CARBON NANOTUBES FIBER HAVING LOW RESISTIVITY, HIGH MODULUS AND/OR HIGH THERMAL CONDUCTIVITY AND A METHOD OF PREPARING SUCH FIBERS BY SPINNING USING A FIBER SPIN-DOPE

摘要

Carbon nanotubes (CNT) fibers having a resistivity lower than 120 μΩ*cm are prepared by a wet spinning process including the steps of supplying a spin-dope of carbon nanotubes to a spinneret, extruding the spin-dope through at least one spinning hole in the spinneret to form spun carbon nanotubes fibers, and coagulating the spun carbon nanotubes fibers in a coagulation medium to form coagulated carbon nanotubes fibers. The carbon nanotubes fibers are drawn at a draw ratio higher than 1.0. The carbon nanotubes have a length of at least 0.5 μm. The carbon nanotubes fibers can further have a resistivity lower than 50 μΩ*cm. At the same time, the CNT fibers can have high modulus.

主权项

1. A carbon nanotubes (CNT) fiber comprising at least 50 wt. % of carbon nanotubes, wherein the CNT fiber has a resistivity, measured at a temperature of 20° C., of less than 50 μΩ*cm.