In a significant stride towards enhancing marine engine efficiency, researchers have developed a novel hybrid additive that promises to revolutionize lubrication in marine diesel engines. The study, led by Yuwen Xu from the School of Transportation and Logistics Engineering at Wuhan University of Technology in China, introduces a unique combination of a 1,3-diketone fluid and nanocopper particles to improve the boundary lubrication of marine engine oil.
The research, published in the journal ‘Lubricants’ (translated from the original title), focuses on the critical cylinder liner–piston ring (CLPR) interface, which plays a pivotal role in the energy efficiency and reliability of marine diesel engines. The team introduced a 1,3-diketone fluid named HPTD (1-(4-hexylphenyl) tridecane-1,3-dione) as an ash-free friction modifier. Additionally, they incorporated octadecylamine-functionalized nanocopper particles (ODA-Cu) to bolster the oil’s anti-wear properties.
Through rigorous cylinder-on-disk friction tests, the researchers determined the optimal concentrations of HPTD and ODA-Cu, which were then combined to form hybrid additives. These additives were used to modify the engine oil, and its tribological performance was evaluated under various conditions, including different normal loads, reciprocating frequencies, and testing temperatures.
The results were impressive. The modified oil exhibited a 15% reduction in the coefficient of friction, a 43% smaller wear track, and an 11% higher maximum non-seizure load compared to the pristine engine oil. This performance boost is attributed to the synergy between the tribochemical reaction of HPTD and the mending effect of ODA-Cu on the sliding surface.
“Based on the synergy of the tribochemical reaction of HPTD and the mending effect of ODA-Cu on the sliding surface, the modified oil not only had lower sulfated ash content but also exhibited superior lubrication performance,” Xu explained.
The implications for the maritime industry are substantial. Improved lubrication can lead to enhanced energy efficiency, reduced wear and tear, and lower maintenance costs. As the industry increasingly focuses on sustainability and operational efficiency, such innovations are crucial. The hybrid additives developed by Xu and his team offer a promising avenue for designing novel, eco-friendly additives for marine engine oil, potentially paving the way for greener and more efficient maritime operations.
For maritime professionals, this research highlights the importance of investing in advanced lubrication technologies. As ships become more sophisticated and environmental regulations tighten, the need for high-performance, eco-friendly lubricants will only grow. The work of Xu and his team underscores the potential of hybrid additives to meet these evolving demands, offering a glimpse into the future of marine engine lubrication.