A comparative study of tribological properties between perfluoro and non-perfluoro alkylsilane self-assembled monolayers(SAMs)
A comparative study of tribological properties between perfluoro and non-perfluoro alkylsilane self-assembled monolayers(SAMs)
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全氟和非全氟烷基硅烷自组装单层膜（SAM）摩擦学性能的比较研究
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
G. Xie
中科院分区：
文献类型：
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作者：
Xinkuan Wang;Yuhong Liu;Jianbin Luo;G. Xie
比较了全氟烷基硅烷分子膜和非全氟烷基硅烷分子膜的摩擦学性能。用X射线光电子能谱(XPS)、原子力显微镜(AFM)和接触角(CA)对其表面性质进行了表征。利用球盘式摩擦试验机研究了烷基硅烷单分子膜的摩擦性能。实验结果表明，烷基硅烷分子膜是一种良好的减摩候选材料，具有良好的抗剪切能力。全氟烷基硅烷分子膜与硅衬底的结合效果好于单烃分子膜。滑动速度和法向载荷对摩擦系数的影响较大，摩擦系数随滑动速度的增加而增大。摩擦系数随法向载荷的增加先减小后增大，说明载荷效应存在临界值。
The tribological properties of perfluoro and non-perfluoro alkylsilane molecular films were investigated and compared detailedly. Their surface properties were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and contact angle (CA) measurement. A ball-on-disk tribometer was used to study the frictional properties of these alkylsilane monolayers. The experimental results reveal that the alkylsilane molecular films are good candidates to decrease friction and they have good capability to endure rigorous shear forces. Perfluoro alkylsilane molecular films are bonded better with the Si substrate than the simple hydrocarbon ones. The effects of sliding velocity and normal load on friction coefficient are evident and the friction coefficient increases with the increase of the sliding velocity. However, friction coefficient decreases with the increase of normal load initially and then increases, indicating there exists a critical normal load for the load effect.