A carbon fiber reinforced composite material with high interfacial strength and strong interfacial conductivity and its preparation method

A technology to enhance composite materials and interface strength, applied in the field of carbon fiber resin matrix composite materials, can solve the problems of poor interface bonding of composite materials, weak conductivity of composite material interfaces, etc., and achieve a controllable, simple and efficient self-assembly process, and can improve The effect of adding amount and good conductivity

Active Publication Date: 2022-06-21
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the hydrothermal self-assembly method, the uniform distribution of nanoparticles on the carbon fiber and the controllable grafting amount can be realized by adjusting the ratio of ethylene glycol solvent and nanoparticles. The uniform and stable dispersion in the resin matrix prepares a composite material with excellent mechanical properties, high interfacial bonding strength, and good electrical conductivity, which solves the problem of poor interfacial bonding of the composite material due to the inert surface of the carbon fiber that does not match the resin matrix. As well as the problem of weak interfacial conductivity of composite materials due to poor conductivity of the resin matrix, it has guiding significance for the preparation of carbon fiber reinforced composites with high interfacial strength and strong interfacial conductivity

Method used

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  • A carbon fiber reinforced composite material with high interfacial strength and strong interfacial conductivity and its preparation method
  • A carbon fiber reinforced composite material with high interfacial strength and strong interfacial conductivity and its preparation method
  • A carbon fiber reinforced composite material with high interfacial strength and strong interfacial conductivity and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0027] The mass fractions of epoxy resin, amine curing agent, accelerator and nanoparticles are prepared according to the ratio of 100:30:0.5:0.5. The epoxy resin adopts the compound of glycidyl ether type epoxy resin 662 and diglycidyl endemethylene tetrahydrophthalate, and the amine curing agent adopts triethylenetetramine (TETA) and 3,3-dimethyl The compound of dimethyl-4,4-diaminodicyclohexylmethane (DMDC), the accelerator adopts 2-ethyl-4-methylimidazole (2E4MZ), the nanoparticle adopts carboxylated carbon tube, and the carbon fiber adopts Japan Toray The company's T800H-12K. The preparation process is as follows: adjust the ratio of ethylene glycol and carboxylated carbon tubes to 100:0.1, after mixing evenly, transfer to a hydrothermal reactor together with carbon fibers, the pressure is 1 MPa, and first react in a blast oven at 160 ° C for 4 hours, Then react in a blast oven at 100 ° C for 4 hours to obtain modified carbon fibers; add carboxylated carbon tubes to epox...

Embodiment 2

[0032] The mass fractions of epoxy resin, amine curing agent, accelerator and nanoparticles are prepared according to the ratio of 100:10:1:1. The epoxy resin adopts the compound of bis-resorcinol acetal tetraglycidyl ether, phthalate epoxy resin (731) and 4,4-diaminodiphenylmethane tetraglycidylamine, amine curing agent Polyetheramine D-400 was used, 2-ethyl-4-methylimidazole (2E4MZ) was used as the accelerator, aminated carbon nanotubes were used for the nanoparticles, and T800H-12K from Japan Toray Company was used as the carbon fiber. The preparation process is as follows: adjust the ratio of ethylene glycol and aminated carbon nanotubes to 100:3, after mixing evenly, transfer to a hydrothermal reactor together with carbon fibers, the pressure is 2MPa, and first react in a blast oven at 180 °C 7h, and then reacted in a blast oven at 120 °C for 5h to obtain modified carbon fibers; the aminated carbon nanotubes were added to the epoxy resin according to the proportion, and t...

Embodiment 3

[0037] The mass fractions of epoxy resin, amine curing agent, accelerator and nanoparticles are prepared according to the ratio of 100:20:1.5:1. The epoxy resin adopts the compound of bis-resorcinol acetal tetraglycidyl ether and endomethylene tetrahydrophthalate diglycidyl ester, and the amine curing agent adopts 3,3-dimethyl-4,4 - Compound of diaminodicyclohexylmethane (DMDC) and polyetheramine D-400, 2-ethyl-4-methylimidazole (2E4MZ) is used as accelerator, silanized carbon nanotubes are used for nanoparticles, and carbon fibers are used T800H-12K from Toray Corporation of Japan. The preparation process is as follows: adjust the ratio of ethylene glycol and silanized carbon nanotubes to 100:0.5, after mixing evenly, transfer to a hydrothermal reactor together with carbon fibers, the pressure is 1.5MPa, and first react in a blast oven at 170 °C 5h, and then reacted in a blast oven at 110°C for 4h to obtain modified carbon fibers; silanized carbon nanotubes were added to the...

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Abstract

The invention prepares a carbon fiber reinforced composite material with high interface strength and strong interface conductivity and a preparation method thereof. The modified resin matrix of carbon fiber reinforced composites includes epoxy resin, curing agent, accelerator, and nanoparticles. Using the method of hydrothermal self-assembly, the uniform distribution of nanoparticles on the carbon fiber and the controllable grafting amount can be realized by adjusting the ratio of ethylene glycol solvent and nanoparticles. The uniform and stable dispersion in the resin matrix prepares a composite material with excellent mechanical properties, high interfacial bonding strength and good electrical conductivity, which solves the problems of weak interfacial bonding and poor interfacial conductivity of carbon fiber reinforced composite materials. High interfacial strength and The preparation of carbon fiber reinforced composites with strong interfacial conductivity is instructive.

Description

technical field [0001] The invention relates to the field of carbon fiber resin-based composite materials, and mainly relates to a carbon fiber reinforced composite material with high interface strength and strong interface conductivity and a preparation method thereof. Background technique [0002] Carbon fiber resin matrix composites have excellent properties such as high modulus, high tensile strength, low density and corrosion resistance, and are widely used in transportation, aerospace, wind power generation and sporting goods. However, due to the surface inertness of unmodified carbon fibers, the interfacial interaction between them and the resin matrix is ​​weak, resulting in low interfacial shear strength of composites, which limits the application of composites in some high-performance fields . In addition, carbon fiber, as a carbon material, has excellent electrical conductivity, while epoxy resin has poor electrical conductivity, which makes carbon fiber reinforc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08K7/06C08K9/02C08K3/04C08K9/04C08K9/06C08K3/34C08J5/06
CPCC08J5/06C08J5/005C08K2201/011C08K2201/001C08J2363/00C08J2463/00C08K3/042C08K3/041C08K7/06C08K3/346C08K9/02C08K9/04C08K9/06
Inventor 贾晓龙贾丽颖刘聪马文丽齐鹏飞还献华杨小平
Owner BEIJING UNIV OF CHEM TECH
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