Journal Article

High-strength carbon nanotube fibre-like ribbon with high ductility and high electrical conductivity

Chen, Y., Luo, X. G., Wu, T., Wang, J. N.

2014

Overview

Macroscopic fibres made up of carbon nanotubes exhibit properties far below theoretical predictions and even much lower than those for conventional carbon fibres. Here we report improvements of mechanical and electrical properties by more than one order of magnitude by pressurized rolling. Our carbon nanotubes self-assemble to a hollow macroscopic cylinder in a tube reactor operated at high temperature and then condense in water or ethanol to form a fibre, which is continually spooled in an open-air environment. This initial fibre is densified by rolling under pressure, leading to a combination of high tensile strength (3.76–5.53 GPa), high tensile ductility (8–13%) and high electrical conductivity ((1.82–2.24) × 10 4  S cm −1 ). Our study therefore demonstrates strategies for future performance maximization and the very considerable potential of carbon nanotube assemblies for high-end uses. There is strong interest in carbon nanotube assemblies for a variety of applications, many of which require combined high mechanical and electrical properties. Here, the authors demonstrate a rolling technique for performance improvement, reporting tensile strength of 4.34 GPa, ductility of 10% and electrical conductivity of 2.0 × 10 4  S cm −1 .

• Publisher: Nature Publishing Group UK,Nature Publishing Group
• Subject: 639/301/1023/303 / 639/301/119/995 / 639/301/357/73 / 639/301/930 / Carbon / Ductility / Electrical properties / Ethanol / High temperature / Humanities and Social Sciences / multidisciplinary / Nanotechnology / Science / Science (multidisciplinary)