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Method for preparing graphene-carbon nano tube hybrid composite

A technology of carbon nanotubes and composite materials, applied in nanostructure manufacturing, nanotechnology, nanotechnology, etc., to achieve excellent electrical properties, high stiffness, and low cost

Inactive Publication Date: 2010-06-16
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above methods, there is no mention of the use of graphene and carbon nanotube hybrid technology to form entangled interwoven networks, and spin coating technology is often used to form composite films in the preparation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Disperse 0.01 g of graphene and 0.01 g of carbon nanotubes in 10 g of absolute ethanol, and form a stable suspension after ultrasonication for 2 hours; add 10 g of high-density polyethylene ultrafine powder to the suspension, and ultrasonicate for 30 minutes , when the graphene-carbon nanotubes are wrapped on the surface of the high-density polyethylene powder and a uniform mixed system is formed, the temperature is raised to 60°C for drying to remove the solvent. Transfer it to a mold, raise the temperature to 170° C., and hot press for 5 minutes under the condition of 10 MPa, cool to room temperature, and demould to obtain a graphene-carbon nanotube hybrid composite material. Measure the volume resistance of the composite material and calculate its resistivity to be 7.09×10 6 ohm cm.

Embodiment 2

[0031] Disperse 0.1 g of graphene and 0.1 g of carbon nanotubes in 10 g of acetone, and form a stable suspension after ultrasonication for 2 hours; add 10 g of polypropylene particles to the suspension, and ultrasonicate for 30 minutes, and the graphene-carbon When nanotubes are wrapped on the surface of high-density polypropylene particles to form a uniform mixed system, the solvent is removed by vacuum filtration at room temperature. Transfer it to a mold, raise the temperature to 200°C, and hot press for 5 minutes under the condition of 10MPa, cool to room temperature and release the mold to obtain a graphene-carbon nanotube hybrid composite material. Measure the volume resistance of the composite material and calculate its resistivity as 2.00×10 4 ohm cm.

Embodiment 3

[0033] Disperse 0.5 g of graphene and 0.5 g of carbon nanotubes in 25 g of absolute ethanol, and form a stable suspension after ultrasonication for 2 hours; add 10 g of polymethyl methacrylate particles to the suspension, and ultrasonicate for 30 minutes , when the graphene-carbon nanotubes are wrapped on the surface of polymethyl methacrylate particles and form a uniform mixed system, vacuum filtration is performed at room temperature to remove the solvent. Transfer it to a mold, raise the temperature to 180°C, and hot press for 5 minutes under the condition of 10MPa, cool to room temperature and release the mold to obtain a graphene-carbon nanotube hybrid composite material. Measure the volume resistance of the composite material and calculate its resistivity to be 8.84×10 2 ohm cm.

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Abstract

The invention provides a method for preparing a graphene-carbon nano tube hybrid composite and relates to a method for preparing a functional high molecular material and a device thereof. The method comprises the following steps of: carrying out the stirring and sonic oscillation treatment on graphene and carbon nano tubes to preform an entangled network structure, thoroughly mixing the entangled network structure and polymer particles, and thus obtaining an uniformly-mixed system in which the graphene-carbon nano tube network is coated on the surfaces of the polymer particles after removing the solvent; and putting the uniformly-mixed system in a mould, hot-compacting, and obtaining the graphene-carbon nano tube hybrid composite after cooling and demoulding. By mingling the graphene and the carbon nano tubes in advance to form the communicated network structure, the method realizes the advantage complementation of the graphene and carbon nano tube structures and enables the hybrid composite to have favorable electric conduction and heat conduction properties. The method can be widely used in the fields such as aviation, transportation and communication, electronic industry, civil facilities, construction, chemical industry and the like, can be produced in the industrial scale, and has the advantages of low cost and environmental friendliness.

Description

technical field [0001] The invention relates to a preparation method in the technical field of functional polymer materials and devices, in particular to a preparation method of a graphene-carbon nanotube hybrid composite material. Background technique [0002] Graphene (graphene, see: Novoselov K S, et al. Electric field effects inatomically thin carbon films. Science, 2004, 306: 666-119) is a kind of two-dimensional honeycomb lattice structure formed by a single layer of carbon atoms tightly packed. A new carbonaceous material, which is the basic unit for constructing other dimensional carbonaceous materials (such as zero-dimensional fullerenes, one-dimensional carbon nanotubes, and three-dimensional graphite). Graphene has excellent electrical and thermal properties, and its electron mobility at room temperature can reach 15,000 cm 2 V -1 S -1 , thermal conductivity up to 3000Wm -1 K -1 ; In addition, graphene is cheap and easy to obtain raw materials, and its unique...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82B3/00
Inventor 曾尤赵龙杜金红刘鹏飞佟钰赵金波
Owner SHENYANG JIANZHU UNIVERSITY
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