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A method of loading carbon nanotubes on the surface of carbon fiber

A carbon nanotube and carbon fiber technology, which is applied to the field of carbon nanotubes on the surface of carbon fibers, can solve the problems of insufficient grafting efficiency of carbon nanotubes, failure to reflect the advantages of large-scale production, and difficulty in large-scale production. The effect of obvious efficiency, low cost and easy industrial production

Active Publication Date: 2019-03-22
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most researchers introduce carbon nanomaterials to the surface of carbon fibers. For example, Chinese patent application 103409985A discloses a preparation method of carbon nanotube-loaded carbon fibers, which discloses that carbon nanotubes with rich active groups on the surface are loaded into the liquid phase oxidation process. Treated carbon fiber surface, the tensile strength and tensile modulus of the carbon fiber / epoxy resin composite material prepared in this way all have the improvement, but the implementation method includes the oxidation treatment of carbon nanotubes, the surface grafting treatment of carbon nanotubes, There are multiple steps such as oxidation treatment of carbon fibers, and the process is complicated, which fails to reflect the superiority of large-scale production; another example is the Chinese patent application number 201310269480.7 which discloses a method for surface modification of carbon fiber plasma grafted carbon nanotubes. The method is to introduce a large number of polar groups on the surface of carbon fibers, and then graft carbon nanotubes, which requires secondary treatment on the surface of carbon fibers by chemical methods. The process is cumbersome, and the grafting efficiency of carbon nanotubes on the surface of carbon fibers is not obvious. reflect
The above-mentioned method is complex in process, cumbersome in operation, and is not easy to carry out large-scale production

Method used

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  • A method of loading carbon nanotubes on the surface of carbon fiber
  • A method of loading carbon nanotubes on the surface of carbon fiber
  • A method of loading carbon nanotubes on the surface of carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Set up a washing tank in the washing section of the carbon fiber tow. The washing tank contains a solution of aminated carbon nanotubes. The diameter of the carbon nanotubes is 10nm to 20nm, and the length is ≤5μm. It is ultrasonically dispersed in deionized water to make a concentration of 0.05wt. .% solution; a carbon nanotube dust chamber is set between the sizing and drying sections of the carbon fiber tow, the air velocity in the dust chamber is 2m / s, and the feeding speed is 0.001g / min. After the production process conditions are set, a carbon fiber product with carbon nanotubes loaded on the surface is obtained in a continuous production process.

[0028] Prepare epoxy resin-based composite material with this carbon fiber product, carbon fiber volume content is controlled at 65%, and the composite material interlaminar shear strength that obtains reaches 94MPa, and in the split surface of composite material, a large amount of resin ( Figure 4 ), indicating that ...

Embodiment 2

[0030] Set up a washing tank in the washing section of the carbon fiber tow. The washing tank contains an aminated carbon nanotube solution with a diameter of 10nm-20nm and a length of ≤5μm, which is ultrasonically dispersed in deionized water to make a concentration of 0.03wt. .% solution; a carbon nanotube dust chamber is set between the sizing and drying sections of the carbon fiber tow, the air velocity in the dust chamber is 1.5m / s, and the feeding speed is 0.001g / min. After the production process conditions are set, a carbon fiber product with carbon nanotubes loaded on the surface is obtained in a continuous production process.

[0031] The carbon fiber product is used to prepare an epoxy resin-based composite material, and the carbon fiber volume content is controlled at 70%, and the interlaminar shear strength of the obtained composite material reaches 97MPa; the interlaminar shear strength of the carbon fiber epoxy resin-based composite material without carbon nanotub...

Embodiment 3

[0033] Set up a washing tank in the washing section of the carbon fiber tow. The washing tank contains a solution of carboxylated carbon nanotubes. The diameter of the carbon nanotubes is 10nm-20nm and the length is ≤5μm. It is ultrasonically dispersed in deionized water to make a concentration of 0.05wt. % solution; a carbon nanotube dust chamber A is set between the sizing and drying sections of the carbon fiber tow, the air velocity in the dust chamber A is 2.5m / s, and the feeding speed is 0.002g / min. After the production process conditions are set, a carbon fiber product with carbon nanotubes loaded on the surface is obtained in a continuous production process.

[0034] The carbon fiber product is used to prepare epoxy resin-based composite materials, the carbon fiber volume content is controlled at 60%, and the interlaminar shear strength of the obtained composite material reaches 89MPa; Cut to 79MPa.

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Abstract

The invention discloses a method for loading a carbon fiber surface with carbon nanotubes. The method comprises treating carbon fiber filament bundles from a carbon fiber preparation phase washing workshop section through a carbon nanotube solution, carrying out sizing, carrying out treatment through a carbon nanotube dust raising chamber, carrying out drying and introducing the carbon nanotubes to the carbon fiber surfaces so that the carbon fibers with nanostructured surfaces are obtained. The method has simple processes, utilizes simple equipment and can be easily promoted and used in actual production. A resin-based composite material prepared from the carbon fibers obtained by the method has high interface performances.

Description

technical field [0001] The invention relates to a method for modifying the surface of carbon fibers, in particular to a method for loading carbon nanotubes on the surface of carbon fibers. Background technique [0002] As a high-performance fiber, carbon fiber has become the most important reinforcing material for resin-based composites in recent years because of its high specific strength, high specific modulus, small thermal expansion coefficient, low friction coefficient, and good low temperature resistance. The properties of composite materials are not only related to the properties of the reinforcement and the matrix, but also have a great relationship with the interface bonding strength of the reinforcement and the matrix. [0003] Good interfacial bonding can effectively transfer loads and improve the mechanical properties of composite materials. If the interfacial shear strength of the material is low, when the material is destroyed, cracks mainly develop in the int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74C08L63/00C08L67/06C08L79/08C08L61/06C08L79/04D06M101/40
Inventor 杨青何州文兰逢涛刘辉陈新
Owner STATE GRID CORP OF CHINA
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