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A kind of epoxy resin-graphene interface chemical bonding anticorrosion coating and preparation method

A technology of epoxy resin and interface chemistry, applied in epoxy resin coatings, anti-corrosion coatings, conductive coatings, etc., can solve problems such as large differences in molecular structure, poor interface compatibility, etc. The effect of improving adhesion and strength

Active Publication Date: 2019-08-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Graphene is a new type of nanomaterial with the thinnest, strongest, and strongest electrical and thermal conductivity found so far. However, the molecular structures of graphene and epoxy resin are very different, and the interface compatibility between them is not good.

Method used

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  • A kind of epoxy resin-graphene interface chemical bonding anticorrosion coating and preparation method
  • A kind of epoxy resin-graphene interface chemical bonding anticorrosion coating and preparation method
  • A kind of epoxy resin-graphene interface chemical bonding anticorrosion coating and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First disperse 100 grams of multi-layer graphene in 2000 grams of deionized water to prepare a graphene dispersion under stirring conditions, and at the same time disperse 200 grams of hydrogen peroxide and 200 grams of sodium hydroxide in 1000 grams of deionized water to prepare peroxide Dispersion liquid, then under the condition of stirring, peroxide dispersion liquid is added drop-wise in the graphene dispersion liquid after stirring evenly, with ultrasonic treatment 120 minutes, the product centrifugation of ultrasonic treatment removes deionized water, then adds 180 grams of epoxy equivalent 160~180(g.mol -1 ) of bisphenol F type epoxy resin at 140° C. for 0.5 hours to stop the reaction, and the reaction product was repeatedly washed with acetone, and centrifuged or filtered to remove free compounds to obtain graphene fillers grafted with epoxy resin.

[0039] The preparation method of component A of the paint is as follows: 95 grams of graphene filler grafted wit...

Embodiment 2

[0041] First disperse 100 grams of double-layer graphene in 1000 grams of deionized water under stirring to prepare a graphene dispersion, and disperse 10 grams of sodium peroxide and 5 grams of potassium hydroxide in 100 grams of deionized water to prepare peroxide Dispersion, then under the condition of stirring, the peroxide dispersion is added dropwise to the graphene dispersion and stirred evenly, and treated with ultrasonic wave for 10 minutes, after the product of ultrasonic treatment is centrifuged to remove deionized water, add 1 gram of epoxy equivalent 160 ~180(g.mol -1 ) of bisphenol F epoxy resin at 120° C. for 8 hours to stop the reaction, and the reaction product was repeatedly washed with acetone, and centrifuged or filtered to remove free compounds to obtain graphene fillers grafted with epoxy resin.

[0042] The preparation method of component A of the paint is as follows: 0.05 grams of graphene filler grafted with epoxy resin, 100 grams of epoxy equivalent 1...

Embodiment 3

[0044] First disperse 100 grams of multilayer graphene in 2000 grams of toluene under stirring to prepare a graphene dispersion, and simultaneously disperse 10 grams of dibenzoyl peroxide and 6 grams of sulfuric acid in 100 grams of toluene to prepare a peroxide dispersion , then add the peroxide dispersion liquid dropwise to the graphene dispersion liquid under the condition of stirring, stir evenly, treat with ultrasonic wave for 60 minutes, add 90 grams of epoxy equivalent 200~220 (g.mol -1 ) of aliphatic epoxy resin at 110°C for 24 hours to stop the reaction, and the reaction product was repeatedly washed with acetone, and centrifuged or filtered to remove free compounds to obtain graphene fillers grafted with epoxy resin.

[0045] The preparation method of component A of the paint is: in a clean container, 1 gram of graphene filler grafted with epoxy resin, 100 grams of epoxy equivalent 455-556 (g.mol -1 ) of bisphenol F epoxy resin, 50 grams of toluene, 10 grams of isopr...

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Abstract

The invention belongs to the technical field of coatings and in particular relates to an epoxy resin-graphene interface chemical bonding anticorrosive coating and a preparation method thereof. In the anticorrosive coating, graphene grafted with epoxy resin is added to serve as filler, and the filler is prepared through a peroxide treatment technology. The epoxy resin grafted to the surface of the graphene has high compatibility with epoxy resin in the coating, can be uniformly dispersed in the epoxy resin in the coating, and carries out a cross-linking reaction with a curing agent so as to obtain the epoxy resin-graphene interface chemical bonding anticorrosive coating. The coating disclosed by the invention is wide and readily available in raw materials, can be produced on general coating manufacturing equipment and can be coated by multiple methods such as brushing, spraying and dipping, and the coating layer obtained after coating curing has the characteristics of corrosion resistance, high strength, high conductivity and the like. The anticorrosive coating obtained after coating curing can be independently used and can also be matched with corresponding intermediate coat or finishing coat.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an epoxy resin-graphene interface chemically bonded anticorrosion coating and a preparation method thereof. Background technique [0002] Organic coatings, as the most effective, economical, and widely used anti-corrosion method for metal materials, are the basis for anti-corrosion of metal substrates, and more than half of them are epoxy resin-based anti-corrosion coatings. A large number of anti-corrosion projects and scientific experiments at home and abroad have proved that flake-type fillers (mica, glass flakes, etc.) can improve the barrier performance of epoxy coatings to corrosive media. Based on the labyrinth effect formed by the scale filler in the coating, the transmission path of the corrosive medium in the coating is extended to achieve the purpose of blocking the transmission of the corrosive medium in the coating. However, the size of traditional flak...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/62C09D5/08C09D5/24
CPCC08K3/04C08K9/04C08K2201/011C09D5/08C09D5/24C09D7/62C09D163/00C08L77/00
Inventor 吴航王福会朱圣龙
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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