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Carbon nanotube cotton and preparation method thereof

A technology of carbon nanotubes and multi-walled carbon nanotubes, which is applied in the synthesis and application of carbon nanomaterials, can solve problems such as numerous steps, difficulty in obtaining macroscopic bulk samples, and constraints on the wide application of carbon nanotubes to achieve cyclic compression performance Good, low density, low thermal conductivity effect

Active Publication Date: 2009-12-23
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although carbon nanotubes have excellent performance, the currently prepared carbon nanotubes are powdery, filamentous or filmy samples, and it is difficult to obtain macroscopic bulk samples, which greatly restricts the wide application of carbon nanotubes.
[0003] As early as 1991, Iijima (Helical microtubules of graphitic carbon, Nature, 1991, 354: 56-58) first reported the synthesis of carbon nanotubes, but at that time it was only on the micron scale, and the synthesis on the microscopic scale could not be mass-produced and widely used
In 2002, Zhu Hongwei et al. (Direct synthesis of long single-walled carbon nanotubestrands, Science, 2002, 296:884-886) reported the synthesis of single-walled carbon nanotube macroscopic bodies, which greatly promoted the application of carbon nanotubes, but its The synthesis can only be a filamentous one-dimensional macroscopic body
However, this method has many steps, and the carbon nanotubes need to be acid boiled, gel polymerized, pressed, baked, etc. to obtain them, and the compression cycle performance of the carbon nanotube foam is poor.

Method used

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  • Carbon nanotube cotton and preparation method thereof
  • Carbon nanotube cotton and preparation method thereof
  • Carbon nanotube cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 6g of ferrocene powder and dissolve it in 100mL of dichlorobenzene solution. After the ferrocene is fully dissolved, a brownish yellow solution is formed to obtain a ferrocene / dichlorobenzene carbon source solution with a concentration of 60mg / mL for future use. Put the quartz substrate into the quartz reaction chamber of the reaction furnace, and seal the reaction chamber. Introduce argon gas with a flow rate of 1000mL / min into the reaction chamber to exhaust the air in the reaction chamber, while heating the reaction furnace. When the temperature of the reaction chamber reaches 860° C., adjust the flow rate of argon to 2000 mL / min, and at the same time, feed hydrogen at a flow rate of 300 mL / min. Inject the carbon source solution into the reaction chamber with a precision syringe pump at a rate of 0.13 mL / min. After reacting for 4 hours, turn off the hydrogen, adjust the flow of argon to 50 mL / min, and let the product cool down to room temperature with the furn...

Embodiment 2

[0034] Weigh 6g of ferrocene powder and dissolve it in 100mL of dichlorobenzene solution. After the ferrocene is fully dissolved, a brownish yellow solution is formed to obtain a ferrocene / dichlorobenzene carbon source solution with a concentration of 60mg / mL for future use. Put the quartz substrate into the quartz reaction chamber of the reaction furnace, and seal the reaction chamber. Introduce argon gas with a flow rate of 1000mL / min into the reaction chamber to exhaust the air in the reaction chamber while heating the reaction furnace. When the temperature of the reaction chamber reaches 860° C., adjust the flow rate of argon to 2000 mL / min, and at the same time, feed hydrogen at a flow rate of 500 mL / min. Inject the carbon source solution into the reaction chamber with a precision syringe pump at a rate of 0.13 mL / min. After reacting for 4 hours, turn off the hydrogen, adjust the flow of argon to 50 mL / min, and let the product cool down to room temperature with the furna...

Embodiment 3

[0037] Weigh 6g of ferrocene powder and dissolve it in 100mL of dichlorobenzene solution. After the ferrocene is fully dissolved, a brownish yellow solution is formed to obtain a ferrocene / dichlorobenzene carbon source solution with a concentration of 60mg / mL for future use. Put the quartz substrate into the quartz reaction chamber of the reaction furnace, and seal the reaction chamber. Introduce argon gas with a flow rate of 1000mL / min into the reaction chamber to exhaust the air in the reaction chamber while heating the reaction furnace. When the temperature of the reaction chamber reaches 860° C., adjust the flow rate of argon to 2000 mL / min, and at the same time, feed hydrogen at a flow rate of 300 mL / min. Use a precision syringe pump to inject the carbon source solution into the reaction chamber at a rate of 0.25 mL / min; after 4 hours of reaction, turn off the hydrogen, adjust the argon flow to 50 mL / min, and let the product cool down to room temperature with the furnace....

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Abstract

The invention discloses a carbon nanotube cotton and a preparation method thereof, belonging to the technical field of synthesis and application of carbon nanomaterials. The carbon nanotube cotton in the invention is a macro-body material with a disorderly network-like porous structure, and the carbon nanotube cotton is formed by mutually winding and lapping a plurality of carbon nanotubes. The carbon nanotube cotton has the advantages of super-low density, super-hydrophobicity, good absorption, good cycle compressibility, good shape memory function and good thermal insulation. The carbon nanotube cotton can be used as the material for energy absorption, shock absorption, thermal insulation, sound absorption, toxic organic solvent absorption, oil-water separation, filtration and the like. The carbon nanotube cotton is directly produced by the catalytic cracking method, dichlorobenzene is taken as a carbon source, and ferrocene is taken as a catalyst. The preparation method has simple process and simple operation and is applicable to mass production.

Description

technical field [0001] The invention relates to a carbon nanotube cotton and a preparation method thereof, belonging to the field of synthesis and application of carbon nanomaterials. Background technique [0002] As a new type of nanomaterial, carbon nanotubes have special properties due to their unique structure. Carbon nanotubes have excellent mechanical, thermal, adsorption and other properties, which make them show broad application prospects as high-performance functional materials and structural reinforcement materials. more and more attention and attention. Although carbon nanotubes have excellent properties, the currently prepared carbon nanotubes are powdery, filamentary or film-like samples, and it is difficult to obtain macroscopic bulk samples, which greatly restricts the wide application of carbon nanotubes. [0003] As early as 1991, Iijima (Helical microtubules of graphitic carbon, Nature, 1991, 354: 56-58) first reported the synthesis of carbon nanotubes, ...

Claims

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Application Information

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IPC IPC(8): C01B31/00C01B31/02
Inventor 桂许春韦进全王昆林曹安源朱宏伟吴德海
Owner TSINGHUA UNIV
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