【摘要】 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更多还原

【Abstract】 The adhesion characteristic of surfaces of SiO 2 and the self\|assembled film of octadecyltrime\|thoxysilane (OTE SAM) on the surface of SiO 2 under the relative humidity of 5%—99% were studied using atomic force microscopy/friction force microscopy.Experimental results indicate that the adhesion force of SiO 2 increases first with the relative humidity and then decreases sharply.However,the adhesion force of OTE SAM surface hardly changes with the relative humidity due to its strong hydrophobe property.The mechanism of the adhesion force changing with the relative humidity has been analyzed from the viewpoint of surface tension,van der Walls force,and basic bond forces.更多还原