Elasticity of particle-loaded liquid foams
F Gorlier1, Y Khidas, O Pitois
1Université Paris Est, Laboratoire Navier, UMR 8205 CNRS -École des Ponts ParisTech - IFSTTAR cité Descartes, 2 allée Kepler, 77420 Champs-sur-Marne, France. francois.gorlier@ifsttar.fr olivier.pitois@ifsttar.fr.
Soft Matter
|June 8, 2017
Summary
Particle size significantly impacts liquid foam elasticity. A critical particle-to-bubble ratio dictates whether solid grains or bubbles dominate the material
Area of Science:
- Materials Science
- Rheology
- Colloid Science
Background:
- Particle-laden liquid foams are crucial in manufacturing aerated materials.
- Optimizing industrial processes and material properties necessitates fundamental research into these complex mixtures.
Purpose of the Study:
- To investigate the elastic behavior of particle-loaded liquid foams.
- To determine how particle size and volume fraction influence foam elasticity.
Main Methods:
- Generation of well-controlled particle-loaded liquid foams.
- Measurement of elastic modulus and the end of the linear elastic regime.
- Analysis of particle size (6-3000 μm) and volume fraction (0-6%).
Main Results:
- A critical particle-to-bubble size ratio was identified, causing a transition in elastic behavior.
- Small size ratios: elasticity dominated by solid grains forming a granular skeleton.
- Large size ratios: bubble elasticity prevails, with large particles having minimal rheological impact.
Conclusions:
- The study reveals two distinct elastic regimes in particle-loaded foams, governed by particle-to-bubble size ratio.
- Elasticity modeling normalizes this transition, aligning with previous findings on foam drainage and solid foam mechanics.
- Morphological transitions driven by particle size influence rheology and other foam properties.
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