BU Junmin1, YAN Jincan1, BAI Xuefeng1, REN Tianhui1*, ZHAO Yidong2
(1. School of Chemistry and Chemical Engineering, Key Laboratory for Thin Film and Microfabrication of the Ministry of Education, Shanghai Jiaotong University, Shanghai 200240, China 2. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China)
Abstract: In this paper several P-N type extreme pressure and antiwear additives are synthesized. The tribological properties of these additives in Polyoxyethylene Glycol are evaluated using two four-ball tribometers, and the tribofilms are investigated by the X-ray absorption near-edge structure (XANES) spectroscopy. The tribochemical mechanism of the additives are discussed. The results show that the additives have better anti-wear and friction reducing properties than the traditional P-N additive T308B in polyoxyethylene glycol, and the PN1 with shorter length alkyl chain has better anti-wear and friction reducing properties than others. XANES surface analysis results indicate that tribofilms are mainly composed of adsorbed layer and chemical reacted layer, and chemical reacted layer is constituted by phosphate and polyphosphate.
Key words: extreme pressureand antiwear additives; polyoxyethylene glycol; XANES tribofilm
E-mail: thren@sjtu.edu.cn
Tribology, Vol. 32, Issue 2, 2012, 113~118
