Rheological response of soft solid/liquid composites
Understanding a material's dissipative response is important for their use in many applications, such as adhesion or fracture resistance. In dispersions, the interplay between matrix and inclusions complicates any description. Fractional rheology is conveniently used to fit the storage and loss moduli of complex materials. In conjugation with superposition methods, they allow to better capture the behavior of materials of complex rheology. We study the rheology of soft solid/liquid composites of liquid poly(ethylene glycol) (PEG) droplets in a soft poly(dimethylsiloxane) (PDMS) matrix. We analyze the influence of the droplets through fractional rheology and a time-concentration superposition in the continuous-phase-dominated region. Viscous dissipation increases proportionally with volume fraction, independently of the frequency, whereas the elastic response is almost unchanged.
Authors
- Christophe Poulard (ORCID: https://orcid.org/0000-0001-8250-025X)
- Anniina Salonen (ORCID: https://orcid.org/0000-0002-8286-3250)
- Elina Gilbert (ORCID: https://orcid.org/0009-0003-7255-0941)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives (FR)
- Université Paris Sciences et Lettres (FR)
- Université Paris-Saclay (FR)
- Laboratoire de physique des Solides (FR)
- Sorbonne Université (FR)
- Service de Physique de l'État Condensé (FR)
- CEA Paris-Saclay (FR)
- ESPCI Paris (FR)
Publication Details
- Journal
- Soft Matter
- Published
- 2025-01-01
- DOI
- https://doi.org/10.1039/d5sm00973a
- Primary Topic
- Material Dynamics and Properties
- Type
- article
- Field-Weighted Citation Impact
- 0.00