Chem. J. Chinese Universities

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Chemical Structure of Tribofilms and Thermalfilms of Benzothiazole Derivatives Containing Ester Group

WU Hua*, LI Jing, REN Tian-Hui   

  1. School of Chemistry and Chemical Engineering, Shanghai Jiaotong University, Shanghai 200240, China
  • Received:2007-11-01 Revised:1900-01-01 Online:2008-08-10 Published:2008-08-10
  • Contact: WU Hua

Abstract: Two kinds of 2-mercaptobenzothiazole derivatives MBTT and MBTA are synthesized, which are characterized by means of element analysis and 1H NMR. X-ray absorption near edge structure(XANES) spectroscopy was used to analyze the chemical structure of both thermal films and tribofilms. To our know-ledge, this would be the first comprehensive study where XANES were used to examine the tribofilms and thermalfilms from heterocyclic compounds. According to the XANES analytic results, in mineral oil, the tribofilms generated from two additives MBTT and MBTA are composed of FeS2. However, in RSO, the corresponding tribofilms are composed of FeSO4. The thermalfilms are composed of FeSO4 in both mineral oil and RSO.

Key words: Benzothiazole, X-ray absorption near edge structure spectra(XANES), Tribofilm, Thermalfilm

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