Water-borne graphene composite coating, and water-borne graphene composite paint and preparation method thereof

A water-based graphene and composite coating technology, applied in coatings, anti-corrosion coatings, epoxy resin coatings, etc., can solve the problem that water-based coatings are difficult to form a uniform, structurally dense film structure, and it is difficult to achieve high infiltration of fillers and pigment particles. It is difficult to form high-quality anti-corrosion coatings and other problems, so as to achieve excellent anti-corrosion effect, good dispersibility and chemical stability, and low cost.

Active Publication Date: 2016-07-27
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult for water-based coatings to form a uniform and dense film structure, which restricts the performance of water-based coatings.
At the same time, in the process of film formation, due to the residual hydrophilic group, the hydrophilicity of the coating is improved, the ability to shield water vapor diffusion is reduced, and the coating's ability to resist moisture adhesion is reduced.
In addition, it is difficult for water-based resins to achieve a high degree of infiltration and dispersion of fillers and pigment particles, making it difficult to form high-quality anti-corrosion coatings

Method used

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  • Water-borne graphene composite coating, and water-borne graphene composite paint and preparation method thereof
  • Water-borne graphene composite coating, and water-borne graphene composite paint and preparation method thereof
  • Water-borne graphene composite coating, and water-borne graphene composite paint and preparation method thereof

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preparation example Construction

[0031] The embodiment of the present invention provides a method for preparing a water-based graphene composite coating. The method comprises the steps of:

[0032] Step (1): equimolar amounts of aniline oligomer derivatives and alkali are dissolved in water to obtain a mixture A. The purpose of adding alkali is to make the aniline oligomer derivatives more soluble in water. Adding an equimolar amount is to make the carboxylic acid contained in the structure of the aniline oligomer derivative, or other acid groups, completely neutralize with the alkali. The alkali is one of sodium hydroxide, triethylamine, potassium hydroxide and ammonia water.

[0033] The aniline oligomer derivative and alkali are dispersed in water to fully dissolve the aniline oligomer derivative. The aniline oligomer derivatives are used to modify the graphene. The aniline oligomer derivatives are aniline oligomers with functional groups, and the functional groups include carboxyl groups, alkyl groups...

Embodiment 1

[0050] Weigh 1.24 g of aniline trimer and dissolve it in 50 ml of THF, then add 1.04 g of succinic anhydride, react for 3 hours, and precipitate with petroleum ether to obtain aniline trimer carboxyl derivative.

[0051] Weigh 2.0 g of aniline trimer carboxyl derivatives and 0.33 g of NaOH solid and dissolve them in 10 mL of water to obtain mixture A. 2 g of graphene (purchased from Ningbo Moxi Technology Co., Ltd.) was added to the mixture A, and ultrasonically dispersed for 1 hour to obtain a graphene dispersion. The content of graphene in water reached 0.2g / mL after modified by aniline trimer carboxyl derivative. The comparative effect of described graphene dispersion liquid and untreated graphene after water dispersion sees figure 1 . The electron transmission electron micrograph of described graphene dispersion liquid sees figure 2 . Depend on figure 1 and figure 2 It can be seen that graphene can be uniformly dispersed in water after being modified by aniline tri...

Embodiment 2

[0060] Weigh 1.5 g of the aniline trimer carboxyl derivative and 0.33 g of NaOH solid dissolved in 10 mL of water to obtain mixture A. Add 1.5 g of graphene to the mixture A, and ultrasonically disperse for 1 hour to obtain a graphene dispersion. The content of graphene in water reached 0.15g / mL after modified by aniline trimer carboxyl derivative.

[0061] The graphene dispersion was added to 92g of water-based polyurethane resin (purchased from Northwest Yongxin Group Co., Ltd.), and mixed uniformly to obtain mixture B. Add 1.67g of leveling agent, 1g of defoamer, and 2g of anti-sedimentation agent in sequence to the mixture B, and stir evenly to obtain a water-based graphene composite coating.

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Abstract

The invention provides a water-borne graphene composite paint. The water-borne graphene composite paint is composed of water-based resin, graphene, an aniline oligomer derivative, water and a paint additive, wherein the graphene accounts for 0.01 to 4% of the mass of the water-borne graphene composite paint and is uniformly dispersed in the water-based resin by forming phi-phi bonds with the aniline oligomer derivative. The invention also provides a preparation method for the water-borne graphene composite paint and a water-borne graphene composite coating.

Description

technical field [0001] The invention relates to an anti-corrosion coating and an anti-corrosion coating, in particular to a graphene-based water-based graphene composite coating, a water-based graphene composite coating and a preparation method thereof. Background technique [0002] Anti-corrosion coatings refer to paints and coatings that can prevent corrosion of metals. In recent years, the country has been increasing investment in seven-tenths of the earth's oceans. Anti-corrosion coatings have become an important new force in the field of coatings. Anti-corrosion coatings are playing an increasingly important role and have promising development prospects. [0003] Water-based paint refers to water as the solvent of the paint. When in use, the paint is dispersed in water as molecular aggregates, relying on the molecular aggregates to move closer to each other, the interface molecules penetrate, the molecular aggregates fuse, and finally form a coating after the water vol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D133/00C09D175/04C09D175/14C09D161/20C09D5/08C09D7/12
Inventor 余海斌刘栓赵海超顾林戴雷
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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