Experimental investigation of tribological effect on vegetable oil with CuO nanoparticles and ZDDP additives
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 29 March 2019
Issue publication date: 3 April 2019
Abstract
Purpose
This paper aims to report the friction and wear characteristics of refined soybean oil (RSBO) blended with copper oxide (CuO) nanoparticles and zinc dialkyldithiophosphate (ZDDP) as additives.
Design/methodology/approach
Four different concentrations 0.04, 0.05, 0.1 and 0.2 Wt.% of CuO nanoparticles were added with ZDDP in RSBO. The friction and wear characteristics of lubricants have been investigated on a pin-on-disc tribotester under loads of 120 and 180 N, with rotating speeds of 1,200 and 1,500 rpm in half hour of operating time. The dispersion stability of CuO nanoparticles has been analyzed using ultraviolet visible (UV-Vis) spectroscopy. The wearout surface of pins has been examined by using a scanning electron microscope.
Findings
The results revealed that there is a reduction in the friction and wear by the addition of CuO nanoparticles and ZDDP in RSBO. Coefficient of friction increases at a high sliding speed for RSBO with ZDDP. From UV-Vis spectroscopy, it is observed that 100 ml of oleic acid surfactant per gram of CuO nanoparticles has stable dispersion in RSBO.
Originality/value
The addition of ZDDP and CuO nanoparticles in RSBO is more efficient to reduce the friction and wear in comparison to base oil. The optimum concentration of CuO nanoparticles in RSBO is 0.05 Wt.%.
Keywords
Acknowledgements
The authors would like to acknowledge the financial support from the Department of Science and Technology, Delhi, India, under the PURSE program.
Citation
Kumar, G., Garg, H.C. and Gijawara, A. (2019), "Experimental investigation of tribological effect on vegetable oil with CuO nanoparticles and ZDDP additives", Industrial Lubrication and Tribology, Vol. 71 No. 3, pp. 499-508. https://doi.org/10.1108/ILT-05-2018-0196
Publisher
:Emerald Publishing Limited
Copyright © 2019, Emerald Publishing Limited