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Preparation method of sulfonic acid type graphene/polyurethane-epoxy resin composite anticorrosive paint

A technology of epoxy resin and anti-corrosion coating, applied in the direction of polyurea/polyurethane coating, anti-corrosion coating, coating, etc., can solve the problems of high equipment requirements, complex process, restricting the development of graphene, etc., to achieve huge application prospects, improve Anti-corrosion performance, the effect of excellent metal anti-corrosion ability

Inactive Publication Date: 2020-08-25
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 sulfonic acid type graphene/polyurethane-epoxy resin composite anticorrosive paint
  • Preparation method of sulfonic acid type graphene/polyurethane-epoxy resin composite anticorrosive paint
  • Preparation method of sulfonic acid type graphene/polyurethane-epoxy resin composite anticorrosive paint

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preparation example Construction

[0027] 1. a preparation method of sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosion coating, is characterized in that, may further comprise the steps:

[0028] Step 1. Put graphene and sodium nitrate in a reaction vessel in an ice-water bath at 0°C, then add concentrated sulfuric acid and stir until evenly mixed, then gradually add potassium permanganate, and transfer the reaction vessel to a constant temperature after the dropwise addition In a water bath, slowly add deionized water dropwise for reaction. After the reaction, add aqueous hydrogen peroxide solution until the reaction solution turns bright yellow, then place it in a centrifuge tube and centrifuge until the pH of the supernatant is neutral, remove the colloid in the lower layer and carry out vacuum Dried to obtain graphene oxide;

[0029] Step 2. Dissolve graphene oxide in deionized water first, then add amino polyether sodium sulfonate to the graphene oxide solution, use sodium hydroxi...

Embodiment 1

[0036] A kind of preparation method of sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosion coating, comprises the following steps:

[0037] 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; ...

Embodiment 2

[0045] A kind of preparation method of sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosion coating, comprises the following steps:

[0046] 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 graphen...

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Abstract

The invention discloses a preparation method of sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosive paint, which comprises the following steps: preparing graphene oxide, sulfonating the graphene oxide to obtain sulfonic acid type graphene, and preparing an acrylic acid modified epoxy resin intermediate from bisphenol A type epoxy resin and acrylic acid; respectively preparing a core phase monomer pre-emulsion and a shell phase monomer pre-emulsion, and carrying out core-shell reaction polymerization on the core phase monomer pre-emulsion and the shell phase monomer pre-emulsion through an initiator to obtain a polyurethane-epoxy resin core-shell emulsion; and finally, mixing the polyurethane-epoxy resin core-shell emulsion with the sulfonic acid type graphene to obtain the anticorrosive paint. According to the invention, the corrosion resistance of the sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosive paint is greatly improved, and the corrosion potential of the coating is increased and the corrosion current density is reduced along with the increase of the content of sulfonic acid type graphene, so that the sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosive paint has 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 a sulfonic acid type graphene / polyurethane-epoxy resin composite anticorrosion coating. 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D5/08C08G18/63C08F283/10C08F220/20C08F220/18C08F220/14
CPCC08F220/14C08F220/20C08F283/105C08G18/635C09D5/08C09D175/04C08F220/1804C08K9/08C08K3/042
Inventor 韦鹏飞刘铮
Owner JINLING INST OF TECH
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