CNTの引張特性に及ぼすCNT径・熱処理の影響のCNT無撚糸を用いた検討

抄録

Carbon nanotube (CNT) is tubular nanofibers made of cylindrical graphene sheets. CNT is thought to have higher tensile strength and elastic modulus than those of conventional carbon fibers. Its ideal mechanical properties are estimated to be about 1 TPa for Young's modulus and 10 GPa or more for tensile strength. However, intrinsic excellent mechanical properties of CNTs have not been fully utilized owing to defects of graphene, catalysts left in the core of CNTs and kinks of graphene layers. Decreasing the diameter of CNT and annealing of CNT at high temperature are thought to be useful to improve the tensile properties of CNT. In this study, we investigated the effects of annealing and diameter of CNTs on the tensile properties of CNTs by conducting tensile tests of as-produced and annealed CNT untwisted yarns.