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Preparation method of carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material

A carbon nanotube and epoxy resin technology, which is applied in the field of preparation of carbon nanotube-carbon fiber hybrid reinforced epoxy resin composite materials, can solve problems such as the reduction of fiber mechanical properties, achieve performance improvement, increase shear strength, and improve infiltration. sexual effect

Inactive Publication Date: 2018-12-11
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method can significantly improve the interfacial properties of fibers and resins, but inappropriate preparation methods will significantly reduce the mechanical properties of fibers

Method used

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  • Preparation method of carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material
  • Preparation method of carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the carbon nanotube-carbon fiber hybrid reinforced epoxy resin composite material provided in this embodiment includes the following steps in order:

[0029] (1) Modification of carbon fiber surface:

[0030] The commercially available industrial grade JT300A carbon fiber was immersed in analytically pure ammonia water, etched at 25°C for 12 hours, and then the carbon fiber was washed with deionized water several times to remove residual ammonia water on the surface; the carbon fiber treated with ammonia water Immerse in concentrated nitric acid of analytical grade, oxidize at 115°C for 5 minutes at a constant temperature, and then wash the carbon fiber with deionized water several times to remove residual nitric acid on the surface; finally put it in a vacuum drying oven and dry it at a drying temperature of 100°C Vacuum dried for 3 hours for later use.

[0031] (2) prepare the sizing agent containing carbon nanotubes:

[0032] Add 20g of TG...

Embodiment 2

[0040] The preparation method of the carbon nanotube-carbon fiber hybrid reinforced epoxy resin composite material provided in this embodiment includes the following steps in order:

[0041] (1) Modification of carbon fiber surface:

[0042] Commercially available industrial grade JT300A carbon fibers were immersed in analytically pure ammonia water, etched at 25°C for 24 hours, and then the carbon fibers were washed with deionized water for several times to remove residual ammonia water on the surface; the carbon fibers treated with ammonia water Immerse in concentrated nitric acid of analytical grade, oxidize at a constant temperature of 115°C for 10 minutes, then wash the carbon fiber with deionized water several times to remove residual nitric acid on the surface; Vacuum dried for 3h for later use.

[0043] (2) prepare the sizing agent containing carbon nanotubes:

[0044] Add 20g of TGDDM resin, 1.0g of carboxylated multi-walled carbon nanotubes with a diameter of 40-60...

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Abstract

The invention provides a preparation method of a carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material. The preparation method comprises the following steps: carrying out modification treatment on surfaces of carbon fibers; preparing a sizing agent of carbon-containing nanotubes; preparing a carbon nanotube-carbon fiber enhanced body; preparing a carbon-containing nanotube enhanced epoxy resin matrix; and preparing the carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material and the like. Compared with a traditional carbon fiber enhanced epoxy resin composite material, the carbon nanotube-carbon fiber mixed enhanced epoxy resin composite material has the advantages that the mechanical properties are obviously improved; and the interfacial shear strength is improved by 34 to 42 percent and the inter-laminar shear strength of the composite material is improved by 31 to 34 percent. The preparation method of the composite material, provided by the invention, has the advantages of simple molding technology, excellent mechanical properties and the like.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing a carbon nanotube-carbon fiber mixed reinforced epoxy resin composite material. Background technique [0002] Due to the characteristics of low density, high strength, high modulus and corrosion resistance, carbon fiber reinforced resin matrix composites (CFRP) have been widely used in aviation, aerospace, automobiles, sports equipment and other fields. However, due to the surface inertness of carbon fibers and the lack of surface functional groups, the bonding strength of the fiber-resin interface in carbon fiber-reinforced resin matrix composites is low, which limits the load transfer and thus affects the overall performance of the composite. There is a problem of weak interlayer performance, which greatly limits the application of carbon fiber reinforced resin matrix composites. [0003] Compared with carbon fiber-rein...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/02C08K7/06C08K3/04C08J5/06
CPCC08J5/06C08J2363/00C08K3/041C08K7/06C08K9/02C08K2201/011
Inventor 李娜路鹏程孙凌丰
Owner CIVIL AVIATION UNIV OF CHINA
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