Lube-Tech PUBLISHED BY LUBE: THE EUROPEAN LUBRICANTS INDUSTRY MAGAZINE


standards. The upcycling of mixed waste plastics as base oils for lubricants and additives for commercial lubricants proves itself a worthwhile, environmentally friendly investment towards lubrication technology that could reinforce our carbon economy. [10]


No.156 page 6


three-membered heterocyclic rings known as “triangle esters” (LCEE and LCTE) derived from fatty acids and compared their properties on various substrates with esters synthesised from linear and alicyclic alcohols, LCLE and LCCE, respectively. Figure 6 displays the unique chemical structures of these esters. According to Sharma et al., effective lubrication is contingent upon the wettability of the lubricant or the affinity of a lubricant towards the substrate. The wettability of a lubricant can be evaluated by its spreading parameter (SP) or spreading-wetting tendency, a trait dependent on chemical structure, surface tension, and polarity. Here, the surface tension and polarity of synthesised esters, the building blocks of lubricant oils, will be measured to calculate spreading parameters that reflect their overall lubrication potential.


Figure 4: COF of PAO10 and HQL Concentrations at 25o


C [10]


Figure 5: COF of PAO10 and HQL Concentrations at 100o


C [10]


2. A New Class of Synthetic Lubricants: “Triangle Ester” [11]


Figure 6: Chemical Structures of Synthesised Esters [11]


In 2023, Sharma et al., explored a new class of cyclic esters that could have potential in lubrication applications. They have synthesised unprecedented


36 LUBE MAGAZINE NO.185 FEBRUARY 2025


The surface tension of LCEE, LCTE, LCLE, and LCCE on various substrates, including aluminum (AL),


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