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10 avril 2017: 1 événement

  • Séminaires Invités

    Lundi 10 avril 14:00-15:30 - Ludovic PAUCHARD - Laboratoire FAST, Orsay

    Crack Patterns in Drying Colloidal Films : Application to Art Paintings Study

    Résumé : Most coatings are made by depositing a volatile liquid that contains dispersed colloidal particles or dissolved macromolecules.
    The liquid is then evaporated until a dry film is obtained. When the wet film dries, non-uniform shrinkage occurs ; this generates tensile stresses that can eventually lead to mechanical instabilities. In particular cracks can form leading to a large variety of morphologies.
    Such structures affect the quality of the final product ; however the presence of cracks can be of great interest in the domain of conservation/restoration of paintings.
    Indeed, the crack patterns can reveal the mechanical properties of the pictorial matter that exhibit a complex system, both from a geometrical and a physicochemical point of views.
    These processes will be presented, and highlighted studying a model system.

    contact : Thomas Podgorski

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères

    En savoir plus : Séminaires Invités