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Method and device for preparing carbon nanotube film

A technology of carbon nanotube film and nanotube film, which is applied in the field of nanomaterials, can solve the problems of affecting the structure of carbon nanotubes, cumbersomeness, and limiting the efficiency of transparent conductive carbon nanotube films, and achieve the effect of simple reaction equipment and high preparation efficiency

Inactive Publication Date: 2010-03-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation of transparent conductive carbon nanotube film usually adopts the film-forming method of dispersed carbon nanotube solution, which involves physical and chemical treatments such as purification and dispersion. These processes are not only cumbersome, but also easily affect the structure of carbon nanotubes, introduce impurities and defects, and reduce carbon Nanotube properties
On the other hand, the dispersibility of carbon nanotubes in solution is limited, which also limits the efficiency of preparing transparent conductive carbon nanotube films.

Method used

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  • Method and device for preparing carbon nanotube film
  • Method and device for preparing carbon nanotube film
  • Method and device for preparing carbon nanotube film

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Using ethanol as carbon source and ferrocene as catalyst. Ferrocene was added to ethanol at a mass percentage of 2%. Using thiophene as a growth promoter, it was added to the solution at a mass percentage of 2%. The reactor was evacuated, 1000 ml of hydrogen per minute was introduced, and the temperature was raised to 1100 degrees. Inject the prepared solution into the reactor at a rate of 10.0 ml per hour, spin on the shaft, and spin for 1 hour. figure 2 . The continuous carbon nanofiber membrane can be detached from the spinning shaft, and the morphology is as follows image 3 . The prepared film was transparent. The transmittance of the film measured by UV-Vis spectroscopy was 65%. The conductivity of the carbon nanometer was measured by a multimeter to be 1.5×10 5 S / m. The transmission electron microscope observed that the film was composed of laminated carbon nanotubes ( Figure 4 ).

Embodiment 2

[0024] The preparation process of carbon nanotube film is the same as that of Example 1. The solution was prepared with ferrocene with a mass ratio of 0.1% and thiophene with a mass ratio of 0.4%. It was observed that a continuous carbon nanotube film with a diameter of 1.0 cm was formed on the side of the reactor. Spinning the film at a spinning speed of 2 meters per minute for 1 hour, the carbon nanotube film can be completely untethered in the opposite direction of spinning, and the untethered film is transparent. The measured film transmittance is 70% and the conductivity is 1.0× 10 5 S / m, electron microscope observed that the film in the film was single-walled carbon nanotubes.

Embodiment 3

[0026] The preparation process of carbon nanotube film is the same as that in Example 1, with the mass percentage of 2% cobalt acetate as the catalyst, and the formation of a continuous carbon nanotube film with a diameter of 2.0 cm was observed on the side of the reactor, and the film was spun at a spinning speed of 2 meters per minute. Within hours, the spun carbon nanotube film can be dissociated, the dissociated carbon nanotube film is transparent, and the film is observed by transmission electron microscope as double-walled carbon nanotubes.

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Abstract

The invention relates to a method and a device for preparing a continuous transparent conductive carbon nanotube film. In the device, a water tank is connected with a quartz tube in a tubular furnacevia water seal chemical vapor reaction; a spindle shaft of a spindle film is installed on a seal water surface and rotates driven by a motor; the spindle shaft and the motor can be mounted in a smalltrough or on a bracket of the water surface; the mixed solution of ethanol, ferrocene and thiofuran are injected in a carrier gasflow of H2 with the speed of 200-4000ml / min to react at a high temperature of 900-1600 DEG C; the tubular continuous carbon nanotube film synthesized by reaction is spinned by the spindle shaft, and the spinned carbon nanotube film can be resolved; the size of the carbontube film is correlated to the size of the reactor, and the size of the carbon tube film can be adjusted by adjusting the reaction parameter as for special reactors; and the continuous transparent conductive carbon nanotube film of different structures can be prepared by altering the chemical mixture ratio of the reacted solution. The invention ensures that the continuous transparent conductive carbon nanotube film can be prepared in one step, has high preparation efficiency and simple reaction devices, and is suitable for large-scale production of carbon nanotube films.

Description

technical field [0001] The invention relates to a method and a device for preparing an electric carbon nanotube film, belonging to the field of nanomaterials. technical background [0002] Carbon nanotube film has excellent physical, mechanical, electrical, optical and other properties such as light weight, high specific surface area, transparency, high strength, high electrical conductivity, high thermal conductivity, electric field emission, infrared emission, etc., as transparent conductive materials, display materials, light-emitting devices. , energy storage, filtration, sensors, biological materials and other aspects have very broad application prospects. At present, the preparation of transparent conductive carbon nanotube films usually adopts the dispersed carbon nanotube solution film-forming method. The preparation involves physical and chemical treatments such as purification and dispersion. These processes are not only cumbersome, but also easily affect the struc...

Claims

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Application Information

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IPC IPC(8): C01B31/00
Inventor 李亚利冯建民王睿
Owner TIANJIN UNIV
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