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Single-layer graphene macromolecular composite epoxy resin adhesive and preparation method thereof

A technology of epoxy resin glue and single-layer graphene, which is applied in the direction of epoxy resin glue, non-polymer adhesive additives, adhesives, etc., can solve unfavorable practical applications, complicated composite process, and inability to fully utilize single-layer graphite Excellent properties of olefin and other issues, to achieve the effect of enhancing the bonding performance

Active Publication Date: 2019-01-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This non-molecular level recombination cannot give full play to the excellent properties of single-layer graphene
In order to obtain single-layer graphene composite epoxy resin materials, additional chemical modifications or stabilizers are often required. These methods complicate the graphene-epoxy resin composite process, which is not conducive to its practical application.

Method used

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  • Single-layer graphene macromolecular composite epoxy resin adhesive and preparation method thereof
  • Single-layer graphene macromolecular composite epoxy resin adhesive and preparation method thereof
  • Single-layer graphene macromolecular composite epoxy resin adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Step (1) First, apply the Hummers method to oxidize the graphite to obtain graphite oxide, and then purify it with hydrochloric acid and ethanol. Dry the purified graphite oxide naturally, add ethylene glycol solvent, stir or sonicate to obtain a single-layer graphene oxide-ethylene glycol dispersion.

[0050] Take 20mL graphene oxide-ethylene glycol dispersion (1mg / mL), add 40 microliters of reducing agent hydrazine hydrate (98%), place in an oil bath at 95°C for 1h, and obtain a single-layer graphene dispersion (approx. 0.5mg / mL).

[0051] Vacuum filter the single-layer graphene dispersion until the solvent is just exhausted to obtain a graphene film solvated with ethylene glycol; place 10 mg of the film in 2 mL of dimethyl sulfoxide solvent and soak for 1 h to replace the ethylene glycol. A graphene film solvated with dimethyl sulfoxide was obtained.

[0052] Step (2) get a certain amount of DMSO solvated graphene film (as graphene quality is 5mg) and join in 5g ep...

Embodiment 2

[0060] Step (1) First, apply the Hummers method to oxidize the graphite to obtain graphite oxide, and then purify it with hydrochloric acid and ethanol. Dry the purified graphite oxide naturally, add dimethyl sulfoxide solvent, stir or sonicate to obtain a monolayer graphene oxide-dimethyl sulfoxide dispersion.

[0061] Take 20 mL of graphene oxide-dimethyl sulfoxide dispersion (1 mg / mL), place it in a reaction kettle for reduction at 165° C. for 13 h, and obtain a single-layer graphene dispersion (about 0.5 mg / mL).

[0062] The graphene dispersion was vacuum filtered until the solvent was just exhausted to obtain a graphene film solvated with dimethyl sulfoxide.

[0063] Step (2) Get a certain amount of DMSO-solvated graphene film (such as graphene quality is 10mg) and join in 5g epoxy resin, then add 2mL acetone solvent, the mixing system is 1000rpm at a speed of 1000rpm After stirring for 1 hour under the same conditions, ultrasonication was performed for 30 minutes under ...

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Abstract

The invention discloses a single-layer graphene macromolecular composite epoxy resin adhesive and a preparation method thereof. The method comprises the following steps: (1) preparing a solvated graphene film; (2) mixing the solvated graphene film with an epoxy resin solution, and then removing the solvent from the mixed solution to obtain the single-layer graphene macromolecular composite epoxy resin adhesive; wherein the graphene film is obtained by suction filtration of a single-layer graphene dispersion, and the single-layer graphene dispersion is obtained by direct thermal reduction or chemical reduction of single-layer graphene oxide. The solvent for the solvation is an organic solvent capable of simultaneously dispersing graphene and epoxy resin, such as dimethyl sulfoxide. The solvation completely avoids re-aggregation of the single-layer graphene, and ensures a single-layer structure. The single-layer graphene molecular composite epoxy resin adhesive can be obtained without using complicated technology. The graphene exists in a single layer rather than agglomerate in the adhesive, so a very small amount (0.01 wt%) of graphene can significantly improve the performance of the epoxy resin adhesive, such as adhesive property.

Description

technical field [0001] The invention belongs to the field of adhesives, and in particular relates to an epoxy resin adhesive compounded with single-layer graphene macromolecules and a preparation method thereof. Background technique [0002] As a typical two-dimensional macromolecule, graphene has excellent physical and chemical properties. Graphene-enhanced traditional polymer materials is one of the important application fields of graphene. Graphene can significantly improve the mechanical, electrical, thermal, magnetic and other properties of different polymer materials. As a special-purpose polymer material, polymer-based adhesives such as epoxy resins have important applications in industrial production and daily life. However, traditional polymer binders have disadvantages such as low bonding strength and single performance such as poor electrical conductivity. Therefore, by compounding other materials such as carbon nanomaterials, the bonding performance of epoxy r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04
CPCC09J11/04C09J163/00C08K3/042
Inventor 李春曲良体杜文城陈泓武
Owner TSINGHUA UNIV
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