High-bending strength oxidized carbon nanomaterial/carbon fiber/epoxy resin composite material and preparation method thereof

A technology for oxidizing nano-carbon and composite materials, applied in the field of composite materials, can solve the problems of improving the performance of nano-carbon materials/carbon fiber/epoxy resin composite materials, production and application limitations, unfavorable industrialized production, long reaction routes, etc. The effect of outstanding performance, environmental protection and efficiency improvement

Active Publication Date: 2015-04-29
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods all need to carry out multi-step organic chemical reactions, the reaction route is long, the purification steps are many, and the energy consumption is large, which is not conducive to industrial production; Solvents or reagents, etc., the processing cycle is long, which is not good for the environment
[0014] Due to the above problems, the performance improvement, production and application of carbon nanomaterials / carbon fiber / epoxy resin composites are greatly limited.

Method used

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  • High-bending strength oxidized carbon nanomaterial/carbon fiber/epoxy resin composite material and preparation method thereof
  • High-bending strength oxidized carbon nanomaterial/carbon fiber/epoxy resin composite material and preparation method thereof
  • High-bending strength oxidized carbon nanomaterial/carbon fiber/epoxy resin composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0072] Triglycidyl p-aminophenol and graphene oxide aqueous dispersion with a mass concentration of 0.1wt% are mixed at room temperature at a weight ratio of 1:250, and mechanically stirred at a speed of 100 rpm at 25°C for 2 minutes, then ready It is observed that the water phase becomes clear, and the graphene oxide is all transferred to the triglycidyl p-aminophenol, and the clear water is poured out, and the mixture is heated at 230° C. in a vacuum oven for 2 minutes to obtain graphene oxide / Triglycidyl p-aminophenol mixture. Add 62.5 parts by weight of triglycidyl p-aminophenol to 14.5 parts by weight of the above mixture for dilution, and then add 23 parts by weight of curing agent thiomethyltoluenediamine. In order to determine the content of graphene oxide, a small amount of the mixture was heated and solidified at 200°C, and then the weight content of graphene oxide was determined to be 3wt% by thermogravimetric method. Its test temperature ranges from room temperat...

Embodiment 2

[0075] Triglycidyl p-aminophenol and graphene oxide water dispersion with a mass concentration of 0.5wt% are mixed at room temperature at a weight ratio of 1:5, and mechanically stirred at a speed of 1000 rpm at 10°C for 4 minutes. It is observed that the water phase becomes clear, and the graphene oxide is all transferred to triglycidyl p-aminophenol, and the clear water is poured out, and the mixture is heated at 170° C. in a vacuum drying oven for 10 minutes to obtain graphene oxide / Triglycidyl p-aminophenol mixture. Add 5 parts by weight of the mixture to 70 parts by weight of triglycidyl p-aminophenol for dilution, and then add 25 parts by weight of curing agent thiomethyltoluenediamine. The weight content of graphene oxide was measured to be 0.1wt%. The graphene oxide / epoxy resin / curing agent mixture was composited with unidirectional carbon fiber cloth (T300, Toray, Japan) by hand lay-up method, cured under pressure on a flat vulcanizer, cured at 170°C for 3 hours, an...

Embodiment 3

[0077] Triglycidyl p-aminophenol and graphene oxide aqueous dispersion with a mass concentration of 0.25wt% were mixed at room temperature with a weight ratio of 1:10, and after mechanical stirring at 100 rpm at 25°C for 0.5 minutes, the aqueous phase When it becomes clear, the graphene oxide is all transferred to triglycidyl p-aminophenol, the clear water is poured out, and the mixture is heated to 230°C for spray drying, and the heating time is 2 minutes to obtain graphene oxide / triglycidyl p-Aminophenol mixture. 10 parts by weight of the mixture were diluted with 60 parts by weight of triglycidyl p-aminophenol, and then 30 parts by weight of curing agent diaminodiphenyl sulfone was added. It is measured that the weight content of graphene oxide is 0.2wt%. The graphene oxide / epoxy resin / curing agent mixture was composited with unidirectional carbon fiber cloth (T300, Toray, Japan) by hand lay-up, and cured under pressure on a flat vulcanizer, cured at 170°C for 1 hour, and ...

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Abstract

The invention provides a high-bending strength fiber-reinforced epoxy resin composite material. The preparation method comprises the following steps: simply stirring for rapidly transferring an oxidized carbon nanomaterial from an aqueous phase to an epoxy resin mixture containing N,N-diglycidyl p-hydroxylaniline glycidyl ether; performing water removal and high-temperature treatment, adding a curing agent, compounding with carbon fibers, curing and forming. The composite material is simple and high-efficiency, the oxidized carbon nanomaterial does not need to be subjected to acylating chlorination and other chemical modifications, any organic solvent is not used, the processing time is short, the energy consumption is low, and industrialization is easily realized; and meanwhile, the carbon nanomaterial is high in content and uniform in dispersion, the mechanical property of the composite material is outstanding, the bending strength can be 2.5GPa or over, and the increase amplitude is over 1-fold (the highest amplitude can reach 160 percent). The composite material disclosed by the invention can be used for preparing high-strength and high-modulus carbon fiber reinforced composite materials and can be widely applied to the fields such as aerospace, automobiles, building or bridge reinforcement, power electronics and sport equipment.

Description

technical field [0001] The invention relates to composite materials, in particular to a fiber-reinforced epoxy resin composite material with high bending strength, in particular to a high bending strength oxidized nano-carbon material / carbon fiber / epoxy resin composite material and a preparation method thereof. Background technique [0002] Due to the advantages of high strength, high modulus and light weight at the same time, carbon fiber / epoxy resin composite materials have been widely used in the fields of aerospace, construction, ships, rail transit, automobiles and sports equipment. As an adhesive for carbon fiber composite materials, epoxy resin has excellent physical and mechanical properties, electrical insulation properties, chemical resistance and bonding properties. Compared with other thermosetting resins, epoxy resins have the most types and grades and different properties, so that epoxy resins can meet various practical and process performance requirements. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/32C08G59/50C08G59/56C08G59/40C08K3/04C08K7/00C08K7/06C08L63/00
Inventor 彭懋唐欣磊肖国花
Owner ZHEJIANG UNIV
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