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Preparation method of graphene oxide/acrylate-epoxy resin composite anticorrosive paint

An epoxy resin and acrylate technology, applied in anti-corrosion coatings, coatings, etc., can solve problems such as high equipment requirements, complex processes, and limited graphene development, and achieve great application prospects, improve anti-corrosion performance, and excellent metal anti-corrosion. effect of ability

Inactive Publication Date: 2020-08-11
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, graphene is mainly deposited and transferred by CVD, EPD and other methods. Due to the high requirements for equipment and the complicated process of chemical deposition and film transfer methods, the development of graphene in water-based anti-corrosion coatings is also limited.

Method used

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  • Preparation method of graphene oxide/acrylate-epoxy resin composite anticorrosive paint

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Effect test

Embodiment 1

[0026] A preparation method for graphene oxide / acrylate-epoxy resin composite anticorrosion coating, comprising the following steps:

[0027] Step 1: Take 40g of graphene and 20g of sodium nitrate in a 500mL three-neck flask in an ice-water bath at 0°C, then add 80mL of concentrated sulfuric acid and stir for 30min until evenly mixed, then gradually add 120g of potassium permanganate, dropwise for 90min , after the dropwise addition, the reaction vessel was transferred to a constant temperature water bath at 40°C, and 90mL of deionized water was slowly added dropwise to react for 1 hour. After the reaction was completed, 6mL of 30% hydrogen peroxide aqueous solution was added until the reaction solution became Bright yellow, then placed in a centrifuge tube, centrifuged at a speed of 5000r / min until the pH of the supernatant is neutral, the colloid in the lower layer is taken out, and dried in a vacuum oven at 35°C for 72 hours to obtain graphene oxide;

[0028] Step 2: Take b...

Embodiment 2

[0034] A preparation method for graphene oxide / acrylate-epoxy resin composite anticorrosion coating, comprising the following steps:

[0035] Step 1: Take 60g of graphene and 30g of sodium nitrate in a 500mL three-neck flask in an ice-water bath at 0°C, then add 80mL of concentrated sulfuric acid and stir for 30min until the mixture is uniform, then gradually add 180g of potassium permanganate, dropwise for 90min , after the dropwise addition, the reaction vessel was transferred to a constant temperature water bath at 40°C, and 90mL of deionized water was slowly added dropwise to react for 1 hour. After the reaction was completed, 6mL of 30% hydrogen peroxide aqueous solution was added until the reaction solution became Bright yellow, then placed in a centrifuge tube, centrifuged at a speed of 5000r / min until the pH of the supernatant is neutral, the colloid in the lower layer is taken out, and dried in a vacuum oven at 35°C for 72 hours to obtain graphene oxide;

[0036] Step...

Embodiment 3

[0042] A preparation method for graphene oxide / acrylate-epoxy resin composite anticorrosion coating, comprising the following steps:

[0043] Step 1: Take 20g of graphene and 10g of sodium nitrate in a 500mL three-neck flask in an ice-water bath at 0°C, then add 80mL of concentrated sulfuric acid and stir for 30min until the mixture is uniform, then gradually add 60g of potassium permanganate, dropwise for 90min , after the dropwise addition, the reaction vessel was transferred to a constant temperature water bath at 40°C, and 90mL of deionized water was slowly added dropwise to react for 1 hour. After the reaction was completed, 6mL of 30% hydrogen peroxide aqueous solution was added until the reaction solution became Bright yellow, then placed in a centrifuge tube, centrifuged at a speed of 5000r / min until the pH of the supernatant is neutral, the colloid in the lower layer is taken out, and dried in a vacuum oven at 35°C for 72 hours to obtain graphene oxide;

[0044] Step ...

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Abstract

The invention discloses a preparation method of graphene oxide / acrylate-epoxy resin composite anticorrosive paint. The preparation method comprises the following steps: preparing graphene oxide, and preparing an acrylic acid modified epoxy resin intermediate from bisphenol A epoxy resin and acrylic acid; then, respectively preparing a nuclear phase monomer pre-emulsion and a shell phase monomer pre-emulsion, and carrying out core-shell reaction polymerization on the nuclear phase monomer pre-emulsion and the shell phase monomer pre-emulsion through an initiator to obtain an acrylate-epoxy resin core-shell emulsion; and finally, mixing the acrylate-epoxy resin core-shell emulsion with graphene oxide to obtain the anticorrosive paint. According to the invention, an epoxy group on the surfaceof the graphene oxide is used as a reaction active point, so the corrosion resistance of the graphene oxide / acrylate-epoxy resin composite anticorrosive paint is greatly improved. Along with the increase of the content of the graphene oxide, the corrosion potential of the paint is increased, and corrosion current density is reduced, so the paint presents excellent metal corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of organic anticorrosion coatings, in particular to a preparation method of graphene oxide / acrylate-epoxy resin composite anticorrosion coatings. Background technique [0002] The anti-corrosion coating is generally a liquid mixture that is sprayed, dipped, brushed, etc. on the surface of the material. After curing, a film layer that is corrosion-resistant and can block corrosive media is formed. The coating coating has low curing temperature, simple operation and construction, low cost, and good anti-corrosion effect. It is an ideal method for metal surface anti-corrosion. At present, there are many kinds of anti-corrosion coatings on the surface of metal materials, which are divided into two types: organic protective coatings and inorganic protective coatings. Inorganic anti-corrosion coatings are mainly made of silicate or phosphate compounds as binders, and various pigments, additives, curing agents, et...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/08C09D5/08C08F285/00C08F220/18C08F230/08C08F220/28C08F283/10C08F220/20C08F220/14C08G59/17
CPCC08F283/105C08F285/00C08G59/1466C09D5/08C09D151/08C08F220/20C08F220/14C08F220/1804C08F230/08C08F220/286C08K3/042
Inventor 韦鹏飞刘铮
Owner JINLING INST OF TECH
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