(1. 中南工业大学机电工程学院，长沙 410083；2. 湘潭大学机械工程学院，湘潭 411105)
摘 要: 运用摩擦学实验和红外光谱分析相结合的方法，考察了十二烷和硬脂酸在摩擦过程中发生的化学变化。分析结果表明：在室温下，静态的十二烷和硬脂酸均不与铝(或氧化铝)发生化学反应；在摩擦过程中，十二烷和硬脂酸均发生了化学反应，十二烷氧化生成了醇或过氧化物，硬脂酸与铝(或氧化铝)反应生成了交联结构的硬脂酸铝；虽然反应物和摩擦反应产物均以物理吸附的方式吸附于金属表面，但摩擦化学反应产物无论是在金属表面的吸附强度还是在减摩性能上均好于反应物，说明通过发生摩擦化学反应，润滑油的减摩性能得到了提高。
关键字: 十二烷；硬脂酸；摩擦化学
（1. College of Mechanical and Electrical Engineering,
Central South University of Technology, Changsha 410083, P.R.China
2. College of Mechanical Engineering, Xiangtan University, Xiangtan 411105, P.R. China）
Abstract:The tribochemical changes of dodecane and stearic acid in the course of friction was studied through tribology experiments and infrared spectra analysis. The results showed that dodecane and stearic acid don't react with aluminum (or aluminum oxide) at static state and environment temperature. During the rubbing process, alcohol or peroxide is formed by the oxide reaction of dodecane, and aluminum stearate with intermolecular crosslinked structure is formed by tribochemical reaction between stearic acid and aluminum (or aluminum oxide). Although the reagents and tribochemical reaction products adsorb on the rubbing surface in the pattern of physics adsorption, the tribochemical reaction products have larger adsorption strength and better tribological performance than reagents. These indicated that the tribological performances of lubricant has been improved by means of taking tribochemical reactions.
Key words: dodecane; stearic acid; tribochemical reaction
