| 초록 |
Carbon nanotube CNT) fibers, composed entirely of CNT bundles, have inferior mechanical properties as adjacent CNTs slide past each other when an external force is applied. Numerous surface coatings have been tried, but all these approaches have caused a severe damage to the electrical properties. As a measure to address such problems, we present the coating of ion-gel on CNT fibers, made up of the mixture of PVDF derivatives and ionic liquids. It has been intuitively expected that the former provides a smooth coverage on the fiber surface while the latter makes up for a detrimental effect on the electrical conductivity. In order to further improve the tensile properties, a single CNT fiber was pile into multi-ply yarns and twisted together. SEM images of resulting CNT fibers revealed significant changes on the morphology of fiber surfaces. Their mechanical and electrical properties were investigated depending on the number and direction of twists. |
