Oxidative Stability of Base Lubricant Oil Monitored by Gas Chromatography–Mass Spectrometry: Influence of Sawdust-Derived Antioxidants

Abstract

This paper focuses on evaluating the potential of sawdust-derived antioxidants in oxidative stability of the lubricant oil samples monitored through gas chromatography−mass spectrometry (GC−MS). The plain and antioxidants-spiked oil samples were subjected to artificial aging at 100 °C for 6 h in a flow of air (10 L h −1 ). The results indicate that the antioxidants under study imparted thermo-oxidative stabilities to the oil compared to the plain sample and exhibited good antioxidants potential at 100 °C.

The influence of high temperature oxidation on molecular structure and performance of aviation base oils

“…To clarify, the effect is very important to choose right antioxidants in real working conditions. Modern technologies, such as rotary bomb oxidation tester, GCMS, and DSC, are powerful methods to analyze the oxidative stability of base oil while antioxidant is applied. Those techniques could thoroughly probe the molecular structure, thermal stability, and oxidation resistance of oil samples.…”

Influence of Biodiesel on Base Oil Oxidation as Measured by FTICR Mass Spectrometry

“…We can observe the effect of processes that increase the carbon number of the molecule via mass spectrometry by investigating the changes in the carbon number ranges observed; however, it is not possible to determine whether species have a linear or branched structure with direct infusion mass spectrometry alone. Additional techniques such as gas chromatography (GC) ,, or two-dimensional mass spectrometry would have to be employed to provide further insight into the structural arrangement of the carbon skeleton.…”

“…For the development of improved antioxidants, first a detailed characterization of the species present in oxidized base oils is needed, followed by an understanding of the oxidation processes occurring. Mass spectrometry has been previously used for the study of lubricant oils: ,,,− Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) offers the highest resolving power and mass accuracy of ultrahigh-resolution mass spectrometry (UHRMS) techniques and is well suited to the analysis of oxidized base oil. While techniques such as nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR) can give information about an average molecule occurring in a mixture, FTICR MS can give elemental compositional information to the thousands of individual species occurring within a sample.…”