Rapid oxidative activation of carbon nanotube yarn and sheet by a radio frequency,atmospheric pressure,helium and oxygen plasma |
| |
| Affiliation: | 1. NanoBio-Polymers Lab, Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA;2. Complex Assemblies of Soft Matter, Centre National de la Recherche Scientifique – Rhodia, University of Pennsylvania, Unité Mixte Internationale 3254, Bristol, PA 19007, USA |
| |
| Abstract: | Carbon nanotube yarn and sheet were activated using radio frequency, atmospheric pressure, helium and oxygen plasmas. The nanotubes were exposed to the plasma afterglow, which contained 8.0 × 1016 cm−3 ground state O atoms, 8.0 × 1016 cm−3 metastable O2 (1Δg), and 1.0 × 1016 cm−3 ozone. X-ray photoelectron spectroscopy and infrared spectroscopy revealed that 30 s of plasma treatment converted 25.2% of the carbon atoms on the CNT surface to oxidized species, producing 17.0% alcohols, 5.9% carbonyls, and 2.3% carboxylic acids. The electrical resistivity increased linearly with the extent of oxidation of the CNT from 4 to 9 × 10−6 Ω m. On the other hand, the tensile strength of the yarn was decreased by only 27% following plasma oxidation. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
