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Graphene-modified anticorrosive paint and preparation process thereof

A technology of graphene modification and anti-corrosion coating, which is applied in the field of coatings. It can solve the problems that graphene cannot be completely distributed on the surface of the special layer and the coating has corrosion spots, so as to improve the anti-corrosion ability and prevent the contact between steel and air.

Active Publication Date: 2019-01-25
湖南邦泽科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of anticorrosion paint based on graphene modification and preparation technology thereof, this paint is base with epoxy resin and graphene-based acrylic resin, two kinds of resins are connected into a large network structure, and the gas phase retardation The corrosion agent is wrapped in the network structure. When the paint is coated on the steel surface, a coating is formed. The gas phase corrosion inhibitor sublimates in the network skeleton, and the gas generated by sublimation fills the epoxy resin and graphene base in the coating. In the network voids of the acrylic resin, the coating is completely sealed without gaps. At the same time, due to the layer-by-layer connection of the graphene-based acrylic resin, the resins in the entire coating are interlaced, and there are no gaps in the coating, thus making The air cannot enter the coating, which can effectively prevent the steel from being in contact with the air, thereby improving the anti-corrosion ability of the steel, and solving the problem of directly adding graphene to the coating in the prior art, and the graphene cannot be completely distributed in the special layer after mixing Surface, completely cover the coating, so that the coating still has the problem of corrosion points

Method used

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  • Graphene-modified anticorrosive paint and preparation process thereof
  • Graphene-modified anticorrosive paint and preparation process thereof
  • Graphene-modified anticorrosive paint and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The preparation process of graphene-based acrylic resin is as follows:

[0030] ① Add 100g graphite powder to 2.3L concentrated sulfuric acid solution, add 50g sodium nitrate to it at the same time, then react in ice water bath for 10-15min, then add 300g potassium permanganate to it, stir for 5-10min and then heat up to 50 React at ℃ for 5-6h, cool to room temperature, then slowly add hydrogen peroxide dropwise until the color of the solution turns dark yellow, then centrifuge and dry to obtain graphene oxide;

[0031] ② Add 100g of graphene oxide into ethanol, ultrasonically disperse for 5-8min, then add 1.2kg of acrylamide, stir and react at 30-40°C for 10-12h, then filter and wash to obtain modified graphene;

[0032] ③Dissolve 80g of modified graphene in 400mL ethanol solution, and add 40g of aluminum tripolyphosphate to it, disperse evenly by ultrasonic waves, then pour it into a reaction vessel, and add 97g of azobisisobutyronitrile to it, and Nitrogen was passe...

Embodiment 2

[0034] The preparation process of graphene-based acrylic resin is as follows:

[0035] ① Add 100g graphite powder to 2.5L concentrated sulfuric acid solution, add 50g sodium nitrate to it at the same time, then react in ice water bath for 10-15min, then add 300g potassium permanganate to it, stir for 5-10min and then heat up to 50 React at ℃ for 5-6h, cool to room temperature, then slowly add hydrogen peroxide dropwise until the color of the solution turns dark yellow, then centrifuge and dry to obtain graphene oxide;

[0036] ②Add 100g of graphene oxide into ethanol, ultrasonically disperse for 5-8min, then add 1.3kg of acrylamide, stir and react at 30-40°C for 10-12h, then filter and wash to obtain modified graphene;

[0037] ③Dissolve 80g of modified graphene in 400mL ethanol solution, and add 40g of aluminum tripolyphosphate to it, disperse evenly by ultrasonic waves, then pour it into a reaction vessel, and add 97g of azobisisobutyronitrile to it, and Nitrogen was passed...

Embodiment 3

[0039] A kind of preparation technology based on the anticorrosion coating of graphene modification, specifically as follows:

[0040] In the first step, add 12 g of ethyl orthosilicate to 50 g of ethanol, stir at room temperature for 20-30 minutes, then add 13 g of lauric acid diethanolamide, stir for 30-50 minutes, add water, and stir for 3 hours to obtain a colloidal solution;

[0041] In the second step, add 340g of graphene-based acrylic resin to 400g of ethanol, stir and disperse evenly, add 120g of epoxy resin and the colloid solution prepared in the first step to it, mix evenly, add 30g of gas phase corrosion inhibitor and 22g Defoamer, vigorously stir and mix for 10-15min to obtain component A;

[0042] In the third step, 50 g of polyamide is added to component A, stirred and cured for 10-20 minutes to obtain an anti-corrosion coating.

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Abstract

The invention discloses graphene-modified anticorrosive paint, which comprises the following components in parts by weight: 34 to 36 parts of graphene-based acrylic resin, 12 to 14 parts of epoxy resin, 1.2 to 1.4 parts of tetraethyl orthosilicate, 1.3 to 1.4 parts of lauroyl diethanolamide, 3 to 4 parts of a volatile corrosion inhibitor, 2.2 to 2.5 parts of a defoaming agent, 45 to 56 parts of ethanol, 5 to 7 parts of polyamide and 3 to 4 parts of water, wherein the epoxy resin is bisphenol-A epoxy resin. According to the graphene-modified anticorrosive paint, with the epoxy resin and the graphene-based acrylic resin as matrix, the two types of resins are connected to form a large reticular structure, and the volatile corrosion inhibitor is wrapped in the reticular structure; when the paint is applied on the surface of steel, a coating layer is formed, the volatile corrosion inhibitor is sublimed in the reticular framework, the meshes of the epoxy resin and the graphene-based acrylicresin in the coating layer are filled up with the sublimed gas, so that the coating layer is fully sealed without gaps, consequently, the steel can be effectively prevented from being in contact withthe air, and thereby the corrosion resistance of the steel can be increased.

Description

technical field [0001] The invention belongs to the field of coatings, and relates to a graphene-based anticorrosion coating and a preparation process thereof. Background technique [0002] In the fields of ships, bridges, marine facilities and large-scale construction equipment, steel is mostly used as the base material. Since steel is easily oxidized and corroded in the air, the strength and hardness of the steel will change. Therefore, the existing large-scale equipment , usually use anti-corrosion paint to coat the steel to achieve the anti-corrosion performance of the steel. [0003] Most of the existing anti-corrosion coatings cathodically protect steel by adding zinc powder, but when the content of zinc powder is high, the paint film will have poor compactness and low strength. Therefore, in order to improve the performance of anti-corrosion coatings, in the prior art, directly add Graphene oxide, because graphene can be well dispersed in the coating, and at the same...

Claims

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Application Information

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IPC IPC(8): C09D187/00C09D163/00C09D5/08C08F292/00
CPCC08F292/00C08K2003/327C09D5/08C09D187/005C08L63/00C08K3/32C08K3/36
Inventor 不公告发明人
Owner 湖南邦泽科技有限公司
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