Hofmann, Matthias J. and Weikl, Robert and Motschmann, Hubert and Koper, Ger J. M. (2015) Impact of the Imaginary Part of the Surface Dilatational Modulus on the Splashing Behavior of Drops. LANGMUIR, 31 (6). pp. 1874-1878. ISSN 0743-7463,
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The relation between the complex surface dilatational modulus E of aqueous surfactant solutions and the splashing behavior of their drops on liquid surfaces was investigated. The surface dilatational modulus E of selected surfactant systems has been determined in the frequency range of 3 to 500 Hz by means of the oscillating bubble technique. According to the functional dependence of the phase phi of the complex modulus E(omega, c)exp[i phi?(omega, c)] at higher frequencies, adsorption layers can be classified as surface elastic or surface viscoelastic. Each behavior shows pronounced differences in drop splashing experiments. The impact of a drop on the liquid was monitored with a high-speed camera. The splash of a drop is a rather complex phenomenon, so the focus of this article is to establish a relationship between the imaginary part of the surface dilatational modulus E and the height of the drop rebound. These findings may be of importance for formulations in crop protection, introducing a chemical way to influence the impact of drops on solid and liquid interfaces.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | RHEOLOGY; BENEFITS; FOAM; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Hubert Motschmann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 26 Jul 2019 06:07 |
| Last Modified: | 26 Jul 2019 06:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5957 |
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