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Preparation method of carbon nano tube loaded carbon fiber

A technology of carbon nanotubes and multi-walled carbon nanotubes, which is applied in the fields of carbon fiber, fiber treatment, textiles and papermaking, etc. It can solve the problems of changing the surface inertia and achieve the effect of improving interface strength, roughness and mechanical properties

Active Publication Date: 2013-11-27
江苏三强复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of smooth surface of carbon fiber by simple method, change its surface inertness

Method used

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  • Preparation method of carbon nano tube loaded carbon fiber
  • Preparation method of carbon nano tube loaded carbon fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The method of loading carbon fibers with carbon nanotubes is carried out as follows:

[0026] 1. Oxidation treatment of carbon nanotubes

[0027] Add 2g of multi-walled carbon nanotubes to 200ml of mixed acid (concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 1:3) solution, place it in ultrasonic treatment at 20°C for 1h, and then stir the dispersed carbon nanotube acid solution in a 50°C water bath After the reaction is completed for 4 hours, it is cooled to room temperature, suction filtered, and washed with deionized water until it is neutral to obtain oxidized carbon nanotubes.

[0028] Two surface grafting treatment of carbon nanotubes

[0029] Add 1g of the oxidized carbon nanotubes to an ethanol solution containing 3-aminopropyltriethoxysilane coupling agent with a mass fraction of carbon nanotubes of 5%, stir and treat at 50℃ for 3h, filter with suction, 120℃ Dry in a vacuum oven for 4 hours to obtain grafted carbon nanotubes.

[0030] Three...

Embodiment 2

[0036] 1. Oxidation treatment of carbon nanotubes

[0037] Add 2g of multi-walled carbon nanotubes into 200ml of concentrated nitric acid solution, place it in 50℃ ultrasonic treatment for 1h, then stir and react the dispersed carbon nanotube acid solution in a 50℃ water bath for 4h, cool to room temperature after the reaction, and filter with suction , Washed with deionized water until it is neutral to obtain oxidized carbon nanotubes.

[0038] Two surface grafting treatment of carbon nanotubes

[0039] Add 1g of the oxidized carbon nanotubes to an ethanol solution containing 3-aminopropyltriethoxysilane with a mass fraction of carbon nanotubes of 5%, stir for 3 hours at 50°C, filter with suction, and vacuum dry at 120°C 4h to obtain grafted carbon nanotubes.

[0040] Three oxidation treatment of carbon fiber

[0041] Add 10g of carbon fiber with surface removal sizing agent to 100ml of concentrated nitric acid and heat it in an oil bath at 80℃ for 3h; after the reaction, let it stan...

Embodiment 3

[0045] 1. Oxidation treatment of carbon nanotubes

[0046] Add 2g of multi-walled carbon nanotubes to 200ml of concentrated nitric acid solution and place them in 50℃ ultrasonic treatment for 0.5h, then stir the dispersed carbon nanotube acid solution in a 50℃ water bath for 4h, cool to room temperature after the reaction, pump Filter and wash with deionized water until it is neutral to obtain oxidized carbon nanotubes.

[0047] Two surface grafting treatment of carbon nanotubes

[0048] Add 1g of the oxidized carbon nanotubes to an ethanol solution containing 1% carbon nanotubes with a mass fraction of 3-aminopropyltriethoxysilane, stir for 3 hours at 50°C, filter with suction, and vacuum dry at 120°C 4h to obtain grafted carbon nanotubes.

[0049] Three oxidation treatment of carbon fiber

[0050] Add 10g of carbon fiber with surface sizing agent to 1000ml of concentrated nitric acid and heat it in an oil bath at 80°C for 3h; after the reaction, let it stand to room temperature, fil...

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Abstract

The invention discloses a preparation method of carbon nano tube loaded carbon fiber, which belongs to the technical field of surface treatment of inorganic powder material. According to the invention, the carbon nano tube of which the surface is rich in active groups, is loaded to the surface of the carbon fiber after liquid phase oxidation treatment so as to increase the number of active groups on the surface of the carbon fiber and improve the chemical acting force of a base body and the surface of the carbon fiber on the one aspect, and to increase the surface roughness of the carbon fiber and improve the riveting action of the carbon fiber and the base body on the other aspect. Through the combined action on the two aspects, the mechanical property of a composite material is improved. After the carbon nano tube loading treatment, the tensile strength and the tensile modulus of the carbon nano tube loaded carbon fiber / epoxy resin composite material are increased by 17.4% and 44.8% respectively in comparison with those of the carbon fiber composite material without loading the carbon nano tube.

Description

Technical field [0001] The invention relates to a method for modifying carbon fibers with carbon nanotubes, and belongs to the technical field of surface treatment of inorganic powder materials. [0002] Background technique [0003] Carbon fiber has outstanding advantages such as light weight, good fineness, high tensile strength, high temperature resistance, friction resistance, electrical conductivity, heat conduction, and small expansion coefficient. Its density is less than 1 / 4 of steel, but its tensile strength is 7-9 times that of steel, and its tensile modulus of elasticity is also higher than that of steel. Due to its excellent performance, it has been widely used in many high-tech fields such as aviation, aerospace, automobile, sports, and power generation. However, because of its smooth surface and inertness, untreated carbon fiber has a weak interface bonding force with the resin, making it difficult to fully exert the reinforcing effect of carbon fiber. Therefore, b...

Claims

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Application Information

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IPC IPC(8): D06M11/74D06M11/64D06M101/40
Inventor 王标兵韦余康顾文娟
Owner 江苏三强复合材料有限公司
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