Implanting MnO2 into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

Chen, Xiaorong, Chen, Wenting, Zhang, Linyi, Zeng, Minli, Yang, Shiming, Yang, Zanhe, Ola, Oluwafunmilola, Thummavichai, Kunyapat, Wang, Nannan and Zhu, Yanqiu (2022) Implanting MnO2 into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance. Crystals, 12 (4). p. 451. ISSN 2073-4352

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Hexagonal boron nitride nanosheets (h-BNNs) show great potential in the field of tribology due to their typical two-dimensional layered structure and are essential for replacing conventional sulfur/phosphate-containing additives. However, the large particle size and poor dispersion of h-BNs seriously restrict their green lubrication application. In this paper, MnO2@h-BNNs nanocomposites were successfully prepared by ultrasonically exfoliating a hydrothermal method. The tribological properties of MnO2@h-BNNs nanocomposites as lubricant additives in poly-alpha-olefin oil (PAO) were investigated. The results show the oil dispersed with 0.25 wt% MnO2@h-BNNs had the best friction reduction and antiwear effect with 42% and 11.2% reduction, respectively, compared with the plain oil. Through further wear surface analyzing, we verified the antiwear mechanism of additives in filling the micropits and grooves on the wear surface and forming a friction protection film including Fe2O3, MnO2, and BN on the wear surface, avoiding direct contact between the friction subsets. This can provide ideas for other lubricating oil additives.

Item Type: Article
Additional Information: Funding information: National Natural Science Foundation (grant no.: 51972068).
Uncontrolled Keywords: hexagonal boron nitride (h-BN); manganese dioxide; lubricant additive; PAO6; tribological properties
Subjects: F100 Chemistry
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 10 Jan 2023 11:17
Last Modified: 10 Jan 2023 11:30

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