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Friction Properties of Surface-Fluorinated Carbon NanotubesSurface modification of the tubular or sphere-shaped carbon nanoparticles through chemical treatment, e.g., fluorination, is expected to significantly affect their friction properties. In this study, a direct fluorination of the graphene-built tubular (single-walled carbon nanotubes) structures has been carried out to obtain a series of fluorinated nanotubes (fluoronanotubes) with variable C(n)F (n =2-20) stoichiometries. The friction coefficients for fluoronanotubes, as well as pristine and chemically cut nanotubes, were found to reach values as low as 0.002-0.07, according to evaluation tests run in contact with sapphire in air of about 40% relative humidity on a ball-on-disk tribometer which provided an unidirectional sliding friction motion. These preliminary results demonstrate ultra-low friction properties and show a promise in applications of surface modified nanocarbons as a solid lubricant.
Document ID
20070006418
Document Type
Reprint (Version printed in journal)
Authors
Wal, R. L. Vander (National Center for Microgravity Research on Fluids and Combustion Cleveland, OH, United States)
Miyoshi, K. (NASA Glenn Research Center Cleveland, OH, United States)
Street, K. W. (NASA Glenn Research Center Cleveland, OH, United States)
Tomasek, A. J. (National Center for Microgravity Research on Fluids and Combustion Cleveland, OH, United States)
Peng, H. (Rice Univ. Houston, TX, United States)
Liu, Y. (Rice Univ. Houston, TX, United States)
Margrave, J. L.
Khabashesku, V. N. (Rice Univ. Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
May 10, 2005
Publication Information
Publication: Wear
Volume: 259
ISSN: 0043-1648
Subject Category
Physics (General)
Funding Number(s)
CONTRACT_GRANT: C-0109
CONTRACT_GRANT: 003604-0026-2001
CONTRACT_GRANT: NCC1-02038
Distribution Limits
Public
Copyright
Other