Method for preparing high-conductivity and high-toughness carbon nanotube fiber through vacuum sealing and two-phase region normal-pressure ferric trichloride nondestructive doping

Abstract

The invention relates to the field of preparation of high-performance carbon nanotube fibers, in particular to a method for preparing high-conductivity and high-toughness carbon nanotube fibers through vacuum sealing and two-phase region normal-pressure ferric trichloride nondestructive doping. Carbon nano tube fibers are used as raw materials, and a normal-pressure double-phase region heating method is adopted, so that controllable doping of ferric trichloride molecules among carbon nano tubes and in tube cavities is realized on the premise that intrinsic structures of the carbon nano tubes are not damaged; through surface charge transfer between ferric trichloride molecules and the carbon nanotubes and the action of the ferric trichloride molecules and the tube walls of the carbon nanotubes, the electrical and mechanical properties of the carbon nanotube fibers are greatly improved. According to the method, stable and controllable doping of ferric trichloride is realized while the structural integrity of the carbon nanotubes is maintained, the electrical and mechanical properties of the carbon nanotube fibers are improved, and the method is expected to be applied to the fields of wearable electronic equipment, aerospace and the like.

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