Adhesive Contact of a Membrane with a Hemispherical Indenter: Theoretical Analysis and Model Liquid System
| Autor: | Wendy Da Wei Cheng, Rebecca E. Webber, Kenneth R. Shull |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Laplace's equation
Materials science business.industry Surfaces and Interfaces General Chemistry Adhesion Surface energy Surfaces Coatings and Films Contact angle Membrane Optics Mechanics of Materials Materials Chemistry Vertical displacement Wetting Composite material business Contact area Physics::Atmospheric and Oceanic Physics |
| Zdroj: | The Journal of Adhesion. 82:427-446 |
| ISSN: | 1545-5823 0021-8464 |
| DOI: | 10.1080/00218460600713576 |
| Popis: | The axisymmetric Laplace equation is solved numerically to extract contact-angle data for a flat liquid/vapor interface contacting a submerged hemispherical solid. The liquid/vapor interface is treated as a membrane, with a membrane tension equal to the surface energy of the liquid. By measuring the vertical displacement of the membrane and the projected contact area the membrane makes with the hemisphere, the contact angle and correspondingly the driving force for motion of the contact line can be measured. We show that characteristic receding and advancing contact angles can be obtained by measuring the contact radii formed upon initial contact between the interface and hemisphere and final contact just prior to detachment of the interface, respectively. Use of the technique is illustrated with a model experiment involving the contact of an air/water interface with a poly(methyl methacrylate) surface. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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