| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 593631 | Colloids and Surfaces A: Physicochemical and Engineering Aspects | 2013 | 5 Pages |
•An experimental method is presented for the interfacial tension between two liquids.•The bubble contour is evaluated by image processing.•A force balance is used for the interfacial tension.•The Laplace equation relating internal pressure and curvature is not involved.
The interfacial tension between silicone oil and water is measured in the temperature range 18–35 °C. A novel method is used which promises prospects for the application to other liquid/liquid systems. The method is based on digital image processing of the contour of a pendant drop in combination with a pressure measurement. In contrast to existing algorithms axisymmetric drop shape analysis (ADSA) relying on iterative solutions of the Laplace equation the interfacial tension is obtained without Laplace from a force balance yielding an explicit expression for the interfacial tension.
Graphical abstractThe interfacial tension between silicon oil (AK20) and water measured by a novel contour method not using the Laplace equation.Figure optionsDownload full-size imageDownload as PowerPoint slide
