Tribological behavior of a novel organic molybdenum containing dimercaptothiadiazole as a multifunctional additive in biodegradable base oil. (August 2021)

• Record Type: Journal Article
• Authors: Wang, Jiao; Huang, Xuefei; Li, Zhipeng; Fu, Chao; Wang, Chenchen; Zheng, Lei; Ren, Tianhui
• Is Part Of: Materials & design. Volume 206(2021)
• Publication Date: 2021-08
• Subjects: Thiadiazole -- Molybdate ester -- Multifunctional -- XANES -- Tribofilm; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2021.109823
• Languages: English
• ISSNs: 0264-1275

Abstract

Graphical abstract: Highlights: A simple method for organic molybdenum containing dimercaptothiadiazole is proposed. The COF and WSD are significantly decreased by ~39% and ~42%, respectively. A tribofilm rich in sulfate and molybdate on the frictional surface is detected. The shearing force and the tribo-heat are key factors for the generation of MoS2 . Abstract: Organic molybdenum friction modifier is an indispensable lubricating material owing to its remarkable tribological behavior, which has been widely used in various fields. Here, a feasible method is provided for the synthesis of thiadiazole organic molybdenum as a multifunctional lubricant additive in the trimethylolpropane trioleate biodegradable base oil. Results show that the coefficient of friction and the wear scar diameter are significantly decreased by ~39% and ~42%, respectively. Moreover, its extreme pressure performance is also improved by more than 50%. The XANES results show that the functional group of the thiadiazole and molybdate in the additive molecule will form a tribofilm rich in sulfate and molybdate to enhance the properties of friction-reducing, anti-wear and load-bearing capacity of the based oil.