Accueil > La Recherche > Axes & Equipes > Matière Molle & Verres > Equipe : Matière Molle > Thème : Jamming, plasticity and material failure
The constituents of jammed and glassy soft materials are so densely packed and/or so tightly bound that their microscopic dynamics are orders of magnitude slower than in dilute systems. Examples of such materials include, among others, concentrated colloidal suspensions or emulsions, polymer or particle gels, surfactant phases, foams. Our research focuses on the spontaneous (e.g. due to thermal energy) dynamics of these materials, as well as on their behavior in response to an external drive, e.g. a mechanical or thermal forcing.
We leverage on our expertise in the formulation of well-defined supramolecular systems with original properties, combined with home-designed devices allowing a thorough characterization of the structure and dynamics of the system and a fine control of the imposed drive.
– MATERIAL FAILURE, click !
– THE GLASS TRANSITION OF SOFT COLLOIDS, click !
– VISCOUS, VISCOELASTIC, AND ELASTIC SHEETS, click !
Fractures propagating in a dense corn starch suspension. The suspension is confined between two parallel plates separated by a thin gap. The fracture is caused by the fast injection of solvent, at a point about 3 cm from the field of view. The field of view is about 1 cm2. The sample is illuminated using laser light : the temporal fluctuations of the resulting speckle patter carry information on the microscopic dynamics and the velocity field. By Frederic Lechenault, Serge Mora and Luca Cipelletti.
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions Auteur(s): Divoux Thibaut, Agoritsas Elisabeth, Aime S., Barentin Catherine, Barrat Jean-Louis, Berthier L., Bi Dapeng, Biroli Giulio, Bonn Daniel, Bourrianne Philippe, Bouzid Mehdi, del Gado Emanuela, Delanoë-Ayari Hélène, Farain Kasra, Fielding Suzanne, Fuchs Matthias, van der Gucht Jasper, Henkes Silke, Jalaal Maziyar, Joshi Yogesh, Lemaître Anaël, Leheny Robert, Manneville Sébastien, Martens Kirsten, Poon Wilson, Popović Marko, Procaccia Itamar, Ramos L., Richards James, Rogers Simon (Article) Publié: Soft Matter, vol. 20 p.6868-6888 (2024) Texte intégral en Openaccess : |
Water-Driven Sol–Gel Transition in Native Cellulose/1-Ethyl-3-methylimidazolium Acetate Solutions Auteur(s): Mohamed Yunus Roshan Akdar, Koch Marcus, Dieudonne-George P., Truzzolillo D., Colby Ralph, Parisi Daniele (Article) Publié: Acs Macro Letters, vol. 13 p.219-226 (2024) |
A threshold model of plastic waste fragmentation: new insights into the distribution of microplastics in the ocean and its evolution over time Auteur(s): George M., Nallet Frédéric, Fabre P. (Article) Publié: Marine Pollution Bulletin, vol. 199 p.116012 (2024) Texte intégral en Openaccess : |
Material failure
1. Dynamic precursors of material failure in the creep of a colloidal gel. People involved : S. Aime (PhD), C. Ligoure (Pr), L. Ramos (DR CNRS), L. Cipelletti (Pr)
We study (…)
The glass transition of soft colloids
People involved : A.-M. Philippe (Postdoc), D. Truzzolillo (CR CNRS), L. Berthier (DR CNRS), L. Cipelletti (Pr).
We use a combination of light and X-ray (…)
Viscous, viscoelastic, and elastic sheets People involved : S. Arora (PhD), C. Ligoure (Pr.), L. Ramos (DR. CNRS) T. Phou (IE), J-M Fromental (IE), collaboration with S. Mora (Pr - LMGC)
The (…)