PURIFICATION METHOD OF CARBON NANOTUBES

摘要

A purification process of carbon nanotube is provided to remove effectively various impurities including metal catalyst particles coated with carbon, carbon nano-particle and amorphous carbon inevitably included when the carbon nanotube is manufactured. A purification process of carbon nanotube comprises steps of: irradiating ultrasonic wave after putting the carbon nanotube which is not re-fined into an aqueous acid solution or a surfactant solution and dispersing the aqueous acid solution or the surfactant solution; moving a solution in which a carbon nanotube is dispersed to a glass filter and irradiating ultrasonic wave and reducing pressure; and injecting and heating oxidative gas after putting the carbon nanotube filtered with the ultrasonic wave pressure in a heater.