The pH-dependent structural and tribological behaviour of aqueous graphene oxide suspensions

He, Anshun, Huang, Shuiquan, Yun, Jung-Ho, Jiang, Zhengyi , Stokes, Jason , Jiao, Sihai , Wang, Lianzhou and Huang, Han (2017) The pH-dependent structural and tribological behaviour of aqueous graphene oxide suspensions. Tribology International, 116 460-469. doi:10.1016/j.triboint.2017.08.008


Author He, Anshun
Huang, Shuiquan
Yun, Jung-Ho
Jiang, Zhengyi
Stokes, Jason
Jiao, Sihai
Wang, Lianzhou
Huang, Han
Title The pH-dependent structural and tribological behaviour of aqueous graphene oxide suspensions
Journal name Tribology International   Check publisher's open access policy
ISSN 0301-679X
1879-2464
Publication date 2017-12-01
Year available 2017
Sub-type Article (original research)
DOI 10.1016/j.triboint.2017.08.008
Open Access Status Not yet assessed
Volume 116
Start page 460
End page 469
Total pages 10
Place of publication Kidlington, Oxford, United Kingdom
Publisher Elsevier
Language eng
Abstract 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.
Keyword Graphene oxide
pH value
Tribology
Water-based lubricant
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID BA13012
LP150100591
P150104147
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
School of Chemical Engineering Publications
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Created: Tue, 12 Sep 2017, 13:35:35 EST by Anthony Yeates on behalf of Learning and Research Services (UQ Library)