期刊
TRIBOLOGY INTERNATIONAL
卷 116, 期 -, 页码 460-469出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2017.08.008
关键词
Graphene oxide; Water-based lubricant; pH value; Tribology
资金
- Baosteel [BA13012]
- Australian Research Council through Linkage Project [LP150100591]
- University of Queensland (UQ)
- ARC Discovery Project [P150104147]
- Australian Research Council [LP150100591] Funding Source: Australian Research Council
In this study, the tribological characteristic of aqueous dispersions of single-layer graphene oxide (GO) sheets was assessed as a function of pH. The flexible and large GO sheets were broken down and chemically reduced upon increasing the pH from 3.10 to 9.70. By using the 0.06 wt% GO suspension, the noise and vibration in tribological tests were eliminated, at the same time, the coefficient of friction (COF) and wear mark radius were reduced by 44.4% and 17.1%, respectively, compared with baseline water. While the increase of pH of the GO suspensions increased COF and wear significantly. The difference of the lubricating mechanism of the GO suspensions was attributed to the change of morphological and physicochemical properties of the GO sheets.
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