title: Brushlike interactions between thermoresponsive microgel particles.
abstract: 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.
authors.affiliation: Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, 1700 Fribourg, Switzerland. Frank.Scheffold@unifr.ch
authors.forename: Frank
authors.initials: F
authors.lastname: Scheffold
authors.forename: Pedro
authors.initials: P
authors.lastname: Díaz-Leyva
authors.forename: Mathias
authors.initials: M
authors.lastname: Reufer
authors.forename: Nasser
authors.initials: N
authors.lastname: Ben Braham
authors.forename: Iseult
authors.initials: I
authors.lastname: Lynch
authors.forename: James L
authors.initials: JL
authors.lastname: Harden