Abstract
Our present work is to elucidate the mechanism by which fullerenes inhibit the autoxidation reaction of lubricating oil to achieve the development of new multifunctional additives to replace ZnDTP. In this study, we generated discharge in lubricating oils with different amounts of fullerenes to investigate the radical trapping effect of fullerenes and the structural changes of fullerenes associated with radical trapping. The lubricating oils with fullerenes were found to exhibit a radical trapping effect depending on the amounts of fullerenes. Additionally, the lubricating oils with fullerenes were discoloration with radical trapping reaction, and the absorbance at a wavelength of 330 nm decreased in response to radical trapping. These consequences reveal that the structure of radical trapped fullerene was changed. Thus, the consumption of fullerenes can be detected by the decrease in absorbance near 330 nm.
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