Bending elasticity of a curved amphiphilic film decorated anchored copolymers: a small angle neutron scattering study. Auteur(s): Appell Jacqueline, Ligoure C., Porte Grégoire (Article) Publié: Journal Of Statistical Mechanics: Theory And Experiment, vol. --- p.P08002 (2004) Texte intégral en Openaccess : Ref HAL: hal-00002158_v1 Ref Arxiv: cond-mat/0406762 DOI: 10.1088/1742-5468/2004/08/P08002 WoS: 000227301600002 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 12 Citations Résumé: 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. Commentaires: 30 June 2004 |