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Method for preparing modified graphene applicable to epoxy resin

A graphene modification and epoxy resin technology, applied in the field of nanocomposite preparation, can solve problems such as the influence of polymer matrix properties, the toxicity of reducing agents, and the inability to meet actual needs, and achieves good dispersion and compatibility. Resourceful Effects

Active Publication Date: 2019-03-12
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, stabilizers, protective agents and modifiers are usually expensive, and reducing agents are usually toxic. A large number of cumbersome graphene modification work cannot meet the actual needs of industrial production, and also have a certain impact on the performance of the polymer matrix.

Method used

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  • Method for preparing modified graphene applicable to epoxy resin
  • Method for preparing modified graphene applicable to epoxy resin
  • Method for preparing modified graphene applicable to epoxy resin

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Dissolve 18.8 g urushiol, 40 g acetic acid, and 1 g concentrated sulfuric acid in 30 mL xylene, react at 30-50 ° C for 12 h, cool to room temperature, add 0.1 mol / L NaOH aqueous solution to wash until pH = 7, separate liquids, and remove water layer, take the organic phase and rotate to evaporate, remove excess acetic acid, and obtain the product epoxidized urushiol. The obtained epoxidized urushiol and the graphene oxide prepared by the Hummer method were respectively dissolved and dispersed in N,N-dimethylformamide (DMF) solvent to prepare epoxidized urushiol with a concentration of 50mg / mL and 10mg / mL graphene oxide dispersion. Equal masses of the two solutions were mixed, reacted at 100° C. for 8 hours under a nitrogen atmosphere, filtered and washed repeatedly to obtain graphene oxide reduced and modified by epoxidized urushiol. Disperse the above 0.3g of epoxidized urushiol-modified reduced graphene oxide in 100g of bisphenol A epoxy resin labeled 601-75, add 50g...

Embodiment 2

[0037]Put 18.8 g of cardanol, 40 g of formic acid and 30 mL of xylene at 30-50 ° C for 12 h, cool to room temperature, add 0.1 mol / L NaOH aqueous solution to wash until pH = 7, separate the liquids, remove the water layer, take the organic phase and spin evaporate , to remove excess acetic acid to obtain the product epoxidized urushiol. The obtained epoxidized cardanol and graphene oxide prepared by the Hummer method were respectively dissolved and dispersed in N,N-dimethylformamide (DMF) solvent to prepare epoxidized cardanol with a concentration of 50mg / mL and 10mg / mL graphene oxide dispersion. Equal masses of the two solutions were mixed, reacted at 100° C. for 8 hours under a nitrogen atmosphere, filtered and repeatedly washed to obtain epoxidized cardanol-reduced and modified graphene oxide. Disperse the above 0.3g of epoxidized cardanol-modified reduced graphene oxide in 100g of bisphenol A epoxy resin labeled 601-75, add 50g of acetone and 100g of xylene, stir thorough...

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Abstract

The invention discloses a method for preparing modified graphene applicable to epoxy resin. According to the method, green renewable Chinese lacquer tree extract urushiol or cashew nut shell extract cardanol is used as a main raw material, and unsaturated double bonds on the long side chain of the main raw material and fatty acid are enabled to be subjected to an epoxidation reaction, so that urushiol glycidyl ether or cardanol glycidyl ether with a phenolic hydroxyl group can be obtained; the urushiol glycidyl ether or the cardanol glycidyl ether is used as a reducing agent and a modifier forgraphene oxide, so that the modified graphene which contains a large amount of long carbon chains and epoxy groups on the surface and has good dispersity in epoxy resin can be obtained. The method provided by the invention adopts the natural renewable compounds, i.e., the urushiol and the cardanol as the main raw materials, and has the characteristics of being environment-friendly, simple in process, low in production cost and the like, thus being easy to popularize and use. The modified graphene prepared by the method has good compatibility in the epoxy resin, improves the interfacial adhesion of a graphene / epoxy resin composite material, and can significantly improve the mechanical properties and corrosion resistance of the epoxy resin.

Description

technical field [0001] The invention belongs to the field of preparation of nanocomposite materials, and in particular relates to a modification preparation method of graphene and preparation of modified graphene / epoxy resin composite materials. Background technique [0002] Epoxy resin coatings have the advantages of excellent chemical corrosion resistance, excellent adhesion, low shrinkage and low price, and are currently a class of anti-corrosion coatings widely used. However, the high crosslinking density of the pure epoxy resin coating after curing leads to large internal stress, hard and brittle texture, and lack of impact resistance. The reduced corrosion resistance makes it difficult for epoxy coatings to meet the requirements of practical application of engineering technology. Traditional modification methods are mainly through rubber modification, filling with inorganic fillers (such as Zn powder), expansion monomers, etc. With the development of the marine chemi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/08C09D7/62
CPCC09D5/08C09D163/00C09D7/62C08K9/04C08K3/042
Inventor 郑雪琳杨俊威朱虎陈登龙刘成峰
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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