Tribological, oxidation and thermal conductivity studies of microwave synthesised molybdenum disulfide (MoS2) nanoparticles as nano-additives in diesel based engine oil

Thachnatharen Nagarajan; Mohammad Khalid; Nanthini Sridewi; Priyanka Jagadish; Syed Shahabuddin; Kasturi Muthoosamy; Rashmi Walvekar

doi:10.1038/s41598-022-16026-4

Tribological, oxidation and thermal conductivity studies of microwave synthesised molybdenum disulfide (MoS₂) nanoparticles as nano-additives in diesel based engine oil

Sci Rep. 2022 Aug 18;12(1):14108. doi: 10.1038/s41598-022-16026-4.

Authors

Thachnatharen Nagarajan¹, Mohammad Khalid², Nanthini Sridewi³, Priyanka Jagadish⁴, Syed Shahabuddin⁵, Kasturi Muthoosamy⁶, Rashmi Walvekar⁷

Affiliations

¹ Faculty of Defence Science and Technology, National Defence University of Malaysia, Kuala Lumpur, Malaysia.
² Graphene and Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University, Selangor, Malaysia. khalids@sunway.edu.my.
³ Faculty of Defence Science and Technology, National Defence University of Malaysia, Kuala Lumpur, Malaysia. nanthini@upnm.edu.my.
⁴ Graphene and Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University, Selangor, Malaysia.
⁵ Department of Science, School of Technology, Pandit Deendayal Petroleum University, Gandhinagar, Gujarat, India.
⁶ Centre for Nanotechnology and Advanced Materials (CENTAM), Faculty of Engineering, University of Nottingham Malaysia Campus (UMNC), 43500, Semenyih, Selangor, Malaysia.
⁷ Department of Chemical Engineering, School of New Energy and Chemical Engineering, Xiamen University Malaysia, Jalan Sunsuria, Bandar Sunsuria, 43900, Sepang, Selangor, Malaysia.

Abstract

Lubrication has become essential in enhancing engine efficiency in the era of rapid globalising. The tribological, oxidation and thermal conductivity properties of an engine oil play a vital role in improving the quality of a vehicle's engine life. In this research, molybdenum disulfide (MoS₂) nanoparticle was synthesised via a microwave hydrothermal reactor. Later, the nanoparticles were dispersed in SAE 20W50 diesel engine oil to formulate the nanolubricant. The results show that nanolubricant with 0.01 wt% MoS₂ concentration showed the coefficient of friction, average wear scar diameter decreased by 19.24% and 19.52%, respectively, compared to the base oil. Furthermore, the nanolubricant with 0.01 wt% concentration of MoS₂ nanoparticle showed an enhancement of 61.15% in oxidation induction time in comparison to the base oil. Furthermore, MoS₂ addition within the base oil demonstrates a ~ 10% improvement in thermal conductivity compared to the base oil.

Grants and funding

STR-IRNGS-SET-GAMRG-01-2022/Sunway University