Spreading and adhesion forces for water droplets on methylated glass surfaces
Spreading and adhesion forces for water droplets on methylated glass surfaces
复制标题
DOI：
10.1016/j.colsurfa.2020.124562
复制
发表时间：
2020-04-20
影响因子：
5.2
通讯作者：
Drelich, Jaroslaw W.
中科院分区：
文献类型：
--
作者：
Sun, Yujin;Li, Yatao;Drelich, Jaroslaw W.
测量液体沉积在不同表面化学和形貌的固体表面上的铺展力和毛细力是更好地理解和量化润湿机制的先决条件。在这项研究中，载玻片表面改性与三甲基氯硅烷制造不同的疏水性表面。然后，使用高灵敏度的微电子天平测量水滴与玻璃表面之间的铺展力和粘附力。结合数码相机，实验装置记录力和水滴变形过程中的水滴附着，扩展，压缩和收缩过程。据证实，铺展力随着甲基化玻璃的前进接触角的减小而增加，遵循与光滑和粗糙聚合物所观察到的类似的相关性。然而，甲基化玻璃的铺展力值比聚合物报告的值低几倍，尽管具有类似的粗糙度特性。还证实了水滴和甲基化玻璃之间的最大粘附力随着最稳定接触角的减小而增加，这种相关性与光滑聚合物的相关性类似。
Measurements of the spreading and capillary forces for liquids deposited on solid surfaces of varying surface chemistry and topography are a prerequisite to better understanding and quantification of the wetting mechanisms. In this study, glass slide surfaces were modified with trimethylchlorosilane to fabricate surfaces of varying hydrophobicity. Then, the forces of spreading and adhesion were measured between water droplets and glass surfaces using a high-sensitivity microelectronic balance. Integrated with a digital camera, the experimental set-up recorded forces and water droplet deformations during water droplet attachment, spreading, compression and retraction processes. It was confirmed that the spreading force increases with decreasing advancing contact angle for methylated glass, following a similar correlation as observed for smooth and rough polymers. However, the spreading force values for methylated glass were a few times lower than reported for polymers in spite of a similar roughness characteristic. It was also confirmed that the maximum adhesion force between water droplet and methylated glass increases with decreasing value of the most stable contact angle, a correlation that is similar to that reported for smooth polymers.