FTIR Spectrum Interpretation of Lubricants with Treatment of Variation Mileage

Abstract

Infrared spectroscopy is a widely used technique for the analysis of lubricating oil, lubricating analyzed in this study on Motorcycle. Taking advantage of FTIR spectroscopy (Fourier Transform Infra Red) in the process of identifying the molecular structure of a compound. Samples lubricants used are mineral and Lubricants Synthetic Lubricants. The goal is to see is there a shift in the spectrum of functional groups and intensity of absorption. In the analysis of changes in or degradation of the lubricant in the FTIR spectrum, lubricants mineral or synthetic, assessed based on several parameters lubricants namely, Oxidation (carbon) (1700 cm-1), Nitration (1630 cm-1), Soot (2000 cm-1), Sulfation (1150 cm-1) and water (3400 cm-1). The results showed that based on the analysis of the spectrum for some parameter, synthetic lubricants have the advantage compared to mineral lubricants. Synthetic lubricants have better viscosity stability compared to mineral lubricants, this is because synthetic lubricants generally have better chemical properties / its chemical structure uniform than mineral lubricants. The use of synthetic lubricants have an impact on fuel consumption savings, this is because its viscosity is most stable.

Keywords: FTIR spectroscopy; synthetic lubricants; mineral lubricants; viscosity