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Graphene-containing water-borne epoxy resin emulsion and preparation method thereof

A water-based epoxy resin, epoxy resin technology, applied in epoxy resin coatings, coatings, anti-corrosion coatings, etc., can solve problems such as poor compatibility and difficult dispersion of graphene

Active Publication Date: 2018-01-09
XIAMEN KNANO GRAPHENE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to adopt the in-situ polymerization method to prepare polyethylene glycol / graphene composite material, graphene can be uniformly dispersed and anchored in the polyethylene glycol matrix, when preparing emulsifier, the polyethylene glycol surface The hydroxyl group reacts with the epoxy resin under the action of a catalyst to realize the connection between polyethylene glycol, graphene and epoxy resin. During the preparation of the emulsion, the graphene enters the emulsion with the emulsifier, solving the problem of graphene Difficult to disperse and poor compatibility in the emulsion, to obtain a water-based epoxy resin emulsion containing graphene uniformly dispersed

Method used

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  • Graphene-containing water-borne epoxy resin emulsion and preparation method thereof
  • Graphene-containing water-borne epoxy resin emulsion and preparation method thereof
  • Graphene-containing water-borne epoxy resin emulsion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] (1) Preparation of polyethylene glycol / graphene composites

[0025] Put 0.1mol ethylene glycol, 0.2g graphene powder, and 0.02mol sodium hydroxide into the high-pressure reactor, mix and stir evenly, pass high-purity nitrogen to replace 3~5 times, and then vacuumize to -0.1MPa, Raise the temperature to 110°C, slowly feed 9mol of ethylene oxide into the reactor, keep the temperature in the reactor at 130°C, control the reaction pressure to 0.35MPa, and completely pass through the ethylene oxide. Keeping the reaction temperature for decompression aging, degassing treatment after aging, neutralization with citric acid after degassing, adsorption, dehydration, filtration, and drying to obtain a polyethylene glycol / graphene composite material with a molecular weight of about 4000;

[0026] (2) Preparation of water-based epoxy resin emulsifier

[0027] Mix 400g polyethylene glycol / graphene composite material and 400g epoxy resin E-44 uniformly at 70°C, add 2g potassium persu...

Embodiment 2

[0032] (1) Preparation of polyethylene glycol / graphene composites

[0033]Put 0.1mol ethylene glycol, 0.2g graphene oxide powder, and 0.02mol sodium hydroxide into the high-pressure reactor, mix and stir evenly, pass high-purity nitrogen gas for replacement 3~5 times, and then vacuumize to -0.1MPa , heat up to 110°C, slowly feed 9mol ethylene oxide into the reactor, keep the temperature in the reactor at 130°C, control the reaction pressure to 0.35MPa, and pass through all the ethylene oxide. Keeping the reaction temperature for decompression aging, degassing treatment after aging, neutralization with citric acid after degassing, adsorption, dehydration, filtration, and drying to obtain a polyethylene glycol / graphene oxide composite material with a molecular weight of about 4000;

[0034] (2) Preparation of water-based epoxy resin emulsifier

[0035] Mix 400g of polyethylene glycol / graphene oxide composite material and 400g of epoxy resin E-44 uniformly at 70°C, add 2g of pot...

Embodiment 3

[0040] (1) Preparation of polyethylene glycol / graphene composites

[0041] Put 0.1mol ethylene glycol, 0.2g functionalized graphene powder, and 0.02mol sodium hydroxide into the high-pressure reactor, mix and stir evenly, pass high-purity nitrogen gas for replacement 3~5 times, and then vacuumize to -0.1 MPa, raise the temperature to 110°C, slowly feed 9mol ethylene oxide into the reactor, keep the temperature in the reactor at 130°C, control the reaction pressure to 0.35MPa, and completely pass through the ethylene oxide. Keeping the reaction temperature for decompression aging, degassing treatment after aging, neutralization with citric acid after degassing, adsorption, dehydration, filtration, and drying to obtain a polyethylene glycol / functionalized graphene composite material with a molecular weight of about 4000;

[0042] (2) Preparation of water-based epoxy resin emulsifier

[0043] Mix 400g of polyethylene glycol / functionalized graphene composite material and 400g of ...

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Abstract

The invention discloses graphene-containing water-borne epoxy resin emulsion and a preparation method thereof. The preparation method comprises the specific preparation steps: preparing a polyethyleneglycol / graphene composite material, preparing a water-borne epoxy resin emulsifying agent and preparing water-borne epoxy resin emulsion, wherein the polyethylene glycol / graphene composite material is prepared by an in-situ polymerization method, so that graphene can be uniformly dispersed and anchored in a polyethylene glycol matrix; when the emulsifying agent is prepared, hydroxyl radicals on the surface of polyethylene glycol react with epoxy resin under the action of a catalyst, so that the connection among polyethylene glycol, the graphene and the epoxy resin is realized; in the preparation process of the emulsion, the graphene enters the emulsion along with the emulsifying agent, so that the problems of difficult dispersion and poor compatibility and the like of the graphene in theemulsion are solved and the graphene-containing water-borne epoxy resin emulsion with uniform dispersion is obtained. The graphene-containing water-borne epoxy resin emulsion prepared by the inventionhas good centrifugation, dilution and storage stability, is lower in cost compared with that of the traditional epoxy resin, and is safe, environmentally friendly and free from toxicity; and when thegraphene-containing water-borne epoxy resin emulsion is applied in anti-corrosive coatings, the anti-corrosive property and the adhesive force are stronger, the impact resistance is good and the construction is easy.

Description

technical field [0001] The invention belongs to the technical field of epoxy resin water-based coatings, in particular to a graphene-containing water-based epoxy resin emulsion and a preparation method thereof. Background technique [0002] Epoxy resin has good physical and chemical properties. It has excellent bonding strength to the surface of metal and non-metal materials, good dielectric properties, small shrinkage after curing, high hardness, and is stable to alkali and most solvents. One of the most widely consumed synthetic resin varieties in the paint industry. With the increasing social awareness of environmental protection, the coatings industry is developing from traditional solvent-based coatings to water-based coatings, high-solid coatings, powder coatings and light-curing coatings. Commonly used epoxy resins are insoluble in water and only soluble in water. It is limited to organic solvents, which greatly limits the application of epoxy resins, and also enable...

Claims

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Application Information

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IPC IPC(8): C08J3/03C08L63/00C08L71/02C08K3/04C08G65/28C09D163/00C09D5/08
Inventor 林丽萍赵立平
Owner XIAMEN KNANO GRAPHENE TECH CORP
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