Abstract
The paper studies the lubricant properties of blends of Thevetia peruviana oil (TPO) and Cucurbita pepo L. oil (CPO) prepared at different proportions. The physicochemical properties were determined as per ASTM standard and the anti-wear and extreme pressure tests were performed using four-ball tribotester as per ASTM D4172–94 and ASTM D2783, respectively. The blend of 40% TPO and 60% CPO was found the best blend as per the Entropy-TOPSIS method and further at optimal concentration of 1 wt% of titanium oxide nanoparticles it exhibited the coefficient of friction of 0.0329 ±0.002 and wear scar diameter of 0.291 ± 0.005 mm. The present study indicates that TPO-CPO blends with optimal additivation can be an alternative biodegradable solution to commercial mineral oils.
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