【摘要】 合成了(4-氟-3-三氟甲基苯氧基)环三磷嗪,采用核磁共振氢谱(1HNMR)和傅立叶转换红外光谱仪对其结构进行了表征,利用热重法分析了其热稳定性,在SRV型摩擦磨损试验机上评价了其作为季戊四醇酯添加剂对钢/钢体系的润滑作用,并采用扫描电子显微镜和X射线光电子能谱仪分析了其作用机理.结果表明,同另一种芳氧基磷嗪化合物X-1P相比,(4-氟-3-三氟甲基苯氧基)环三磷嗪作为高温润滑油添加剂表现出更好的摩擦学性能.就磷嗪衍生物添加剂而言,氟代芳氧基中的氟含量对摩擦学性能具有重要影响.在摩擦过程中,(4-氟-3-三氟甲基苯氧基)环三磷嗪与摩擦副表面发生了复杂的摩擦化学作用,在摩擦副表面形成了含Fe3(PO4)2及FeF2等物质的边界润滑膜,从而表现出减摩、抗磨和承载作用.更多还原

【Abstract】 (4fluorophenol3trifluorm ethylphenoxy) cyclotriphosphazene (coded as XLZ) was synthesized and evaluated as an additive in pentaerythritol ester (PET) lubricant for a steelsteel contact. The thermal stability of the synthetic additive was examined and compared with that of another phosphazene additive X1P,by means of thermogravimetric analysis.The friction and wear behaviors of the steelsteel system under the lubrication of PET containing XLZ was investigated and compared with that under the lubrication of PET containing X1P,on an Optimol SRV oscillating friction and wear tester in a ballondisc configuration.The worn steel surfaces were analyzed by means of scanning electron microscopy and Xray photoelectron spectroscopy,and the tribochemical action mechanisms of the additive were accordingly discussed. As the results,XLZ as an additive in PET showed excellent tribological behavior and was superior to X1P in terms of the frictionreducing and antiwear ability. Such a superiority of the XLZ in PET was more prominent at increased temperature and load.XLZ as an additive in PET experienced tribochemical reaction with the steel surface at increased temperature and load,with the formation of a boundary film composed of Fe3(PO4)2 and FeF2,which contributed to improve the antiwear and loadcarrying capacity of the base stock.更多还原