(1. 中南工業(yè)大學(xué)機(jī)電工程學(xué)院，長(zhǎng)沙 410083；2. 湘潭大學(xué)機(jī)械工程學(xué)院，湘潭 411105)
摘 要: 運(yùn)用摩擦學(xué)實(shí)驗(yàn)和紅外光譜分析相結(jié)合的方法，考察了十二烷和硬脂酸在摩擦過(guò)程中發(fā)生的化學(xué)變化。分析結(jié)果表明：在室溫下，靜態(tài)的十二烷和硬脂酸均不與鋁(或氧化鋁)發(fā)生化學(xué)反應(yīng)；在摩擦過(guò)程中，十二烷和硬脂酸均發(fā)生了化學(xué)反應(yīng)，十二烷氧化生成了醇或過(guò)氧化物，硬脂酸與鋁(或氧化鋁)反應(yīng)生成了交聯(lián)結(jié)構(gòu)的硬脂酸鋁；雖然反應(yīng)物和摩擦反應(yīng)產(chǎn)物均以物理吸附的方式吸附于金屬表面，但摩擦化學(xué)反應(yīng)產(chǎn)物無(wú)論是在金屬表面的吸附強(qiáng)度還是在減摩性能上均好于反應(yīng)物，說(shuō)明通過(guò)發(fā)生摩擦化學(xué)反應(yīng)，潤(rùn)滑油的減摩性能得到了提高。
關(guān)鍵字: 十二烷；硬脂酸；摩擦化學(xué)
（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
