三正辛硫基三嗪的摩擦性能研究

The Tribology Study of Trioctylthio-triazine

利用四球摩擦磨损试验机考察了三正辛硫基均三嗪(TOTT)在菜籽油中的摩擦学性能.实验结果表明,类化合物具有良好的极压性能,能很大地提高菜籽油的极压性能.利用X射线光电子能谱(XPS)和扫描电子显微镜(SEM)分析了钢球磨损表面典型元素的化学状态,并探讨了该类添加剂的摩擦学机理.利用液质联用考察了该化合物在十六烷中摩擦前后的变化,结果表明,在摩擦过程中,TOTT分子发生了分解,主要是与C原子连接的含S支链从三嗪环上脱落,再与钢球表面发生摩擦化学反应,在钢球表面形成了一层含硫,磷的富氧膜和有机氮复合膜,这种复合膜是添加剂具有优异摩擦学性能的主要原因.

The compound of 2,4,6-trioctyhhio-1,3,5-triazine （TOTT） as additive in rapeseed oil was examined with fourball machine. The results show that the additive greatly incrcased the load-carrying capacity of the base oil. The typical elements chemical status of worn surface of the lubricated stcel ball were analyzed by means of X-my photoelectron spectroscopy （XPS） and scanning electron micros copy（SEM）. And the paper studied the change of tribological process of TOTT in hexadecane by a LS-MS. The resuhs show that the TOTT decomposed in the tribological process, the S-containing branch connecting with triazine ring was off, reacted with the freshly steel ball surface, to form a protective film containing ferric sulfide, ferric sulfate, organicsulfur compound and organicnitrogen compound on the rubbed surface. The protective film contributed to the increase in the wear resistance and friction reduction.