Structure of liquid films of an ordered foam confined in a narrow channel |
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Authors: | Terriac Emmanuel Artzner Franck Moréac Alain Meriadec Cristelle Chasle Patrick Ameline Jean-Claude Ohana Jérémy Emile Janine |
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Institution: | Groupe Matière Condensée et Matériaux, UMR CNRS 6626, Université de Rennes I, Campus de Beaulieu, Rennes Cedex, France. |
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Abstract: | A bamboo foam is the simplest case of an ordered foam confined in a narrow channel. It is made of a regular film distribution, arranged perpendicularly to the channel. Our work consists of studying the structural properties of several films taken in a drained foam. X-ray experiments highlighted the equality of the equilibrium thickness for each film within a foam. The same thickness was found as by measurements of disjoining pressure isotherms, proving as well that films of a bamboo foam behave like isolated ones. The refinement of X-ray data by a simple model of specular reflectivity showed a significant variation of the electronic distribution of the surfactant layer for a common black film forwarding from one equilibrium state to another. A discussion on the organization of the surfactant molecules to the gas/liquid interface and film is proposed. |
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