Paper Number
VP60 

Session
Pre-recorded Flash Presentations (virtual)

Title
Colloidal gelation in foam: Probing the impact of elastic continuous phases on foam mechanics

Presentation Date and Time
All Week (Asynchronous) Any Time

Track / Room
Pre-recorded Presentation / Virtual

Authors (Click on name to view author profile)

1. Mikhailovskaya, Alesya (University of Paris Saclay)
2. Trappe, Véronique (Fribourg University, Department of Physics)
3. Salonen, Anniina (University Paris Saclay)

Author and Affiliation Lines (in printed abstract book)
Alesya Mikhailovskaya¹, Véronique Trappe² and Anniina Salonen^1
1University Paris Saclay, Orsay, France; ²Department of Physics, Fribourg University, Fribourg, Fribourg 1700, Switzerland

Speaker / Presenter 
Salonen, Anniina

Keywords
colloids; foams; gels

Text of Abstract
We explore the evolution of the mechanical properties of a foam containing colloidal particles that undergo a sol-gel transition. This enables us to investigate the effect of an elastic continuous phase on foam mechanics, probing a wide range of elastic moduli within a single experiment. Right after production of the foam the mechanics is controlled by the elasticity of the bubbles, while the contributions of the continuous phase become dominant as the colloidal particles form a gel. Remarkably, we find that we can describe the entire evolution of the foam mechanics by considering additive elastic contributions of the coarsening bubbles and the gelling continuous phase, provided that we assume that gelation occurs significantly faster in the foam than in the bulk.