Method for synthesizing continuous carbon nanometer tube film

A carbon nanotube thin film and carbon source technology, applied in the field of carbon nanomaterial synthesis, can solve the problems of potential safety hazards, unfavorable large-scale collection of carbon nanotubes, inability to synthesize continuous carbon nanotube filaments and large-scale production, etc. good effect

Inactive Publication Date: 2010-09-15
BEIHANG UNIV
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Problems solved by technology

Wu Dehai's research group at Tsinghua University successfully directly synthesized single-walled carbon nanotube filaments with a length of 40 cm by vertical floating catalytic cracking method, but this method cannot synthesize continuous carbon nanotube filaments and scale production
In addition, the A.H.Windle research group of the University of Cambridge (Science, Vol 304, 276-278, 2004) and the Li Yali research group of Tianjin University (Advanced Materials, Vol22, 692-696, 2010) used the chemical vapor deposition method from the vertical reaction furnace Continuous carbon nanotube filaments are spun in China, but because of the vertical reaction furnace and pure hydrogen as the carrier gas, there are certain safety hazards, which are not conducive to large-scale production of carbon nanotube fibers
[0004] The existing technology for preparing continuous carbon nanotube filaments all adopts catalytic cracking method and vertical reaction furnace. The main disadvantages and deficiencies are: (1) the carrier gas is pure hydrogen, which has potential safety hazards such as industrial production; (2) vertical reaction Furnaces not conducive to large-scale collection of carbon nanotubes

Method used

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  • Method for synthesizing continuous carbon nanometer tube film
  • Method for synthesizing continuous carbon nanometer tube film
  • Method for synthesizing continuous carbon nanometer tube film

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Weigh 0.026g of ferrocene, dissolve it in 12.87g of toluene solution, add 0.1g of thiophene dropwise, and then ultrasonically disperse the mixed solution for 5min to obtain a yellow transparent reaction solution.

[0032] (2) The temperature of the horizontal reactor is raised to 1000 DEG C at a speed of 10 DEG C / min, and the reaction solution is injected into the airflow of 50 ml / min argon as the carrier gas 2 at a speed of 15 ml / h. , the carbon nanotube film flows out with the airflow, and the rotating shaft 9 at the end of the quartz tube 6 is rotated to obtain the carbon nanotube film.

[0033] figure 2 It is a continuously spun carbon nanotube film with a length of about 15cm, a thickness of about 100μm, and a reaction time of 20min.

Embodiment 2

[0035] (1) Weigh 0.78g ferrocene, dissolve it in 11.7g ethanol solution, and add 0.52g thiophene dropwise. Then the mixed solution was ultrasonically dispersed for 5 min to obtain a yellow transparent reaction solution.

[0036] (2) The temperature of the horizontal reactor is raised to 1100°C at a speed of 10°C / min, and the reaction solution is injected into a mixture of 550ml / min hydrogen and argon at a speed of 15ml / h (H 2 : Ar=5:1) in the carrier gas flow 2, in the high-temperature reaction furnace, the carbon nanotube film flows out with the air flow, and the rotating shaft 9 at the end of the quartz tube 6 is rotated to obtain the carbon nanotube film.

Embodiment 3

[0038] (1) Weigh 0.4g of ferrocene, dissolve it in 12.5g of xylene solution, and add 0.26g of thiophene dropwise. Then the mixed solution was ultrasonically dispersed for 5 min to obtain a yellow transparent reaction solution.

[0039] 2) The temperature of the horizontal reactor is raised to 1150°C at a rate of 10°C / min, and the reaction solution is injected into a mixture of 1000ml / min hydrogen and argon at a rate of 15ml / h (H 2 : Ar=10:1) in the carrier gas flow 2, in the high-temperature reaction furnace, the carbon nanotube film flows out with the air flow, and the rotating shaft 9 at the end of the quartz tube 6 is rotated to obtain the carbon nanotube film.

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Abstract

The invention relates to a technical method for synthesizing continuous carbon nanometer tube film, which comprises the following step of: with glycol, ethanol, acetone, hexane, benzene, toluene or xylene as a carbon source, ferrocene as catalyst, sulphur and thiophene as accelerators and with hydrogen, argon gas, nitrogen, helium or the mixed gas of hydrogen and inert gas as carrier gas, preparing a continuous carbon nanometer tube film at flow rate of carrier gas from 50 to 6000 ml/mi at temperature of 1000 to 1300 DEG C by use of a horizontal reaction furnace device, wherein the carbon nanometer tube mainly consists of a single-wall carbon nanometer tube and a double-wall carbon nanometer tube. The invention has the advantages that carbon nanometer tubes can be continuously synthesized, and scale production of carbon nanometer tubes is facilitated.

Description

technical field [0001] The invention relates to a production process for synthesizing a continuous carbon nanotube film, belonging to the field of carbon nanomaterial synthesis. Background technique [0002] Carbon nanotube (Carbon Nanotube, CNT) is a seamless one-dimensional nanomaterial formed by curling single-layer or multi-layer graphite sheet according to a certain helical angle. This unique geometric structure and electronic band structure make it have ultra-high mechanical, electrical and thermal properties. The tensile strength of the multi-walled carbon nanotubes is measured to be over 100GPa, the Young's modulus reaches 1.0TPa, and the maximum elongation is 10-12%. In addition, the conductivity of carbon nanotubes is as high as 10 5 Scm -1 , 1000 times that of carbon fiber. The thermal conductivity of carbon nanotubes is as high as 3000Wm -1 K -1 , making it an excellent thermal conductor. The thermal stability of carbon nanotubes in air (basically not oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 程群峰江雷
Owner BEIHANG UNIV
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