低抵抗率、高弾性率、および／または高熱伝導率を有するカーボンナノチューブ繊維、ならびに、繊維紡糸ドープを用いた紡糸による当該繊維の製造方法

摘要

Carbon nanotubes (CNT) fibers having a resistivity lower than 120 μ&OHgr;*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 μ&OHgr;*cm. At the same time, the CNT fibers can have high modulus.