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Three-dimensional nano-carbon material for composite strengthening, and preparation method thereof

A nano-carbon material, three-dimensional nano technology, applied in the direction of nanotechnology, can solve the problems of insufficient strength, limited number of functional groups of carbon nanotubes, obstacles, etc., and achieve the effect of increasing lifespan

Active Publication Date: 2011-10-19
江苏中天碳基材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This characteristic has led to a relatively large obstacle when carbon nanotubes are used as conductive enhancement materials.
And even if it is not subjected to a high temperature environment, the number of functional groups on the surface of carbon nanotubes is still limited, and their strength when combined with the polymer is not strong enough. When the composite material is stretched or bent, the carbon nanotubes will still slide out.

Method used

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  • Three-dimensional nano-carbon material for composite strengthening, and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] Dissolve polyethylene in xylene to form a solution with a concentration of 0.001Mol / L; ultrasonically disperse carbon nanotubes with a diameter of 0.8-3nm in xylene to form a solution with a concentration of 0.001Mol / L. The above two solutions were mixed and stirred at 130° C. for 3 hours to gradually precipitate polyethylene crystals on the surface of the carbon nanotubes; stop stirring and let the above solution stand for 3 hours to allow the carbon nanotubes deposited with polyethylene crystals to settle. The settled solid matter was taken out, transferred to ethanol solution at 20°C, and the polymer crystals were further solidified, then taken out, and washed three times with ethanol at 20°C. Then vacuum dry at -25°C for 24 hours.

[0026] The above-mentioned carbon nanotube-polyethylene string crystal structure is treated with 1Mol / L sulfuric acid at 120° C. for 3 hours, neutralized and washed, and then dried to generate a three-dimensional nano-carbon material.

...

Embodiment 2

[0029] Dissolve polyethylene in xylene to form a solution with a concentration of 0.02Mol / L; ultrasonically disperse carbon nanotubes with a diameter of 8-30nm in xylene to form a solution with a concentration of 0.04Mol / L. The above two solutions were mixed and stirred at 130° C. for 5 hours to gradually precipitate polyethylene crystals on the surface of the carbon nanotubes; stop stirring and let the above solution stand for 5 hours to allow the carbon nanotubes deposited with polyethylene crystals to settle. The settled solid matter was taken out, transferred to ethanol solution at 25°C, and further polymer crystals were solidified, then taken out, and washed with ethanol at 25°C for 5 times. Then vacuum dry at -25°C for 5 hours.

[0030] The above-mentioned carbon nanotube-polyethylene string crystal structure was treated with 0.2Mol / L nitric-sulfur mixed acid at 50°C for 15 hours, neutralized and washed, and then dried to generate a three-dimensional nano-carbon material...

Embodiment 3

[0033]Dissolve nylon in glycerin to form a solution with a concentration of 0.05Mol / L; ultrasonically disperse carbon nanotubes with a diameter of 30-100nm in glycerin to form a solution with a concentration of 0.1Mol / L. The above two solutions were mixed and stirred at 172° C. for 5 hours to make the nylon crystallize gradually on the surface of the carbon nanotubes; the stirring was stopped, and the above solution was left to stand for 3 hours to allow the carbon nanotubes deposited with nylon crystals to settle. The settled solid matter was taken out, transferred to ethanol solution at 40°C, and the polymer crystals were further solidified, then taken out, and washed with ethanol at 20°C for 5 times. Then vacuum dry at -25°C for 15 hours.

[0034] The above-mentioned carbon nanotube-nylon string crystal structure was treated with 1Mol / L nitric acid at 80° C. for 10 hours, neutralized and washed, and then dried to generate a three-dimensional nano-carbon material.

[0035] ...

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Abstract

The invention discloses a three-dimensional nano-carbon material for composite strengthening, and a preparation method thereof, and belongs to the technical field of nano-material preparation. The three-dimensional nano-carbon material comprises carbon nano-tubes and nano-carbon plates combined on the same or nano-carbon spheres combined on the same. The preparation method for the three-dimensional nano-carbon material is characterized by: coating nanometer macromolecule shish-kebab on surfaces of the carbon nano-tubes, followed by carrying out carbonizing through a high temperature treatmentor a acid treatment; or depositing metal particles on the surfaces of the carbon nano-tubes, followed by decomposing hydrocarbons and depositing carbons to coat the metal particles, finally removing the metal particles through high-temperature vacuum evaporation, and carrying out high-temperature shaping for the nano-carbon spheres. When being combined with the polymers, ceramic, metals and carbon-carbon materials, the three-dimensional nano-carbon material provided by the present invention has good dispersity, large contact surface area and strong interface combination so as to greatly improve intensity or flexibility of the main materials, and improve stability and service life of the products in battery applications and capacitor applications.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a three-dimensional nanocarbon material for composite reinforcement and a preparation method thereof. Background technique [0002] Carbon nanotubes are tubular seamless materials produced by curling graphite sheets, with a diameter of usually 0.6-100 nanometers and a length of tens of centimeters. Because the diameter is very small and the length is very long, carbon nanotubes are typical representatives of one-dimensional linear nanomaterials. It has excellent electrical conductivity, extremely high mechanical strength and huge aspect ratio and specific surface area. Therefore, it is widely used in the composite conductivity enhancement of polymers, metals and ceramics or carbon materials, and is also widely used as a catalyst carrier. [0003] Since carbon nanotubes are made of SP 2 The hybridized carbon atoms are seamlessly combined, so the tub...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/02B82Y40/00
Inventor 骞伟中崔超婕魏飞
Owner 江苏中天碳基材料有限公司
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