Nanotechnology in Oil and Gas Industries by Tawfik Abdo Saleh

Author:Tawfik Abdo Saleh
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

The effect of the loads on the tribological behavior of the graphene/MoS2 composite is shown in Fig. 6.34. The friction coefficient, WSD and WSW of esterified bio-oil (EBO), increased with load, due to the smaller micro-intervals between the friction pairs under higher loads (Xu et al. 2014b). There was a great decrease in the friction coefficient and wear loss of the EBO with graphene/MoS2 composite additives, up to 300 N. Exceeding this load, the friction coefficient and wear loss remained stable or increasing. At the same time, for the same load, the EBO with graphene/MoS2 composite additives showed the best lubricity in all the four lubricants. This confirms the synergistic lubricating effects between graphene and MoS2.

Fig. 6.34Average friction coefficient (a), WSD (b), and WSW (c) of steel specimens under different loads (Xu et al. 2015a). Notes: Filled star EBO; Filled circle EBO+0.5 wt% graphene; Filled square EBO+0.5 wt% MoS2; Filled triangle EBO+0.3 wt% graphene+0.2 wt% MoS2

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