Gradient ultra-high-speed centrifugal purification method for single-chiral carbon nanotubes

The invention discloses an echelon ultra-high-speed centrifugal purification method of a single-chiral carbon nanotube. The echelon ultra-high-speed centrifugal purification method comprises the following steps: uniformly dispersing a polymer and a single-walled carbon nanotube raw material in a solvent to form a dispersion liquid, and carrying out centrifugal treatment to obtain a dispersion liquid supernatant; and performing ultra-high-speed centrifugal treatment on the dispersion liquid supernatant to form a solid matter and a liquid phase system enriched with the single-chiral carbon nano tube, thereby obtaining the high-purity single-chiral carbon nano tube. The echelon ultra-high-speed centrifugal purification method provided by the invention is simple to operate, mild in condition and high in separation efficiency, does not cause defective damage to the carbon nanotubes, and can realize batch preparation of the high-purity single-chiral carbon nanotubes; and meanwhile, the prepared single-chiral carbon