Method for preparing graphene/epoxy resin composite

A technology of epoxy resin and composite materials, which is applied in the field of preparation of epoxy resin composite materials, can solve the problems of high brittleness, poor impact resistance, cracking and other problems of epoxy resin, and achieve the improvement of glass transition temperature, simple method and dispersion effect Good results

Inactive Publication Date: 2014-11-12
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that existing epoxy resins have high brittleness, poor impact resistance and prone to cracking, and provide a preparation method of graphene / epoxy resin composites

Method used

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  • Method for preparing graphene/epoxy resin composite
  • Method for preparing graphene/epoxy resin composite
  • Method for preparing graphene/epoxy resin composite

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specific Embodiment approach 1

[0025] Specific embodiment one: present embodiment is a kind of preparation method of graphene / epoxy resin composite material, specifically is finished according to the following steps:

[0026] 1. Preparation of graphene by chemical oxidation method: 1. Add flake graphite powder into the container, then add concentrated sulfuric acid with a mass fraction of 90% to 98% in the container, put the container into an ice-water bath, and stir at a stirring speed Stir for 30min to 60min under the condition of 250r / min~300r / min; then add potassium permanganate and sodium nitrate respectively under the condition of stirring speed of 150r / min~200r / min, and then React for 2h~3h under the condition of 200 / min; then react for 2h~4h under the condition of room temperature and stirring speed of 150r / min~200r / min; Add hydrogen peroxide with a mass fraction of 30% to 35% into the container to obtain a viscous solution;

[0027] The mass and mass fraction of the flaky graphite powder described...

specific Embodiment approach 2

[0043] Embodiment 2: This embodiment differs from Embodiment 1 in that the epoxy resin described in Step 2 is Epoxy Resin E-51, Epoxy Resin E-44 or Epoxy Resin E-42. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0044] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the specific operation steps of the method for the two-phase extraction described in step 2 are: first the graphene / ethanol mixed solution is added to the epoxy resin , and then stirred until the ethanol solution in the graphene / ethanol mixed solution changed from brownish yellow to colorless, then stopped stirring, and then removed the upper ethanol solution to complete the two-phase extraction. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method for preparing epoxy resin composite, in particular to a method for preparing graphene/epoxy resin composite. The method aims to solve the problems that existing epoxy resin is high in brittleness, poor in impact resistance and prone to cracking. The method comprises the steps that first, graphene is prepared through a chemical oxidation method, second, the graphene is dispersed in epoxy resin, and third, the graphene and the epoxy resin are compounded. The method has the advantages that the preparation method is simple, ethyl alcohol is adopted as solvent, organic solvent is avoided, better environment friendliness is achieved, and the ethyl alcohol is volatile and is easy to eliminate, and has no influence on preparation of the graphene/epoxy resin composite; compared with pure epoxy resin, tensile strength of the graphene/epoxy resin composite is improved by 34.9%-124.8%, impact strength of the graphene/epoxy resin composite is improved by 15.4%-105.1%, and glass-transition temperature is improved by 5-19 DEG C.

Description

technical field [0001] The invention relates to a preparation method of epoxy resin composite material. Background technique [0002] Epoxy resin (Epoxy Resin) is a polymer thermosetting synthetic material that has been widely used in recent years. It has excellent adhesive properties, corrosion resistance and electrical insulation properties, and has been widely used in structural bonding materials. , corrosion-resistant coatings, electrical insulation materials and composite material substrates, etc. It plays an important role in many industrial fields such as electrical electronics, machinery manufacturing, chemical anticorrosion, ship docks, aerospace, etc., and is one of the indispensable basic materials in various industrial fields. Epoxy resin has so many applications because of its excellent mechanical properties, electrical insulation properties, low shrinkage, good bonding performance, chemical resistance, good processing performance, and low price. However, sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C08K7/00C08K3/04
Inventor 赵东宇韩春华王琳付敬雯
Owner HEILONGJIANG UNIV
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