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Journal of Nanomaterials
Volume 2014, Article ID 654145, 8 pages
http://dx.doi.org/10.1155/2014/654145
Research Article

Synthesis, Characterization, and Tribological Behavior of Oleic Acid Capped Graphene Oxide

1State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2Huaibei Normal University, School of Chemistry and Materials Science, Huaibei 235000, China
3Graduate School of Chinese Academy of Sciences, Beijing 100039, China
4College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China
5School of Materials Science and Engineering, Central South University, Changsha 410083, China
6Gansu University of Traditional Chinese Medicine, Lanzhou 730000, China

Received 4 November 2013; Revised 17 December 2013; Accepted 24 December 2013; Published 3 February 2014

Academic Editor: Jinlong Jiang

Copyright © 2014 Tiedan Chen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Graphene oxide (GO) nanosheets were prepared by modified Hummers and Offeman methods. Furthermore, oleic acid (OA) capped graphene oxide (OACGO) nanosheets were prepared and characterized by means of Fourier transform-infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and X-ray diffraction (XRD). At the same time, the friction and wear properties of OA capped graphite powder (OACG), OACGO, and oleic acid capped precipitate of graphite (OACPG) as additives in poly-alpha-olefin (PAO) were compared using four-ball tester and SRV-1 reciprocating ball-on-disc friction and wear tester. By the addition of OACGO to PAO, the antiwear ability was improved and the friction coefficient was decreased. Also, the tribological mechanism of the GO was investigated.