Highly dispersed dialkyl dithiophosphate-functionalized ZIF-8 particles as additives of the lubricating oil
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 15 April 2022
Issue publication date: 30 May 2022
Abstract
Purpose
This paper aims to propose a new strategy to functionalize zeolitic imidazolate frameworks (ZIF-8) to improve its dispersion stability and tribological properties in lubricating oil.
Design/methodology/approach
Dialkyl dithiophosphate polydopamine ZIF-8 (DDP@PDA@ZIF-8) was prepared via mussel-inspired chemistry and the Michael addition reaction. The tribological properties of DDP@PDA@ZIF-8 as an additive in the white oil were evaluated with four-ball friction and wear tester at different temperatures. The worn surface was analyzed using X-ray photoelectron spectrum (XPS).
Findings
The as-prepared DDP@PDA@ZIF-8 shows high dispersion stability in the white oil. Tribological results confirmed that the DDP@PDA@ZIF-8 exhibited a small wear scar diameter at 25°C. However, excellent friction reduction and anti-wear properties were observed at 75°C. The XPS result indicates that a series of tribochemical reactions occurred on the worn surface, forming the complex protective film.
Originality/value
This paper provides a study of highly dispersed ZIF-8 as lubrication additives.
Keywords
Acknowledgements
The authors thank the financial support of Natural Science Foundation of Ningxia Province (2020AAC03016), The Fourth Batch of Ningxia Youth Talents Supporting Program (TJGC2019004) and Ningxia Higher School Scientific Research Project (NGY2020014).
Citation
Ma, H., Wu, W., Zhang, H. and Wang, Z. (2022), "Highly dispersed dialkyl dithiophosphate-functionalized ZIF-8 particles as additives of the lubricating oil", Industrial Lubrication and Tribology, Vol. 74 No. 5, pp. 531-541. https://doi.org/10.1108/ILT-10-2021-0417
Publisher
:Emerald Publishing Limited
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