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利用自组装技术在硅基底制备FOTS自组装分子膜,对FOTS自组装分子膜进行紫外照射.采用接触角测量仪、原子力显微镜(AFM)、傅里叶红外变换光谱仪(FTIR)、X光电子能谱(XPS)和多功能摩擦磨损试验机(UMT)评价薄膜的表面特性和摩擦学特性.结果表明:FOTS自组装分子膜的蒸馏水接触角为109°.紫外照射导致C元素被O3氧化,形成亲水的-COOH末端基团,使其接触角变小,表面粗糙度增大.在微载荷下,FOTS自组装分子膜和经不同时间紫外照射的FOTS自组装分子膜均可降低硅基底的摩擦和磨损.紫外照射后使FOTS自组装分子膜的摩擦系数增大,磨损加剧,这与其表面结构和润湿性变化相关.
The self-assembled FOTS self-assembled molecular films were prepared by self-assembly technique, and the FOTS self-assembled molecular films were irradiated by UV light.Using the contact angle measurement, atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and multi-purpose friction and wear tester (UMT) were used to evaluate the surface and tribological properties of the film.The results showed that the contact angle of distilled water of FOTS self-assembled molecular film was 109 °, and the UV irradiation led to the oxidation of C element by O3, Water -COOH terminal groups, the contact angle becomes smaller, the surface roughness increases.Under the micro-load, the FOTS self-assembled molecular film and the FOTS self-assembled molecular film irradiated by different time UV can reduce the friction of the silicon substrate And abrasion.Furthermore, the friction coefficient of FOTS self-assembled molecular film increased and the abrasion increased, which was related to the change of its surface structure and wettability.