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Preparation method of graphene-enhanced epoxy resin adhesive

A technology of epoxy resin and epoxy resin matrix, applied in the direction of epoxy resin glue, adhesive, adhesive type, etc., can solve the problems of low tensile strength, low shear strength, weak elasticity, etc., and achieve bonding performance Excellent, improved bonding strength, and low cost effects

Inactive Publication Date: 2015-11-25
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low shear strength, low tensile strength, weak elasticity and low hardness of existing epoxy resin adhesives, and to provide a preparation method utilizing graphene to strengthen epoxy resin adhesives. The method of drying and ultrasonic dispersion uniformly disperses the graphene in the epoxy resin matrix, and then prepares the epoxy resin adhesive reinforced by graphene

Method used

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  • Preparation method of graphene-enhanced epoxy resin adhesive

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specific Embodiment approach 1

[0021] Embodiment one: the preparation method of the graphene-enhanced epoxy resin adhesive of the present embodiment is prepared according to the following steps:

[0022] 1. Preparation of graphene by chemical redox method

[0023] Add graphite powder into the container, add concentrated sulfuric acid with a mass fraction of 98% into the container, put the container into an ice-water bath, and stir to obtain a mixture; reduce the stirring speed, and slowly add potassium permanganate and sodium nitrate to the in the mixture; then place the container in an ice bath for reaction, then react at room temperature, and then react in a water bath at 35°C; finally add hydrogen peroxide until the color turns golden yellow and no black matter exists, and a viscous solution is obtained;

[0024] The obtained viscous solution is separated by centrifugation to separate the precipitate, and the precipitate is dissolved in an ethanol solution with a mass fraction greater than 99.7%, and was...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment is different from Embodiment 1 in that the graphite powder described in step 1 is in the form of scales or powder. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the mass of the graphite powder described in step one and the volume ratio of concentrated sulfuric acid is 1g:(40ml~60ml). Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a preparation method of a graphene-enhanced epoxy resin adhesive, and relates to the preparation method of the epoxy resin adhesive. The preparation method aims at solving the problems that an existing epoxy resin adhesive is small in shearing strength, low in tensile strength, low in elasticity and low in hardness. According to the preparation method, graphene is uniformly dispersed in an epoxy resin matrix through a vacuum drying and ultrasonic scattering method, and the graphene-enhanced epoxy resin adhesive is prepared. The preparation method specifically includes the following steps of firstly, preparing graphene through a chemical oxidoreduction method; secondly, scattering graphene in the epoxy resin matrix; thirdly, preparing a graphene-enhanced epoxy resin adhesive connector. Compared with pure epoxy resin, the preparation epoxy resin adhesive is more excellent, easy to operate, low in cost, environmentally friendly, high in bonding strength, and more beneficial for being applied to fields with high requirements for the bonding technology.

Description

Technical field: [0001] The invention relates to a preparation method of epoxy resin adhesive. Background technique: [0002] Graphene has excellent thermodynamic properties and is the strongest material in the world, with an ultimate strength of 130GPa and a tensile modulus of 1.01TPa. And the weight is light, the thermal conductivity is about 5000W / (m K), and the specific surface area is about 2600m 2 / g. The high mechanical properties of graphene make it attract much attention in the field of nanocomposites. In recent years, graphene has also been widely used in the field of adhesives. Through the excellent performance of graphene, the bonding performance of epoxy resin adhesives can be improved, and structural adhesives with excellent performance can be prepared, which has opened up new ideas for the development of adhesives. [0003] Epoxy resin adhesives have developed rapidly due to a series of excellent properties such as excellent mechanical properties, strong ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J163/00C09J11/04C09J11/08C09J11/00
Inventor 赵东宇栾冬雪韩春华王琳毕昌隆张锡文于悦
Owner HEILONGJIANG UNIV
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