Title

Tribological Characteristics of Aqueous Graphene Oxide, Graphitic Carbon Nitride, and Their Mixed Suspensions

RIS ID

119935

Publication Details

He, A., Huang, S., Yun, J., Jiang, Z., Stokes, J. R., Jiao, S., Wang, L. & Huang, H. (2018). Tribological Characteristics of Aqueous Graphene Oxide, Graphitic Carbon Nitride, and Their Mixed Suspensions. Tribology Letters, 66 (1), 42-1-42-12.

Abstract

The tribological performance of graphene oxide (GO), graphitic carbon nitride (g-C 3 N 4 ), and their mixed (g-C 3 N 4 /GO) aqueous suspensions was investigated. The 0.06 wt% GO, 0.06 wt% g-C 3 N 4 , and 0.06 wt% 1:1 g-C 3 N 4 /GO suspensions reduced the coefficient of friction (COF) by 37, 26 and 37% and wear mark radius by 19.1, 16.0 and 19.6%, respectively, in comparison with water. Pure g-C 3 N 4 and GO suspensions showed unstable lubrication in the tests with relatively high loads and speeds, while the g-C 3 N 4 /GO mixed suspension had superior tribological performance in all tested conditions. This is because in the mixed suspension g-C 3 N 4 agglomerates became smaller, and GO nanosheets exhibited fewer wrinkles and less stacking, which enabled the formation of a layer of tribo-composite film. As a result, the friction, wear and tribo-corrosion were reduced during sliding.

Grant Number

ARC/LP150100591

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