天然鳞片石墨与油溶性添加剂相互作用的研究

Study of the Interaction between Natural Flake Graphite and Oil Soluble Additives

考察了天然鳞片状石墨与润滑油脂中几种常用油溶性添加剂的相互作用及其对油品润滑性能的影响．结果表明：仅添加石墨的润滑油的润滑性较差，而添加石墨与含活性基团添加剂的油品润滑性明显提高，石墨与润滑油中几种添加剂具有良好的配伍性和一定的协同作用．利用Ｘ射线光电子能谱仪检测了不同工艺条件下以石墨与含活性元素Ｓ的添加剂复合后Ｓ在石墨上的吸附量．石墨与某些添加剂的协同作用是在摩擦过程中相互作用形成了复合膜的结果．

The interaction between natural flake graphite and oil soluble additives and the effect of the interaction on the lubrication property of oils have been investigated. The results show that the oil containing graphite only exibits poor lubricity, but the oil containing both graphite and additive with active elements or group gives much better lubricity. This indicates that there exist good compatability and some synergism between graphite and oil additives. The adsorption content of S elelemt on graphite from the mixture of graphite and additives containing sulphur was detected by means of XPS analysis. It was found that the adsorption of organic sulphides on graphite was affected by the molecular structure of sulphides and the adsorption was benefitial for the lubricity. This could be attributed to the formation of the composite film of graphite and additives on the rubbing surfaces.