Laboratoire Léon Brillouin
UMR12 CEA-CNRS, Bât. 563 CEA Saclay
91191 Gif sur Yvette Cedex, France
The improvement of the mechanical properties of polymer films by inclusion of mineral particles is a well known industrial practice used since the end of the XIX century. A classical example is the rubber industry for which the addition of carbon black as fillers permits to increase the elastic modulus of the pneumatics. Nevertheless, the mechanisms which govern the reinforcement properties are still not completely described by experiments and theory.
More recently, the use of fillers of nanometric size and of controlled geometry like colloidal silica allowed significant advances in the understanding of these mechanisms and in the conception of innovative materials. In this context, an original approach is to try to improve and to control the specific properties of the material with an external trigger like a magnetic field. We have obtained polymer films with anisotropic mechanical properties by inclusion of magnetic particles inside the matrix which can be aggregated in a controlled way during the film processing and oriented with an external magnetic field. The orientation of the fillers during the processing condition with the field is a new approach when magnetic composites are usually exploited to modulate the mechanical properties after the synthesis. More...
• Synthesis and characterization of nano-objects › Molecular assembly and nanostructured materials › Matériaux nanocomposites nanostructurés (cristallisés et matière molle.) : de leur élaboration, à leurs propriétés.
• Laboratoire Léon Brillouin (LLB) • Leon Brillouin Laboratory (LLB)
• Materials and nanosciences, fundamental studies and applications • Equipe "Diffusion petits angles" • Small angle scattering
• Neutrons • Diffractomètres de "diffusion de neutrons aux petits angles" : PACE, PA20, PAxy, TPA • Neutrons • Small Angle Neutron Scattering (PA)