materials, and most of them are spherical or tubular, which cannot provide a good shielding effect for the coating
[0004] At present, there are many studies on improving graphene-modified organic coatings, and there are many methods for preparing self-healing anti-corrosion coatings, but most of them only focus on graphene nanosheets (passive anti-corrosion) or microcapsules (active anti-corrosion) alone. the role of
At the same time, there are few studies on improving the passive and active anti-corrosion properties of coatings

Method used

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  • Coating material based on graphene nanometer container, and self-repairing coating, preparation method and applications thereof
  • Coating material based on graphene nanometer container, and self-repairing coating, preparation method and applications thereof
  • Coating material based on graphene nanometer container, and self-repairing coating, preparation method and applications thereof

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Effect test

Embodiment 1

[0068] Embodiment 1 In this embodiment, a kind of preparation method based on the self-healing coating of graphene nano-container comprises:

[0069] (1) Disperse 1 molar part of graphene oxide (based on carboxyl content) and 1.2 molar parts of aminated cyclodextrin (based on amino content) in a certain amount of deionized water, ultrasonically disperse, and stir the cyclodextrin under magnetic stirring. The dextrin dispersion was slowly added dropwise into the graphene oxide dispersion. Place the above mixture in an oil bath at 85°C for 30 hours, centrifuge for 15 minutes (centrifugal speed is 4000-6000r / min), pour off the supernatant, and wash the lower sediment with deionized water and absolute ethanol. This process is repeated. 3 to 5 times to obtain a precipitate.

[0070] (2) Disperse 1.2 molar parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 1.2 molar parts of aminated cyclodextrin in a certain amount of deionized In water, slowly drop th...

Embodiment 2

[0077] Embodiment 2 In this embodiment, a kind of preparation method based on the self-healing coating of graphene nano container comprises:

[0078] (1) Disperse 1 molar part of graphene oxide (based on carboxyl content) and 1.2 molar parts of aminated cyclodextrin (based on amino content) in a certain amount of deionized water, ultrasonically disperse, and stir the cyclodextrin under magnetic stirring. The dextrin dispersion was slowly added dropwise into the graphene oxide dispersion. Place the above mixture in an oil bath at 85°C for 30 hours, centrifuge (4000-6000r / min) for 15 minutes, pour off the supernatant, and wash the lower sediment with deionized water and absolute ethanol. This process is repeated for 3 ~5 times, a precipitate was obtained.

[0079] (2) Disperse 1.2 molar parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 1.2 molar parts of aminated cyclodextrin in a certain amount of deionized In water, slowly drop the EDC dispersion...

Embodiment 3

[0086] Embodiment 3 In this embodiment, a kind of preparation method based on the self-healing coating of graphene nano container comprises:

[0087] (1) Disperse 1 molar part of graphene oxide (based on carboxyl content) and 1.1 molar parts of aminated cyclodextrin (based on amino content) in a certain amount of deionized water, ultrasonically disperse, and stir the cyclodextrin under magnetic stirring. The dextrin dispersion was slowly added dropwise into the graphene oxide dispersion. Place the above mixture in an oil bath at 85°C for 30 hours, centrifuge (4000-6000r / min) for 15 minutes, pour off the supernatant, and wash the lower sediment with deionized water and absolute ethanol. This process is repeated for 3 ~5 times, a precipitate was obtained.

[0088] (2) Disperse 1.1 molar parts of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDC) and 1.3 molar parts of aminated cyclodextrin in a certain amount of deionized In water, slowly drop the EDC dispersion...

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Abstract

The invention discloses a coating material based on a graphene nanometer container, and a self-repairing coating, a preparation method and applications thereof, wherein the coating material comprisesa first component and a second component, the first component comprises 20-40 parts by weight of an epoxy resin, the second component comprises, by weight, 0.1-2 parts of a graphene nanometer container loading a corrosion inhibitor, 1 part of a diluent, 30-60 parts of an epoxy curing agent, 1 part of an antifoaming agent and 1 part of a leveling agent, the graphene nanometer container loading thecorrosion inhibitor comprises graphene grafted with cyclodextrin and a corrosion inhibitor reversibly combined with the cyclodextrin. According to the invention, the preparation process is simple, theraw materials are environmentally friendly, cheap and easy to obtain, and the self-repairing coating formed by the coating material is excellent in protection performance, has good shielding performance (passive corrosion resistance) and self-repairing performance (active corrosion resistance), and can be widely applied to the fields of metal anticorrosive coating materials for ocean facilities,ship equipment, nuclear power industry and the like.

Description

technical field [0001] The invention relates to an anti-corrosion coating, in particular to a coating based on graphene nano-containers, a self-repairing coating and its preparation method and application, belonging to the technical field of metal anti-corrosion. Background technique [0002] As a two-dimensional nanomaterial, graphene has excellent chemical stability, permeability resistance and mechanical properties. In the field of metal anticorrosion, the preparation of graphene-based composite coatings has aroused widespread interest in corrosion protection workers. However, during the long-term service of the coating, pinholes and micro-cracks will occur on the surface of the coating, which will cause localized corrosion of the metal and greatly reduce the service life of the coating. The anti-corrosion coating with self-healing ability can restore the protective performance of the coating to a certain extent through certain physical and chemical effects after the coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08
CPCC09D5/08C09D163/00C08K13/06C08K9/12C08K5/3475C08K5/47C08K5/3437
Inventor 赵海超刘成宝叶育伟王立平
Owner ZHEJIANG YUXI CORROSION CONTROL CORP
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