Dispersion method for carbon nanotubes

Abstract

The invention discloses a dispersion method for carbon nanotubes, belonging to the field of new materials. The method comprises the following steps: (1) mixing the carbon nanotubes with a binder; (2) pressing the obtained mixture so as to prepare an electrode; (3) connecting the electrode with a negative electrode of a direct-current power supply, and using materials like metal as a positive electrode of the power supply; (4) keeping a certain distance between the positive electrode and the negative electrode of the power supply; and (5) turning on the power supply so as to generate electro-induced heat sources like electric arcs, plasmas and electric sparks with a certain strength between the two electrodes of an electric circuit, and subjecting the binder absorbed by the carbon nanotubes to phase change under the action of high temperature so as to effectively disperse the carbon nanotubes. The invention has the following beneficial effects: the dispersion method for the carbon nanotubes provided by the invention has obvious dispersion effect and is easy to realize large-scale preparation.

Description

Technical field: [0001] The invention belongs to the field of new materials and relates to a method for dispersing carbon nanotubes. Background technique: [0002] Carbon nanotubes are tubular materials with nanometer-level diameters formed by curling graphite sheets at a certain helix angle. It has a very large aspect ratio, good heat exchange performance along the length direction, and low heat exchange performance in the vertical direction. Using its anisotropy and proper orientation, a composite material with superior thermal conductivity can be obtained . However, due to the strong van der Waals force between the carbon nanotubes, coupled with its very large aspect ratio, it is easy to agglomerate during production and use, thereby reducing its performance. In use, it is often necessary to fully disperse the agglomerates of carbon nanotubes to achieve the desired effect. [0003] The excellent properties of carbon nanotubes make it have a wide range of application prospects...

AI Technical Summary

Problems solved by technology

However, the agglomeration effect of carbon nanotubes affects its excellent performance. At present, the main dispersion methods in the field of carbon nanotube research in my country include grinding, ultrasonic dispersion, and strong acid-base treatment, but these methods are limited to the laboratory research stage. The production of dispersed carbon nanotubes has not yet been effectively solved

Europe and the United States and other countries are ahead of us in research on carbon nanotubes, but their blockade of technology prevents us from obtaining an effective dispersion method. A carbon nanotube dispersion method proposed in this application aims to seek a large-scale The method of producing dispersed carbon nanotubes breaks the barriers of developed countries to the method of dispersing carbon nanotubes, and contributes to the research of carbon nanotubes in my country, so that carbon nanotubes can be widely used in military, aerospace and other fields

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