摘要
采用低温硫化工艺和复分解反应制备了无臭硫化廿二酸 ,在四球摩擦磨损试验机上考察了其在菜籽油中的减摩抗磨行为及承载能力 ,并对钢球磨损表面进行了扫描电子显微 (SEM )、电子探针 (EPMA)以及X射线光电子能谱 (XPS)分析。通过与廿二酸和硫化异丁烯的对比研究发现 ,在廿二酸中引入硫后 ,氧与硫产生了明显的协同减摩抗磨及承载作用。钢球磨损表面XPS分析结果表明 ,在摩擦过程中硫化廿二酸发生了摩擦化学变化 。
Non-odour sulfurized docosanoic acid was prepared by low temperature vulcanization and metathetical reaction. Its load-carrying capacity, friction-reducing and antiwear properties as additive in rapeseed oil were evaluated using four-ball testers. The worn surface was analyzed with X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). By comparison with docosanoic acid and sulfurized ios-butyl olefin, it was found that when sulfur element was introduced into docosanoic acid, oxygen and sulfur elements showed synergistic friction-reducing, antiwear and load-carrying action. The analysis of the worn surface shows that tribochemical reactions occurred during friction process. Oxygen and sulfur elements were enriched in surface protective film of the worn surface.
基金
中国科学院高技术研究与发展局资助重点项目! (1998)。
关键词
硫化廿二酸
菜籽油
摩擦学性能
磨损机理
润滑剂
Sulfurized docosanoic acid, Rapeseed oil, Tribological performance, Synergistic action, Wear mechanism
