Tribological studies on a novel borate ester containing benzothiazol-2-yl and disulfide groups as multifunctional additive

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• 作者：Jiusheng Li ; Xiaohong Xu ; Yonggang Wang ; Tianhui Ren
• 关键词：Extreme pressure additives ; Thermal stability ; Oxidation resistance ; XPS
• 刊名：Tribology International
• 出版年：2010
• 出版时间：May-June 2010
• 年：2010
• 卷：43
• 期：5-6
• 页码：1048-1053
• 全文大小：585 K

文摘

A novel borate ester derivative containing benzothiazol-2-yl and disulfide group (BTSB) was synthesized and characterized. Its tribological properties used as EP and multifunctional additive in rapeseed oil were evaluated using a four-ball tribometer, and its action mechanisms were investigated by the X-ray photoelectron spectroscopy. Results show that the BTSB possesses comprehensive tribological properties in load-carrying, friction-reducing, antiwear, corrosion-inhibiting, and anti-oxidation, which probably has a chance to replace ZDDP partially. Moreover, the decomposed borate esters, organic sulfide and nitrogen adsorbed on worn surface were detected, and S element in BTSB reacted with metal and generated FeSO₄, both of which contributed to the formation of boundary lubricating film.