Friction properties of surface-fluorinated carbon nanotubes

Abstract Surface 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 CnF (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.

[1]  D. Cram,et al.  Design of complexes between synthetic hosts and organic guests , 1978 .

[2]  Sidney R. Cohen,et al.  Hollow nanoparticles of WS2 as potential solid-state lubricants , 1997, Nature.

[3]  G. Amaratunga,et al.  Thin films of fullerene-like MoS2 nanoparticles with ultra-low friction and wear , 2000, Nature.

[4]  R. Tenne,et al.  Nanoparticles of Layered Compounds with Hollow Cage Structures (Inorganic Fullerene-Like Structures)† , 1998 .

[5]  Z. Kafafi,et al.  Optical and electronic properties of fullerenes and fullerene-based materials , 2000 .

[6]  L. B. Ebert.  Science of fullerenes and carbon nanotubes , 1996 .

[7]  W. E. Billups,et al.  Fluorination of single-wall carbon nanotubes and subsequent derivatization reactions. , 2002, Accounts of chemical research.

[8]  Hugh O. Pierson,et al.  Handbook of carbon, graphite, diamond, and fullerenes : properties, processing, and applications , 1993 .

[9]  J. Margrave,et al.  Poly(carbon monofluoride): a solid, layered fluorocarbon , 1978 .

[10]  Lei Zhang,et al.  Fluorination of pressure-polymerized C60 phases , 2005 .

[11]  Robert H. Hauge,et al.  Purification and Characterization of Single-Wall Carbon Nanotubes (SWNTs) Obtained from the Gas-Phase Decomposition of CO (HiPco Process) , 2001 .

[12]  H. Pierson.  Handbook of carbon, graphite, diamond, and fullerenes , 1992 .

[13]  Zhenning Gu,et al.  Functionalization of Nanoscale Diamond Powder: Fluoro-, Alkyl-, Amino-, and Amino Acid-Nanodiamond Derivatives , 2004 .

[14]  R. Smalley,et al.  Cutting Single-Wall Carbon Nanotubes through Fluorination , 2002 .

[15]  M. Marchetti,et al.  Evaluation of the Tribological behavior of Nano-Onions in Krytox 143AB , 2004 .

[16]  Valerii Yu. Dolmatov,et al.  Detonation synthesis ultradispersed diamonds: properties and applications , 2001 .

[17]  M. Dresselhaus.  Carbon nanotubes , 1995 .

[18]  L. Dai,et al.  Chemistry of Carbon Nanotubes , 2003 .