Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2004-06-30
Journal of Statistical Mechanics: Theory and experiment -- (2004) P08002
Physics
Condensed Matter
Soft Condensed Matter
30 June 2004
Scientific paper
10.1088/1742-5468/2004/08/P08002
Microemulsion droplets (oil in water stabilized by a surfactant film) are progressively decorated with increasing amounts of poly ethylene- oxide (PEO) chains anchored in the film by the short aliphatic chain grafted at one end of the PEO chain . The evolution of the bending elasticity of the surfactant film with increasing decoration is deduced from the evolution in size and polydispersity of the droplets as reflected by small angle neutron scattering. The optimum curvature radius decreases while the bending rigidity modulus remains practically constant. The experimental results compare well with the predictions of a model developed for the bending properties of a curved film decorated by non-adsorbing polymer chains, which takes into account, the finite curvature of the film and the free diffusion of the chains on the film.
Appell Jacqueline
Ligoure Christian
Porte Gregoire
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