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A kind of preparation method of waterborne graphene epoxy resin nanocomposite material

A nano-composite material, epoxy resin technology, applied in the field of preparation of water-based graphene/epoxy resin nano-composite materials, can solve the problem of difficult formation of chemical bonds, affecting the stress transmission and dispersion of epoxy resin nano-composites and substrates , poor wettability of graphene and epoxy resin, etc., to achieve excellent interfacial compatibility and binding force, easy to prepare and synthesize in large quantities, and the operation process is simple and controllable

Active Publication Date: 2016-08-17
QINGDAO REALEADER ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Graphene is currently the thinnest and hardest nanomaterial in the world, and its electron mobility exceeds 15,000 cm at room temperature. 2 / s, which is higher than that of carbon nanotubes or silicon crystals, and the resistivity is only about 10 -6 Ω.cm, which is lower than copper, and is one of the materials with the lowest resistivity in the world; however, the surface of graphene is inert, the surface energy is low, and the functional groups with chemical activity are few, resulting in poor wettability between graphene and epoxy resin , and it is also difficult to form a chemical bond between the two, which directly affects the stress transfer and dispersion between the epoxy resin nanocomposite and the matrix, and the high performance of graphene cannot be fully utilized; how to effectively realize graphene and water-based environment The compounding of epoxy resin, to improve the binding force, corrosion resistance and impact resistance of epoxy resin and matrix, has become a big problem to be solved by the present invention

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and react at 40 °C for 10 hours, then add ice water twice the volume of the mixed acid; stir evenly and cool to room temperature, then add graphite mass 3 times hydrogen peroxide solution reduction, after the reaction is completed, after washing and drying, graphene oxide is obtained;

[0019] (2) Take 2.4g of graphene oxide and polyvinylpyrrolidone according to the mass ratio of 5:1, then add 4.5g of aseptic acid, mix well, and obtain functionalized graphene after the reaction is completed;

[0020] (3) Disperse functionalized graphene in water to obtain 10ml of graphene aqueous dispersion with a concentration of 0.008g / ml;

[0021] (4) Add 0.59 g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 40 minutes, and then distill under reduced pressure under a vacuum of 0.1 MPa to remove water in t...

Embodiment 2

[0024] Example 2 (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and heat at 40 °C

[0025] React for 10 hours, then add ice water twice the volume of mixed acid. Stir evenly and cool to room temperature, then add a hydrogen peroxide solution 3 times the mass of graphite for reduction, and after the reaction is completed, wash and dry to obtain graphene oxide; (2) Take graphene oxide and polyvinylpyrrolidone according to the mass ratio of 1:3 1g in total, add 1.5g of aseptic acid, mix evenly, and obtain functionalized graphene after the reaction is completed; (3) Disperse the functionalized graphene in water to obtain 50ml of graphene aqueous dispersion with a concentration of 0.006g / ml;

[0026] (4) Add 3.4g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 50min, and then distill under reduced pressure under a vacuum of 0.1MPa to remove the water...

Embodiment 3

[0030] (1) Dissolve graphite in a mixed solution of concentrated sulfuric acid and concentrated phosphoric acid, add potassium permanganate and react at 40°C for 10 hours, then add ice water twice the volume of the mixed acid. Stir evenly and cool to room temperature, then add a hydrogen peroxide solution 3 times the mass of graphite for reduction, after the reaction is completed, wash and dry to obtain graphene oxide;

[0031] (2) Take 1.2g of graphene oxide and polyvinylpyrrolidone according to the mass ratio of 1:5, add 1.5g of aseptic acid, mix well, and obtain functionalized graphene after the reaction is completed;

[0032] (3) Disperse the functionalized graphene in water to obtain 100ml of graphene aqueous dispersion with a concentration of 0.005g / ml;

[0033] (4) Add 7.4g of epoxy resin to the above-mentioned graphene aqueous dispersion, stir at room temperature for 70min, and then distill under reduced pressure under a vacuum of 0.3MPa to remove the water in the syst...

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Abstract

The invention discloses a method for preparing a water-based graphene epoxy resin nanocomposite material. The specific steps are as follows: the graphene oxide obtained by the Hummers method is functionally modified and dispersed to obtain a high-concentration graphene aqueous dispersion; Add epoxy resin to the graphene aqueous dispersion, stir evenly, remove water under vacuum conditions and add curing agent to mix; after high temperature curing, the graphene / epoxy resin nanocomposite material is obtained, the operation process is simple and controllable, and it is easy to scale Batch preparation and synthesis; through the acquisition of highly stable graphene aqueous dispersion, graphene and epoxy resin have excellent interfacial compatibility and bonding force; effectively improve the bonding force between epoxy resin and substrate, corrosion resistance and Impact resistance: Compared with conventional water-based epoxy resin materials, the hardness of the water-based graphene / epoxy resin nanocomposite prepared by the present invention is increased by 1.5 times, and the impact resistance is increased by 12 times.

Description

technical field [0001] The invention belongs to the field of preparation of resin-based nanocomposites, in particular to a method for preparing water-based graphene / epoxy resin nanocomposites. Background technique [0002] Epoxy resin is an oligomer polymerized by molecules containing more than two epoxy groups. Due to the characteristics of high strength and low density, epoxy resin composite materials have gradually become one of the indispensable basic materials in the industrial field. However, with the strengthening of national environmental protection and labor protection of workers, the coating process of replacing organic solvents with water has become an important direction of coating development; water-based epoxy resin has the performance of solvent-based epoxy resin, and overcomes the pollution of solvent volatilization to the environment , has great application prospects in architectural coatings, anti-corrosion coatings, etc. However, the thermal stability, so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K9/04C08K3/04
Inventor 宋肖肖孙明娟王圆圆孟良
Owner QINGDAO REALEADER ADVANCED MATERIALS TECH
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