Dynamical shapes of droplets of cyclodextrin/surfactants solutions
We present a series of experiments with droplets of aqueous cyclodextrin-surfactant solutions, in which the volume is reduced after the equilibrium spherical shape is reached. The fnal shape of the drop after this perturbation is found to be dependent on the concentration of inclusion complexes in t...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad de Barcelona |
| Repositorio: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/186036 |
| Acceso en línea: | https://hdl.handle.net/2445/186036 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciclodextrines Tensió superficial Agents tensioactius Cyclodextrins Surface tension Surface active agents |
| Sumario: | We present a series of experiments with droplets of aqueous cyclodextrin-surfactant solutions, in which the volume is reduced after the equilibrium spherical shape is reached. The fnal shape of the drop after this perturbation is found to be dependent on the concentration of inclusion complexes in the bulk of the solution. These inclusion complexes are formed by two cyclodextrin molecules and one surfactat molecule. We propose a model to describe these dynamical processes. Dipole-dipole interactions on the surface of the drop trigger a competition between water surface tension and dipole-dipole interaction energies. The results of the model reproduce the spherical and rod-like shapes found in the experiments. |
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