Equilibrium Vapor Adsorption and Capillary Force: Exact Laplace–Young Equation Solution and Circular Approximation Approaches
| Autor: | M.P. de Boer, David B. Asay, Seong H. Kim |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Capillary pressure
Materials science Capillary condensation Laplace transform Capillary action Young equation Disjoining pressure Surfaces and Interfaces General Chemistry Partial pressure Mechanics Surfaces Coatings and Films Physics::Fluid Dynamics Condensed Matter::Soft Condensed Matter Condensed Matter::Materials Science Adsorption Mechanics of Materials Materials Chemistry Physical chemistry |
| Zdroj: | Journal of Adhesion Science and Technology. 24:2363-2382 |
| ISSN: | 1568-5616 0169-4243 |
| DOI: | 10.1163/016942410x508271 |
| Popis: | The capillary adhesion force of an asperity of radius R as a function of vapor partial pressure is calculated using exact and approximate methods assuming a continuum model. The equilibrium between the capillary meniscus at the asperity and the adsorbate film on the surface is discussed through a disjoining pressure term. It is found that the two methods agree very well over a wide partial pressure range. Without taking into account the effect of the adsorbate film, the theoretical calculation results do not show the experimental partial pressure dependence of the capillary force except near the saturation vapor condition. The experimental capillary force trend with partial pressure can be explained when the presence of the adsorbate film is included in the calculation. |
| Databáze: | OpenAIRE |
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