离子液体作为钢-聚四氟乙烯润滑剂的摩擦学性能研究

发布时间：2018-04-29 18:19

  本文选题：离子液体 + 钢/聚四氟乙烯　； 参考：《摩擦学学报》2016年02期

【摘要】：采用微动摩擦磨损试验机考察了不同条件下三种离子液体作为钢/聚四氟乙烯润滑剂的摩擦学性能,并与传统润滑油聚α-烯烃(PAO)及干摩擦条件下的摩擦学性能做了对比.采用扫描电子显微镜(SEM)及X射线光电子能谱仪(XPS)对磨斑表面进行了分析.结果表明:在变载变频试验条件下,三种离子液体与PAO的减摩抗磨性能相当;而在长磨试验条件下,离子液体均表现出优于PAO的摩擦学性能.原因是离子液体分子中的N、P、O等活性元素在摩擦过程中与聚四氟乙烯基底发生了摩擦化学反应,形成了具有润滑作用的化合物边界润滑膜,有效抑制了摩擦副的直接接触,而且该润滑膜的性能优于PAO润滑下形成的保护膜,从而使离子液体表现出优于PAO的摩擦学性能.
[Abstract]:The tribological properties of three ionic liquids as steel / polytetrafluoroethylene lubricants under different conditions were investigated by microdynamic friction and wear tester, and compared with the tribological properties of the traditional lubricating oil polyolefin (PAO) and dry friction conditions. Scanning electron microscope (SEM) and X ray photoelectron spectroscopy (XPS) were applied to the surface of the grinding spot. The results show that the friction reducing and anti-wear properties of the three ionic liquids and PAO are equal under the variable load frequency test conditions, and the ionic liquids all exhibit better tribological properties than PAO under the long grinding test conditions. The reason is that the N, P, O and other active elements in the ionic liquid molecules have been rubbed with the polytetrafluoroethylene base during the friction process. The chemical reaction has formed a compound boundary lubricating film with a lubricant, which effectively inhibits the direct contact of the friction pair, and the performance of the film is superior to the protective film formed under the PAO lubrication, thus making the ionic liquid exhibit a tribological performance superior to that of the PAO.

【作者单位】： 中科院兰州化学物理研究所固体润滑国家重点试验室;中国科学院大学;中石油兰州石化公司研究院;
【基金】：国家自然科学基金项目(51175492;51405477)资助~~
【分类号】：TH117
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本文编号：1821048