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Method for preparing graphene-carbon nano tube composite material

A carbon nanotube and composite material technology, applied in the field of graphene-carbon nanotube composite material preparation, can solve the problems of complex process and high cost

Inactive Publication Date: 2012-07-04
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the traditional methods for preparing graphene-carbon nanotube composites are complex, costly, and use toxic reagents such as hydrazine hydrate to reduce graphene.

Method used

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  • Method for preparing graphene-carbon nano tube composite material
  • Method for preparing graphene-carbon nano tube composite material
  • Method for preparing graphene-carbon nano tube composite material

Examples

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preparation example Construction

[0030] see figure 1 , the preparation method of the graphene-carbon nanotube composite material of an embodiment comprises the steps:

[0031] Step S110, providing or preparing graphite oxide and acid-treated carbon nanotubes.

[0032] Graphite oxide can be prepared by conventional methods. Preferably, the improved Hummers method can be used to prepare:

[0033] (a), graphite, potassium persulfate and phosphorus pentoxide are added in the concentrated sulfuric acid of 80~120 ℃ according to mass ratio 2~10:1:1, after stirring evenly, cool naturally, wash to neutrality and then dry, obtain pre-oxidized graphene. The graphite is preferably flake graphite.

[0034] (b) Slowly add the pre-oxidized graphite into concentrated sulfuric acid, keep the temperature of the mixed solution below 20°C and slowly add potassium permanganate, then put it in an oil bath at 25-35°C for 1-3 hours, add Ionized water, control the temperature below 98°C, keep it for 15 minutes, then add deionize...

Embodiment 1

[0052] (1) Provide natural flake graphite with a purity of 99.5%.

[0053] (2) Graphite oxide was prepared by the improved Hummers method. The specific steps are adding 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stirring evenly, cooling for more than 6h, washing until neutral, and drying. Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water , control the temperature below 98°C, keep it for 15 minutes, then add 2.8L of deionized water (which contains 50mL of 30% hydrogen peroxide), then the color of the mixture turns bright yellow, suction filter while it is hot, and then use 5L of 10% hydrogen peroxide % hydrochloric acid for washing, suction filtration, and vacuum drying at 60°C for 48 hours to obtain ...

Embodiment 2

[0058] (1) Provide natural flake graphite with a purity of 99.5%.

[0059] (2) Graphite oxide was prepared by the improved Hummers method. The specific steps are adding 20g of 50 mesh graphite powder, 10g of potassium persulfate and 10g of phosphorus pentoxide into concentrated sulfuric acid at 80°C, stirring evenly, cooling for more than 6h, washing until neutral, and drying. Add the dried sample to 230mL of concentrated sulfuric acid at 0°C, then add 60g of potassium permanganate, keep the temperature of the mixture below 20°C, then keep it in an oil bath at 35°C for 2h, then slowly add 920mL of deionized water , control the temperature below 98°C, keep it for 15 minutes, then add 2.8L of deionized water (which contains 50mL of 30% hydrogen peroxide), then the color of the mixture turns bright yellow, suction filter while it is hot, and then use 5L of 10% hydrogen peroxide % hydrochloric acid for washing, suction filtration, and vacuum drying at 60° C. for 48 hours to obtai...

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Abstract

The invention discloses a method for preparing a graphene-carbon nano tube composite material. The method comprises the following steps of: 1, adding graphite oxide and carbon nano tubes treated by using acid into water, performing ultrasonic oscillation, and stirring to obtain a uniformly dispersed mixed solution; and 2, filtering the mixed solution, drying the solid, heating the dried solid to the temperature of between 1,000 and 1,200 DEG C at the velocity of 10 DEG C per minute under an inert gas environment, preserving the heat for 10 to 30 minutes, cooling to room temperature, and thus obtaining the graphene-carbon nano tube composite material. The method has the advantages of simple process and low cost.

Description

【Technical field】 [0001] The invention relates to a nano-carbon composite material, in particular to a preparation method of a graphene-carbon nanotube composite material. 【Background technique】 [0002] Andre K. Geim (Andre K.Geim) of the University of Manchester in the United Kingdom prepared graphene materials in 2004, and it has received widespread attention due to its unique structure and photoelectric properties. Single-layer graphite is considered an ideal material due to its large specific surface area, excellent electrical and thermal conductivity, and low thermal expansion coefficient. Such as: 1, high strength, Young's molar weight, (1,100GPa), breaking strength: (125GPa); 2, high thermal conductivity, (5,000W / mK); 3, high electrical conductivity, carrier transport rate, ( 200,000cm 2 / V*s); 4, high specific surface area, (theoretical calculation value: 2,630m 2 / g). In particular, its high conductivity, large specific surface properties and its two-dimensiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04B82Y40/00B82Y30/00C01B32/168C01B32/192
Inventor 周明杰吴凤王要兵
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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