Tribology Letters

, Volume 25, Issue 3, pp 247–253

Tribological behaviors of surfactant-functionalized carbon nanotubes as lubricant additive in water


DOI: 10.1007/s11249-006-9176-7

Cite this article as:
Peng, Y., Hu, Y. & Wang, H. Tribol Lett (2007) 25: 247. doi:10.1007/s11249-006-9176-7

The multi-walled carbon nanotubes (MWCNTs) are functionalized by self-assembled surfactant layers after sonication in anionic surfactant sodium dodecyl sulfate (SDS) aqueous solution. The tribological properties of the SDS-functionalized MWCNTs as additive in water-based lubricants were evaluated with a four-ball tester. The results show that the SDS-functionalized MWCNTs exhibit good anti-wear and friction reduction properties as well as enhanced load-carrying capacity. The maximum non-seizure load (PB value) can be raised about 3–7 times when SDS-functionalized MWCNTs were added into water. The mechanism of SDS-functionalized MWCNT additive was investigated with scanning electron microscopy (SEM), Auger electron spectroscopy (AES), and Raman spectroscopy. These preliminary results show a promise in applications of surfactant functional carbon nanotubes as an additive in water.


nanotribology additive solubility friction mechanism water-based lubricants 

Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.State Key Laboratory of TribologyTsinghua UniversityBeijingChina

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