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Preparation device and method for preparing carbon nanotube graphene composite fiber from multiple tubes

A graphene composite, carbon nanotube technology, applied in the direction of inorganic raw material artificial filaments, etc., can solve the limitation of carbon nanotube fiber wide application, low yield, carbon nanotube graphene composite fiber mechanical, electrical and other comprehensive properties can not be satisfied. requirements, etc.

Active Publication Date: 2020-07-07
深圳前海量子翼纳米碳科技有限公司
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  • Application Information

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Problems solved by technology

But, the contriver finds through research, there is following problem urgently to be solved in above-mentioned preparation technique: (1) composite graphene on the single carbon nanotube fiber that has formed and form the preparation process of single carbon nanotube graphene composite fiber, Since the carbon nanotube fibers have been formed, when graphene is recombined, it is difficult for graphene to enter the network structure of carbon nanotubes, but can only be coated on the outermost surface of the formed carbon nanotube fibers. The formed composite fiber belongs to the core-shell structure, and cannot exert the synergistic effect of both carbon nanotubes and graphene materials; (2) For the first method of adjusting the diameter of the composite fiber, that is, multiple formed single carbon nanotube graphene The composite fiber is gathered into a relatively thick composite fiber by twisting and plying. Although it can meet the demand in diameter, this twisting and plying method is to make a plurality of carbon nanotubes graphite through pure mechanical force. The carbon nanotube graphene composite fiber is gathered into a thick fiber, and the bonding force between each carbon nanotube graphene composite fiber in the thick fiber is weak, so the integrity of the thick fiber is not strong, and its mechanics (such as tensile strength), electrical Performance, etc., not as good as single carbon nanotube graphene composite fiber
Therefore, the mechanical, electrical and other comprehensive properties of the finally obtained carbon nanotube graphene composite fibers cannot meet the requirements; (2) For the second way of adjusting the diameter of the composite fiber, that is, by increasing the diameter of the reaction tube to increase Due to the limitation of the chemical catalytic reaction conditions and other factors, the diameter of a single carbon nanotube fiber can only be adjusted within a small range, so the diameter of a single carbon nanotube can be adjusted The diameter of nanotube fibers is limited and can only be fine-tuned; in addition, the yield of a single carbon nanotube fiber prepared by a single reaction tube is low, and the increase in the diameter of the reaction tube is related to the yield of carbon nanotube fibers ( That is, the growth of the amount of a single carbon nanotube fiber prepared per unit time) is not directly proportional, that is, the increase in the yield of carbon nanotubes is not significantly affected by increasing the diameter of the reaction tube. Therefore, a single The yield of carbon nanotube fibers prepared by reaction tubes is low, which greatly limits the wide application of carbon nanotube fibers and cannot meet the needs of large-scale industrial production

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  • Preparation device and method for preparing carbon nanotube graphene composite fiber from multiple tubes
  • Preparation device and method for preparing carbon nanotube graphene composite fiber from multiple tubes
  • Preparation device and method for preparing carbon nanotube graphene composite fiber from multiple tubes

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Embodiment 1

[0049] A preparation device for preparing carbon nanotube graphene composite fibers from multiple tubes, such as figure 1 and Figure 4 As shown, it includes a casing 1, a plurality of reaction tubes 2 for synthesizing carbon nanotube aggregates 8 fixed in the casing 1, a holding tank 3 containing a graphene dispersion, a guide wheel assembly, and a Assembly 6 of holes 61 and twist winding device 7, wherein:

[0050] The holding tank 3 is located below the outlet end of the reaction tube 2, and the outlet ends of the reaction tube 2 are all perpendicular to the liquid surface of the graphene dispersion. The guide wheel assembly is fixed on the holding tank 3, the guide wheel assembly includes an upper guide wheel 4 and a lower guide wheel 5, the upper guide wheel 4 is located below the liquid level of the graphene dispersion, and the lower guide wheel 5 is located at the liquid level of the graphene dispersion above. Actually, the number of required reaction tubes 2 can be ...

Embodiment 3

[0069] The preparation method of multi-tube carbon nanotube graphene composite fiber, the main technical scheme of this embodiment is the same as that of embodiment 2, the difference is:

[0070] In step a, the carbon source is ethanol, and catalyst and accelerator are dissolved in ethanol, and the content of catalyst accounts for 2% of the total mass of reactants, and the accelerator accounts for 3% of the total mass of reactants. The catalyst is nickelocene, and the accelerator is Thiophene, the carrier gas is a mixed gas of hydrogen and helium, wherein the hydrogen volume percentage is 30%; the gas flow rate of the carrier gas is 5L / min.

[0071] In step b, the graphene dispersion liquid is made of graphene powder and a dispersant through ultrasonic dispersion, and the dispersant is a mixture of DMF and deionized water according to a volume ratio of 1:2; in the graphene dispersion liquid, the concentration of graphene is 2mg / ml.

Embodiment 4

[0073] The preparation method of multi-tube carbon nanotube graphene composite fiber, the main technical scheme of this embodiment is the same as that of embodiment 2, the difference is:

[0074] In step a, the carbon source is isopropanol, catalyst and accelerator are dissolved in isopropanol, the content of catalyst accounts for 3% of the total mass of reactants, the accelerator accounts for 1% of the total mass of reactants, and the catalyst is ferrocene , the accelerator is sulfur element, the carrier gas is helium, and the gas flow rate of the carrier gas is 8L / min.

[0075] The reactant also includes an auxiliary agent, which accounts for 1% of the total mass of the reactant. Specifically, the auxiliary agent is a heteroatom precursor.

[0076] In step b, the graphene dispersion is prepared by ultrasonic dispersion of graphene powder and a dispersant, the dispersant is DMF, and the concentration of graphene in the graphene dispersion is 4 mg / ml.

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Abstract

The invention relates to the technical field of carbon nano tube composite materials, in particular to a preparation device and a preparation method for multitubular preparation of carbon nano tube graphene composite fibers. The preparation device comprises multiple reaction tubes, an accommodating slot filled with graphene dispersion liquid, a guiding wheel component, a component with a through hole and a twisting and winding device. Compared with the prior art, the preparation device provided by the invention has the advantages that carbon nano tube aggregates prepared by the reaction tubesenter the graphene dispersion liquid to be fully infiltrated and mutually combined before being moulded into fibers, and the carbon nano tube aggregates are shrunk and moulded into a single carbon nano tube composite fiber at the same time, so that a binding force between the carbon nano tubes and graphene is stronger through in situ compounding, synergistic effect of the carbon nano tubes and graphene can be played, and integral mechanical and electric properties of the finally obtained composite fiber are synergistically enhanced.

Description

technical field [0001] The invention relates to the technical field of carbon nanotube composite materials, in particular to a preparation device and a preparation method for preparing carbon nanotube graphene composite fibers from multiple tubes. Background technique [0002] As a one-dimensional nanomaterial, carbon nanotubes are light in weight, perfectly connected in a hexagonal structure, and have many excellent mechanical, electrical and chemical properties. As a two-dimensional carbon nanomaterial with only a single atomic layer thickness, graphene has extremely high carrier mobility, good light transmission and electrical conductivity, good semiconductivity, and high specific surface area. Nanoelectronic devices, electrode materials and other fields have broad application prospects. With the development of science and technology, research on composite fibers of graphene and carbon nanotubes has become more and more in-depth. The purpose is to give full play to the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08
CPCD01F9/08
Inventor 童潇葛爱雄廖太明
Owner 深圳前海量子翼纳米碳科技有限公司