Structure of liquid films of an ordered foam confined in a narrow channel.

Emmanuel Terriac (1) , Franck Artzner (1) , Alain Moréac (1) , Cristelle Meriadec (1) , Patrick Chasle (1) , Jean-Claude Ameline (1) , Jérémy Ohana (1) , Janine Emile (2)

1 GMCM - Groupe matière condensée et matériaux
2 Granulaires - Mousses

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.

Domaines: Biophysique; Science des matériaux [cond-mat.mtrl-sci]

Emmanuel Terriac, Franck Artzner, Alain Moréac, Cristelle Meriadec, Patrick Chasle, et al.. Structure of liquid films of an ordered foam confined in a narrow channel.. Langmuir, 2007, 23 (24), pp.12055-60. ⟨10.1021/la701738z⟩. ⟨hal-00907938⟩