The influence of inclination of a solid surface on contact angles due to the effect of line tension

✍ Scribed by F.Y.H. Lin; D. Lib

• Book ID: 103966953
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 442 KB
• Volume: 87
• Category: Article
• ISSN: 0927-7757
• DOI: 10.1016/0927-7757(94)02766-8

✦ Synopsis

Generally, the effect of line tension on equilibrium contact angles is considered in the modified Young equation. However, the modified Young equation is valid only for capillary systems with a horizontal solid surface. In this paper, a general Young equation is derived for a sessile drop in contact with a solid surface of revolution. This general Young equation differs from the modified Young equation by incorporating the angle of inclination, fi, of a solid surface in the form cos fi into the line tension term. Furthermore, this paper discusses the effect of the angle of inclination on how much the line tension can influence the equilibrium contact angles. Finally, this general Young equation is used to devise a new strategy for determining line tension by measuring capillary rise in a tube with a varying diameter.