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Preparation and Tribological Properties of Graphene Lubricant Additives for Low-Sulfur Fuel by Dielectric Barrier Discharge Plasma-Assisted Ball Milling

1
School of Marine Engineering, Jimei University, Xiamen 361021, China
2
School of Marine Technology, Beibu Gulf University, Qinzhou 535011, China
3
Geetanj Bhandari, Rtec Instruments Inc., San Jose, CA 95131, USA
*
Author to whom correspondence should be addressed.
Processes 2021, 9(2), 272; https://doi.org/10.3390/pr9020272
Received: 26 December 2020 / Revised: 22 January 2021 / Accepted: 28 January 2021 / Published: 31 January 2021
Poor lubrication performance of low-sulfur fuel leads to increased wear of diesel engine components. In order to improve the lubrication properties of low-sulfur fuel, we successfully prepared graphene lubricant additives by dielectric barrier discharge plasma-assisted ball milling. The tribological properties of graphene lubricant additives in two types of 0# diesel oils with different sulfur content were evaluated by high-frequency reciprocating rig (HFRR). The results indicated that the expanded graphite was exfoliated and refined into graphene sheets with nine layers by the synergistic effect of the heat explosive effect of the discharge plasma, the impact of mechanical milling function, and the cavitation effect of 0# diesel oil. The organic functional groups of 0# diesel oil were successfully grafted on the surface of graphene sheets. The addition of 0.03 wt % graphene resulted in 20% reduction in the friction coefficient (COF) and 28% reduction in wear scar diameter (WSD) compared to pure 0# diesel oil with a sulfur content of 310 mg/kg. The addition of 0.03 wt % graphene resulted in 24% reduction in the friction coefficient (COF) and 30% reduction in wear scar diameter (WSD) compared to pure 0# diesel oil with a sulfur content of 1.1 mg/kg. The formation of graphene tribofilm on rubbing surfaces improved the lubrication properties of low-sulfur fuel. View Full-Text
Keywords: low-sulfur fuel; graphene; lubricant additive; lubrication property; surface modification; dielectric barrier discharge plasma-assisted ball milling low-sulfur fuel; graphene; lubricant additive; lubrication property; surface modification; dielectric barrier discharge plasma-assisted ball milling
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MDPI and ACS Style

Hou, X.; Ma, Y.; Bhandari, G.; Yin, Z.; Dai, L.; Liao, H.; Wei, Y. Preparation and Tribological Properties of Graphene Lubricant Additives for Low-Sulfur Fuel by Dielectric Barrier Discharge Plasma-Assisted Ball Milling. Processes 2021, 9, 272. https://doi.org/10.3390/pr9020272

AMA Style

Hou X, Ma Y, Bhandari G, Yin Z, Dai L, Liao H, Wei Y. Preparation and Tribological Properties of Graphene Lubricant Additives for Low-Sulfur Fuel by Dielectric Barrier Discharge Plasma-Assisted Ball Milling. Processes. 2021; 9(2):272. https://doi.org/10.3390/pr9020272

Chicago/Turabian Style

Hou, Xianbin, Yanjun Ma, Geetanj Bhandari, Zibin Yin, Leyang Dai, Haifeng Liao, and Yukun Wei. 2021. "Preparation and Tribological Properties of Graphene Lubricant Additives for Low-Sulfur Fuel by Dielectric Barrier Discharge Plasma-Assisted Ball Milling" Processes 9, no. 2: 272. https://doi.org/10.3390/pr9020272

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