Research of Natural Antioxidants Influence on Oxidation Stability and Tribological Properties of Rapeseed Oil

Abstract

Vegetable oils have good tribological and viscosity properties together with excellent biodegrad- ability and non-toxicity. Unfortunately, their wider use is restricted by poor oxidation stability. Durability of vegetable oil based lubricants depends mainly on oxidation. This problem has been analysed in many research works. Nevertheless, scientists agree that there still remain many unanswered questions in this field. In this study the sage and thyme extracts and attars are suggested for use as antioxidants in rapeseed oil. The influence of natural antioxidants on oxidation stability, kinematic viscosity and tribological properties of rapeseed oil was measured. The sage and thyme extracts studied showed good oxidation stabili¬sation properties and had no negative influence on tribological properties of rapeseed oil