Journal
CARBON
Volume 191, Issue -, Pages 84-97Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2022.01.037
Keywords
Graphene; MoS2; Incommensurate stacking; Lubrication
Funding
- National Natural Science Foundation of China [52075458, 51805455, U2141211]
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Reduced graphene oxide/molybdenum disulfide heterostructure nanosheets were synthesized via a facile method and exhibited excellent dispersity and stability in industrial gear oil, leading to significant reduction in friction and wear.
Reduced graphene oxide (rGO)/molybdenum disulfide (MoS2) heterostructure nanosheets (rGO-MoS2-1) were synthesized via vertically growing of MoS2 on rGO skeleton using a facile one-pot hydrothermal method. Toward high-performance lubrication additive, the rGO-MoS2-1 in industrial gear oil shows extraordinary dispersity and stability because its steric hindrance effect restrains the aggregation and settling tendency. More importantly, its introduction can significantly reduce the friction (similar to 16.7%) and wear (up to 80%) under the sliding contact. The characterization and analysis on the worn surfaces reveal that good dispersion stability, the formation of rGO-MoS2-based lubrication protective film, and the lower shear strength induced by the inherent lattice mismatch between rGO and MoS2 are the key factors in the friction reduction and protection the tribo-interfaces against wear. (C) 2022 Elsevier Ltd. All rights reserved.
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