Brushlike interactions between thermoresponsive microgel particles
- Scheffold, Frank Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
- Díaz-Leyva, Pedro Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
- Reufer, Mathias Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Adolphe Merkle Institute, University of Fribourg, Switzerland
- Braham, Nasser Ben Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
- Lynch, Iseult School of Chemistry and Chemical Biology, University College Dublin, Ireland
- Harden, James L. Department of Physics, University of Ottawa, Canada
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26.03.2010
Published in:
- Physical Review Letters. - 2010, vol. 104, no. 12, p. 128304
English
Using a simplified microstructural picture we show that interactions between thermosensitive microgel particles can be described by a polymer brushlike corona decorating the dense core. The softness of the potential is set by the relative thickness L0 of the compliant corona with respect to the overall size of the swollen particle R. The elastic modulus in quenched solid phases derived from the potential is found to be in excellent agreement with diffusing wave spectroscopy data and mechanical rheometry. Our model thus provides design rules for the microgel architecture and opens a route to tailor rheological properties of pasty materials.
- Faculty
- Faculté des sciences et de médecine
- Department
- Département de Physique
- Language
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 20299
- DOI 10.1103/PhysRevLett.104.128304
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301560
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