Experimental and Molecular Level Analysis of the Tribological and Oxidative Properties of Chaulmoogra Oil

Abstract

This study introduces chaulmoogra oil as a base stock for lubricant formulation. The tribological properties of chaulmoogra oil are evaluated by quantitative structure-property relation (QSPR) technique using the molecular modelling package Spartan 18. The quantum chemical calculations were performed on a typical molecule of chaulmoogra oil and its constituent fatty acids. The orbital energy gap of the constituent fatty acids in chaulmoogra oil is 7.37 eV and that of chaulmoogra oil molecule is 6.8 eV, which is less than that of the lauric acid, the main constituent of coconut oil (7.78 eV). Orbital energy gap predicts a better tribological performance for chaulmoogra oil, and the four ball test result is in agreement with this prediction. Oxidative property of chaulmoogra oil is tested by isothermal thermogravimetric/differential thermal analysis (TGA/DTA) and compared with different oils. Weight gain in oxygen is only 0.02% for chaulmoogra oil and showed better oxidative stability among all other tested oils.

Experimental and Theoretical Studies on Extract of Date Palm Seed as a Green Anti-Corrosion Agent in Hydrochloric Acid Solution

“…Phthalic acid possesses a low ∆E value, which suggests greater reactivity and strong inhibition performance on the Fe surface. The ∆E of oleic acid is lower than lauric acid, as also found by [44]. Other work reports by [45] on lauric, myristic, oleic and caprylic acid show the ∆E of 7.60 eV for lauric and myristic while oleic, caprylic acid have ∆E of 6.16 eV and 7.62 eV, respectively.…”

“…The tendency of the inhibitor molecule to contribute electrons to the metal surface is correlated with E HOMO , while E LUMO is used to explain the ability of inhibitor molecules to obtain electrons from the metal surface [43]. Inhibitors with higher E HOMO values show a high propensity to donate electrons to the metal surface of the unoccupied d-orbital [44]. The E HOMO increasing values facilitate adsorption on the metal surface, thereby improving the effectiveness of inhibition.…”

Development of solid lipid nanoparticle gel for transdermal delivery system of chaulmoogra oil

“…Determination of λ max of HA by UV UV spectrum of HA was taken at 203 nm (Figure S1). The obtained UV spectra of HA were similar to CMO and the results obtained were equivalent to other reported studies showing λ max in the range of 200-400 nm [24].…”

“…The study involved a developed and validated HPTLC method for the identification and quantification of HA on the basis of their chromatographic separation and isolation from CMO followed by characterization using high edge analytical techniques such as UV, NMR, DSC, and MS. CMO constitutes more than 50% of HA, among all the cyclopentyl fatty acids as per a reported study [24]. The amount of HA quantified in the sample was found to be 54.839% w/w.…”