The invention provides a method and a device for improving mechanical and electrical properties of a carbon
nano tube through drafting densification and application of the method and the device. The method comprises the following steps: providing an original
carbon nanotube aggregate; contacting the original
carbon nanotube aggregate with a volatile
protonation reagent and carrying out drafting treatment to obtain a drafted aggregate; and directly carrying out heat treatment on the drawn aggregate to evaporate the volatile
protonation reagent to obtain the enhanced
carbon nanotube aggregate. According to the method, the problem of disordered orientation distribution of carbon tubes in an original carbon
nanotube film is solved by utilizing large-proportion drafting, and then the problem that the densified structure of the carbon tubes is damaged due to heat generated by extruding
chlorosulfonic acid by utilizing
solvent concentration difference by adopting coagulating bath is solved by carrying out direct
evaporation densification operation; according to the preparation method, the orientation of the carbon tubes is reserved to a great extent, meanwhile, the carbon tubes form a close packing structure, the electro-
mechanical property of the carbon
nanotube aggregate is greatly improved, meanwhile, the preparation method is simpler and more convenient, the time needed by preparation is shortened, and no
organic solvent is needed.