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Preparation method of graphene/carbon nano tube-reinforced and toughened carbon fiber composite material

A carbon nanotube, strengthening and toughening technology, applied in the field of graphene composite materials, can solve problems such as poor toughness, and achieve the effects of fewer steps, simple process, and improved tensile strength

Active Publication Date: 2017-08-18
HANGZHOU CHAOTAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Choose a tough sizing solution with a protective layer effect to effectively improve the reprocessing performance of carbon fibers and overcome the shortcomings of poor toughness of carbon fibers

Method used

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  • Preparation method of graphene/carbon nano tube-reinforced and toughened carbon fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Preparation of three-dimensional graphene flocs

[0052] Add 40mL H to a 500mL beaker 2 SO 4 (mass fraction 98%) and 6g (NH 4 ) 2 S 2 o 8 , stirred to (NH 4 ) 2 S 2 o 8 Dissolve, add 1.5g of graphite powder (32 mesh), mechanically stir for 30min, slowly add 5mL of 30wt% H 2 o 2 After standing at room temperature for 8 hours, the expanded graphene aggregates were obtained, washed with water until neutral, and dried in a dryer at 60°C for 12 hours to obtain three-dimensional graphene flocs.

[0053] (2) Preparation of surface modification of carbon nanotubes

[0054] Add 40mL H to a 500mL beaker 2 SO 4 (98%) and 6g (NH 4 ) 2 S 2 o 8 , stirred to (NH 4 ) 2 S 2 o 8 Dissolve, add 3g multi-walled carbon nanotubes (diameter 60nm), mechanically stir for 30min, slowly drop 5mL H 2 o 2 , after standing at room temperature for 8 hours, acid-modified carbon nanotubes were obtained, washed with water until neutral, and dried in a dryer at 60° C. for 12 hou...

Embodiment 2

[0060] (1) with embodiment 1;

[0061] (2) with embodiment 1;

[0062] (3) Preparation of graphene / modified carbon nanotube sizing agent

[0063] Take 1.5g of sodium lauryl sulfate, add it to 92.5g of epoxy resin solution, and wait for the sodium lauryl sulfate to dissolve. Add the three-dimensional graphene flocs prepared in Step 1 (1) and the surface-modified carbon nanotubes prepared in Step 5 (2) in sequence, and stir at 1000 rpm for 30 min. Placed in an ultrasonic crusher, ultrasonic power 800W, continuous ultrasonic 60min.

[0064] (4) with embodiment 1.

Embodiment 3

[0066] (1) with embodiment 1;

[0067] (2) with embodiment 1;

[0068] (3) Preparation of graphene / modified carbon nanotube sizing agent

[0069] Get 1.5g polyvinylpyrrolidone, add in the epoxy resin solution of 92.5g, after the polyvinylpyrrolidone dissolves. Add 3 g of the three-dimensional graphene floc prepared in step (1) and 3 g of the surface-modified carbon nanotubes prepared in step (2) in sequence, and stir at 1000 rpm for 30 min. Placed in an ultrasonic crusher, ultrasonic power 1200W, continuous ultrasonic 120min.

[0070] (4) with embodiment 1.

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Abstract

The invention provides a preparation method of a graphene / carbon nano tube-reinforced and toughened carbon fiber composite material. The method comprises the steps of preparing a three-dimensional graphene floccule and a surface-modified carbon nano tube by using a strong acid and a breaker under the action of an oxidizing agent separately; then, carrying out high-speed shear mixing and ultrasonic dispersing processes to obtain a graphene / modified carbon nano tube sizing agent; and preparing the graphene / carbon nano tube-reinforced and toughened carbon fiber composite material through a sizing process. The prepared graphene / carbon nano tube-reinforced and toughened carbon fiber composite material has the characteristics of conductivity and thermal conductivity, high strength, high modulus, rubbing resistance and corrosion resistance of a carbon fiber, the characteristics of the tensile strength, the bending strength and the interfacial shear strength are significantly improved, the cycling processability of the carbon fiber is effectively improved, and the composite material has reinforcing and toughening characteristics.

Description

[0001] Technical field: [0002] The invention relates to the technical field of carbon fiber and graphene composite material, in particular to a method for preparing a reinforced and toughened carbon fiber composite material, in particular to a method for preparing a graphene / carbon nanotube reinforced and toughened carbon fiber composite material. [0003] Background technique: [0004] Carbon fiber is widely used in bicycles, aerospace, automobiles, sports equipment, instruments and other fields due to its excellent electrical and thermal conductivity, high strength, high modulus, friction resistance, and corrosion resistance. Carbon fiber and its composite materials are widely used in all walks of life, filling key and common technical problems that other materials cannot solve. [0005] Although carbon fiber has superior properties in the transverse direction. However, it has poor longitudinal properties, such as: it is more brittle than traditional fibers, it is easy to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M15/55D06M15/263D06M15/09D06M15/356D06M13/256C01B32/184C01B32/168D06M101/40
CPCD06M11/74D06M13/256D06M15/09D06M15/263D06M15/3562D06M15/55D06M2101/40
Inventor 汪训国
Owner HANGZHOU CHAOTAN NEW MATERIAL TECH
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