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使用原子力 /摩擦力显微镜 ,在 5 %— 99%相对湿度范围 ,研究了二氧化硅和二氧化硅基体上十八烷基三甲氧基硅烷自组装膜 (简称OTESAM/SiO2 )表面粘着力随湿度的变化规律 .实验表明 ,二氧化硅表面的粘着力随湿度的增大先逐渐增大 ,然后急剧减小 .相反 ,OTESAM/SiO2 由于其良好的斥水性 ,表面的粘着力随湿度的增大基本不变 .着重从基本界面力 ,即表面张力、范德瓦耳斯力和基本键合力的形成与变化 ,分析了二氧化硅表面粘着力随湿度的增大先增后减的原因 ,探讨了粘着力的产生机理
The surface adhesion of octadecyltrimethoxysilane self-assembled film (OTESAM / SiO2) on silica and silica substrates was studied with atomic force / friction microscope at 5% -99% relative humidity with humidity The experimental results show that the adhesion of silica surface increases with the increase of humidity and then decreases sharply.On the contrary, OTESAM / SiO2 due to its good water repellency, surface adhesion with the increase of humidity Basically unchanged.From the basic interface force, namely the surface tension, the van der Waals force and the formation and change of the basic bonding force, the analysis of the surface of the silica surface adhesion increases with the increase of humidity after the first reason The adhesion mechanism