Fullerene C60 as an inhibitor of high temperature lipid oxidation

Non-isothermal oxidation of a model saturated lipid (stearic acid) in the bulk phase in the presence of fullerene C-60 at concentrations of 1-8 mM was monitored by differential scanning calorimetry in order to determine the kinetic parameters that describe the global first order oxidation process. The activation energies, pre-exponential factors, and rate constants calculated by the Ozawa-Flynn-Wall method for the first detectable exothermic effect of oxidation, indicate the antioxidant behavior of C-60 over a wide range of temperatures that makes it a non-corrosive agent effectively increasing the oxidative stability of lubricants and biolubricants. (c) 2012 Elsevier Ltd. All rights reserved.