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Aqueous anticorrosive modified graphene coating material, and preparation method and application thereof

A corrosion-resistant coating, graphene water-based technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problems of graphene difficult to stably disperse, easy to stack, poor compatibility, etc., to achieve good storage stability and compatibility, Good water resistance, low cost effect

Active Publication Date: 2016-08-10
CHANGZHOU HUAKE POLYMERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to fix graphene directly on the surface of metal substrates, and it is difficult to disperse graphene stably in water or organic solvents. In addition, graphene has poor compatibility with other materials and is prone to stacking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030](1) Under ice-bath conditions, add 1.0g of graphite to the mixture of concentrated sulfuric acid and concentrated phosphoric acid (6g of concentrated phosphoric acid, 54g of concentrated sulfuric acid), and stir vigorously for 30min; further slowly add 6g of potassium permanganate to the mixture solution, stirred vigorously for 30 min, moved to a 50°C water bath, and stirred for 12 h; cooled to room temperature, added 100 mL of ice water and 1 mL of 30% hydrogen peroxide, stirred until the solution turned bright yellow, filtered, and the filtrate was centrifuged at 4000 rpm After 4 hours, pour the supernatant, and wash the obtained solid with 200mL deionized water, 30% hydrochloric acid solution and ethanol in sequence until the filtrate has no sulfate ions and the solution is neutral; dry under vacuum at room temperature to obtain graphite oxide;

[0031] (2) Take 0.5g of the above-mentioned graphite oxide, add 50mL of thionyl chloride, protect with nitrogen, stir at 65°...

Embodiment 2

[0035] (1) Under the condition of ice bath, add 5.0g of graphite into the mixture of concentrated sulfuric acid and concentrated phosphoric acid (13g of concentrated phosphoric acid, 117g of concentrated sulfuric acid), stir vigorously for 60min; further slowly add 30g of potassium permanganate into the mixture solution, stirred vigorously for 30min, moved to a 50°C water bath, and stirred for 12h; cooled to room temperature, added 500mL ice water and 6mL hydrogen peroxide with a mass fraction of 30%, stirred until the solution turned bright yellow, filtered, and the filtrate was centrifuged at 4000rpm After 4 hours, pour the supernatant, and wash the obtained solid with 200mL deionized water, 30% hydrochloric acid solution and ethanol in sequence until the filtrate has no sulfate ions and the solution is neutral; dry under vacuum at room temperature to obtain graphite oxide;

[0036] (2) Take 2g of the above-mentioned graphite oxide, add 200mL of thionyl chloride, protect it w...

Embodiment 3

[0040] (1) Under ice bath conditions, add 3.0g of graphite to the mixture of concentrated sulfuric acid and concentrated phosphoric acid (13g of concentrated phosphoric acid, 117g of concentrated sulfuric acid), and stir vigorously for 90min; further slowly add 30g of potassium permanganate to the above mixture solution, stirred vigorously for 60min, moved to a 50°C water bath, and stirred for 12h; cooled to room temperature, added 500mL ice water and 6mL hydrogen peroxide with a mass fraction of 30%, stirred until the solution turned bright yellow, filtered, and the filtrate was centrifuged at 4000rpm After 5 hours, the supernatant was poured, and the obtained solid was washed successively with 200 mL of deionized water, 30% hydrochloric acid solution and ethanol until the filtrate had no sulfate ions and the solution was neutral; dried under vacuum at room temperature to obtain graphite oxide;

[0041] (2) Take 2g of the above-mentioned graphite oxide, add 200mL of thionyl ch...

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PUM

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Abstract

The invention relates to an aqueous anticorrosive modified graphene coating material, and a preparation method and an application thereof. The preparation method comprises the following steps: oxidizing natural graphite in an oxidant, modifying the surface of the obtained graphite oxide with an atom transfer radical polymerization (ATRP) initiator with different structures, adding a monomer, a high-valence catalyst, a ligand and a reducing agent to make the monomer undergo atom transfer radical polymerization (AGET ATRP) on the surface of graphene for electron transfer to generate an activator, and reducing graphene oxide (GO) by the reducing agent to obtain a water-dispersible polymer modified graphene material. The polymer modified graphene material can be used to prepare aqueous coatings, can be used to protect the surfaces of metal materials, can effectively isolate a corrosion medium from a substrate, and has excellent water, corrosion and weather resistance, and the preparation method has the advantages of simplicity, high efficiency, easy industrial production and wide application values.

Description

technical field [0001] The invention belongs to the field of metal anti-corrosion materials, and in particular relates to a modified graphene water-based anti-corrosion coating material and a preparation method and application thereof. Background technique [0002] Metal corrosion has brought huge economic losses and social harm to human beings. With the development of industry and technology, the importance of metal corrosion has become increasingly prominent. Among them, coating technology is the most convenient and economical, so it plays an increasingly important role in the construction of the national economy. more important role. Traditional anti-corrosion coatings often use solvent-based coatings, which contain a large amount of volatile organic compounds, and a considerable part of the coatings contain toxic substances such as tin, lead or chromium, which bring serious pollution to the environment and endanger human health. Therefore, the development of water-based...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D151/10C09D151/08C09D5/08C08F292/00
CPCC09D151/10C08F292/00C09D5/08C08F2438/01C08L2205/025C08L2205/035C08L51/08C08L61/20C08F220/286C08F220/34C08F220/1804C08F220/281C08F220/325
Inventor 蒋红娟钱永嘉
Owner CHANGZHOU HUAKE POLYMERS
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