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Ultra-short carbon nanotube-graphene composite material and preparation method and application thereof

A carbon nanotube and composite material technology, applied in the direction of carbon nanotubes, multi-walled carbon nanotubes, graphene, etc., can solve the problem that the performance is difficult to maintain for a long time, the structural stability of composite materials is poor, and graphene and carbon nanotubes are easy to fall off and separate. and other issues to achieve the effect of enhancing the interaction force and maintaining long-term stability

Pending Publication Date: 2021-01-12
GUANGDONG UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, due to the high aspect ratio of carbon nanotubes, the distance between graphene sheets is too large, which makes graphene and carbon nanotubes easy to fall off and separate, and the structural stability of the composite material is poor, and the performance is difficult to maintain for a long time.
Therefore, the application of carbon nanotube-graphene composites is still limited

Method used

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  • Ultra-short carbon nanotube-graphene composite material and preparation method and application thereof
  • Ultra-short carbon nanotube-graphene composite material and preparation method and application thereof
  • Ultra-short carbon nanotube-graphene composite material and preparation method and application thereof

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Embodiment 1

[0036] Step S1, measure 50mL of the ultra-short carbon nanotube dispersion prepared above and 25mL of the graphene oxide dispersion (volume ratio is 1:0.5), put them into two beakers respectively, and conduct them under ice bath conditions Ultrasonic dispersion for 60 minutes; then keep the ice bath condition ultrasonic, slowly drop the ultrashort carbon nanotube dispersion into the graphene oxide dispersion. material solution.

[0037] Step S2, adding a certain amount of NaOH to the ultrashort carbon nanotube-redox graphene composite solution in step S1 to adjust the pH value to 9, and then adding 1g NaBH 4 Stir to disperse evenly, and then conduct a controlled reduction reaction at 60°C for 1.5 hours under the protection of nitrogen. After the product is washed with deionized water for many times and filtered with PTFE, it is vacuum-dried at room temperature for 48 hours to obtain ultra-short carbon nanotubes- Graphene composites.

[0038] The ultrashort carbon nanotube-gr...

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Abstract

The invention belongs to the field of preparation of carbon nanotube-graphene composite materials, and discloses an ultra-short carbon nanotube-graphene composite material and a preparation method andapplication thereof. The preparation method comprises the following steps: S1, carrying out a liquid phase self-assembly method on an ultra-short carbon nanotube with the length of 310-600nm and graphene oxide to obtain a water-soluble ultra-short carbon nanotube-graphene oxide dispersion liquid; and S2, adding a reducing agent sodium borohydride in the step S1, and preparing the water-soluble ultra-short carbon nanotube-graphene composite material under the conditions that the reaction temperature is 60-90 DEG C and the time is 30-120 minutes. The method is simple in process, can be used forpreparing the relatively uniform ultra-short carbon nanotube-graphenecomposite material, and can be applied to the fields of electronic equipment heat management and heat energy storage.

Description

technical field [0001] The invention relates to the field of composite carbon materials, and more specifically, to an ultrashort carbon nanotube-graphene composite material and its preparation method and application. Background technique [0002] Carbon nanotubes are coaxial circular tubes consisting of several to tens of layers of carbon atoms arranged in a hexagonal shape. A fixed distance is maintained between the layers, about 0.34nm, the diameter is generally 2 to 20nm, and the length is between microns. Grade, with excellent properties such as high surface area, high electrical conductivity and thermal conductivity. [0003] Graphene is made of carbon atoms with sp 2 The monoatomic layer with a honeycomb structure formed by the hybrid connection is currently the thinnest two-dimensional material in the world, with a thickness of only 0.34nm. It has excellent mechanical properties, as well as high surface area, high electrical conductivity, high flexibility and thermal...

Claims

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Application Information

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IPC IPC(8): C01B32/168C01B32/184C01B32/159
CPCC01B32/168C01B32/184C01B32/159C01B2202/06C01B2202/36C01B2202/34
Inventor 罗文刘家兴全小倩黄金
Owner GUANGDONG UNIV OF TECH
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