Chemically functionalized carbon nanotubes and their characterization using thermogravimetric analysis, fourier transform infrared, and raman spectroscopy |
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Authors: | E Titus N Ali G Cabral J Gracio P Ramesh Babu M J Jackson |
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Affiliation: | (1) Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal;(2) Polymer Research Center, Department of Physics, Trinity College, Dublin 2, Ireland;(3) Birck Nanotechnology Center and College of Technology, Purdue University, 47907-2021 West Lafayette, IN |
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Abstract: | This article reports key findings on the chemical functionalization of carbon nanotubes (CNT). The functionalization of chemical
vapor-deposited CNT was carried out by treating tubes with polyvinyl alcohol through ultrasonication in water with the aid
of a surfactant. The surfactant is expected to promote the unbundling of aggregated CNT. The characterization of functionalized
samples using thermogravimetric analysis, Fourier transform infrared spectroscopy, and Raman spectroscopy revealed that the
CNT were functionalized by the interaction of carboxylic acid and hydroxyl groups. From the characterization studies, it is
apparent that there is a strong interaction between these functional groups and the covalently bonded carbon in the CNT network.
The functionalization process enabled good CNT dispersion in the solution, and the CNT remained in suspension for many days.
To support the effective functionalization of the tubes, the interaction of functionalized CNT with Ni ions is also demonstrated.
This paper was presented at the fourth International Surface Engineering Congress and Exposition held August 1–3, 2005 in
St. Paul, MN. |
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Keywords: | carbon nanotubes chemical vapor deposition dispersion functionalization |
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