Method for purifying carbon material containing carbon nanotube, carbon material obtained by the purification method, and resin molded body, fiber, heat sink, sliding member, field emission source mat

Abstract

A purification method for a carbon material containing carbon nanotubes is provided, which satisfies the following requirements: The method should prevent carbon nanotubes from being damaged, broken or flocculated; the method should be capable of removing the catalyst metal and carbon components other than the carbon nanotubes; and the method should be applicable to not only multi-walled carbon nanotubes but also single-walled carbon nanotubes which will undergo significant structural changes when heated to 1400 DEG C or higher temperatures. The method is characterized by including a carbon material preparation process for preparing a carbon material containing carbon nanotubes by an arc discharge method, using an anode made of a material containing at least carbon and a catalyst metal; and a halogen treatment process for bringing the carbon material into contact with a gas containing a halogen and / or halogen compound.

Description

technical field [0001] The present invention relates to a method for refining carbon nanotube-containing carbon materials used, for example, as electrode materials for batteries or electric double layer capacitors, probes for scanning channel microscopes, conductive materials, or materials for reinforcing resins or ceramics, and the like A carbon material obtained by a refining method. Background technique [0002] The above-mentioned carbon nanotubes have a structure in which a mesh formed by a six-membered ring of carbon element is wound into a cylindrical shape, and can be roughly divided into Single-walled carbon nanotubes and multilayered carbon nanotubes (in addition, when the number of layers is 2 or 3, they are also sometimes called double-walled carbon nanotubes and triple-walled carbon nanotubes, respectively). [0003] Here, compared with the above-mentioned multi-walled carbon nanotubes, the above-mentioned single-walled carbon nanotubes have a simpler structure...

AI Technical Summary

Problems solved by technology

[0020] In the method (1), when dispersed in an acidic aqueous solution, the carbon nanotubes are damaged or cut by irradiating ultrasonic waves, resulting in the following problems: the performance of the carbon nanotubes is reduced, or the carbon nanotubes are degraded in the drying process after the acid treatment. Nanotubes are solidified into blocks, and it is not easy to disperse them in polymers, etc.

Images