CARBON NANOTUBES FIBER HAVING LOW RESISTIVITY

摘要

Carbon nanotubes fibers having a resistivity lower than 120 muOmega*alphaeta are prepared by a wet spinning process comprising the steps of supplying a spin-dope comprising carbon nanotubes to a spinneret, extruding the spin-dope through at least one spinning hole in the spinneret to form spun carbon nanotubes fibers, coagulating the spun carbon nanotubes fibers in a coagulation medium to form coagulated carbon nanotubes fibers wherein the carbon nanotubes fibers are drawn at a draw ratio higher than 1.0, wherein the carbon nanotubes have a length of at least 0.5 mum. Even carbon nanotubes fibers having a resistivity lower than 50 muOmega*cm, which is lower than reported for nanotube fibers from any known production process. At the same time, the CNT fibers can have high modulus.