Implanting MnO<sub>2</sub> into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

Xiaorong Chen; Wenting Chen; Linyi Zhang; Minli Zeng; Shiming Yang; Zanhe Yang; Oluwafunmilola Ola; Kunyapat Thummavichai; Nannan Wang; Yanqiu Zhu

doi:10.3390/cryst12040451

Crystals (Mar 2022)

Implanting MnO<sub>2</sub> into Hexagonal Boron Nitride as Nanoadditives for Enhancing Tribological Performance

Xiaorong Chen,
Wenting Chen,
Linyi Zhang,
Minli Zeng,
Shiming Yang,
Zanhe Yang,
Oluwafunmilola Ola,
Kunyapat Thummavichai,
Nannan Wang,
Yanqiu Zhu

Affiliations

Xiaorong Chen: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Wenting Chen: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Linyi Zhang: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Minli Zeng: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Shiming Yang: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Zanhe Yang: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Oluwafunmilola Ola: Advanced Materials Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK
Kunyapat Thummavichai: Department of Mathematics and Physical Sciences, College of Engineering, University of Exeter, Exeter EX4 4QF, UK
Nannan Wang: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China
Yanqiu Zhu: Guangxi Institute Fullerene Technology (GIFT), Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, School of Resources Environment and Materials, Guangxi University, Nanning 530004, China

DOI: https://doi.org/10.3390/cryst12040451
Journal volume & issue: Vol. 12, no. 4
p. 451

Abstract

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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.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

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