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Method and device for orientating carbon nanotube

A technology of carbon nanotubes and orientation, applied in the direction of nanotechnology, chemical instruments and methods, carbon compounds, etc., can solve the problems of material preparation and large external traction that are difficult to achieve carbon nanotube orientation, and achieve good orientation effect and orientation resistance Small size and low energy consumption

Inactive Publication Date: 2012-10-03
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this patented method, the orientation of carbon nanotubes is completed in the liquid droplets dropped on the silicon substrate. In the process of orientation alignment, to overcome the viscous resistance inside the liquid, a large external traction force needs to be applied, and it is difficult to realize large-area carbon nanotubes. Preparation of tube-oriented materials

Method used

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  • Method and device for orientating carbon nanotube
  • Method and device for orientating carbon nanotube
  • Method and device for orientating carbon nanotube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] In the winding molding process, multi-walled carbon nanotubes with an outer diameter of 3.79nm, an inner diameter of 2nm, and a length of 30 μm are arranged at 90° on the surface of a 30cm wide glass fiber bundle as an example for the first embodiment of the carbon nanotube orientation method involved in the present invention. Describe in detail.

[0046] Set up the electric field device. At 50 cm ahead of the glue tank filled with phenolic resin glue, a pair of metal electrodes 1 with a width of 8 cm and a height of 10 cm are vertically arranged above the surface of the fiber bundle, such as figure 1 As shown, the distance between the two metal electrodes 1 is 31 cm, parallel to the direction of the fiber bundle, and the lower surface of the electrode 1 is 5 cm away from the surface of the fiber bundle.

[0047] Select the carbon nanotube release device. The carbon nanotube release device selected in the method of the present invention is a V-3 spray gun 2 with ...

Embodiment 2

[0055] The difference from Example 1 is that an AC voltage of 310,000 volts with a frequency of 5 MHz is applied to the metal electrode, and an AC voltage of 45,000 volts with a frequency of 5 MHz is applied to the electric field section at the front end of the spray gun.

Embodiment 3

[0057] The difference from Example 1 is that a 50,000-volt AC voltage with a frequency of 5 MHz is applied to the metal electrode, and a 15,000-volt AC voltage with a frequency of 5 MHz is applied to the electric field tube section at the front end of the spray gun.

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Abstract

The invention discloses a method for orientating a carbon nanotube. According to the method, an electric field device is arranged in the motion process of the carbon nanotube and the carbon nanotube is allowed to be orientated in the air before covering the surface of a matrix, so that the resistance in the orientation process of the carbon nanotube is smaller and the orientation degree is higher and further the voltage required by orientation is reduced; an electric field can be only applied to the front end of a spray gun or can be applied to the surrounding air of the matrix or can be simultaneously applied to the front end of the spray gun and the surrounding air of the matrix; and after the carbon nanotube is subjected to the orientation for two times, the orientation degree of the carbon nanotube is higher. Compared with the prior art, the method disclosed by the invention has the advantages that the orientation resistance of the carbon nanotube is reduced, high orientation degree is obtained and the orientation can be quickly realized on a large scale.

Description

technical field [0001] The invention relates to a material orientation method, in particular to a carbon nanotube orientation method. Background technique [0002] If carbon nanotubes are arranged in a certain direction on the substrate in an orderly manner, they can give full play to their role compared to the disordered arrangement, and can more effectively improve the mechanical, thermal or electromagnetic properties of the substrate in a given direction. [0003] In the prior art, there have been reports about the orientation of carbon nanotubes in a liquid dispersant environment by means of electromagnetic or drawing. Chinese patent CN 200410009281.3 discloses a method for controlling the orientation of carbon nanotubes. A solution containing carbon nanotubes is dropped on a silicon substrate prefabricated with electrodes, and the shape and structure of the electrodes are designed according to the alignment requirements of carbon nanotubes. Applying alternating current...

Claims

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Application Information

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IPC IPC(8): C01B31/02B82Y40/00C01B32/168C01B32/172
Inventor 陈以蔚郑志才秦贞明王丹勇李树虎徐井利贾华敏郭建芬
Owner NO 53 RES INST OF CHINA NORTH IND GRP