Highly dispersed dialkyl dithiophosphate-functionalized ZIF-8 particles as additives of the lubricating oil
- Resource Type
- JOURNAL
- Authors
- Ma, Hongxia; Wu, Wei; Zhang, Heng; Wang, Zeyun
- Source
- Industrial Lubrication and Tribology, 2022, Vol. 74, Issue 5, pp. 531-541.
- Subject
- research-article
Research paper
cat-ENGG
Engineering
Mechanical engineering
Engineering
ZIF-8
Surface modification
Lubricating additives
Tribological properties
- Language
- English
- ISSN
- 0036-8792
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.