Jump to main content
Jump to site search

Issue 32, 2013
Previous Article Next Article

Disentangling glass and jamming physics in the rheology of soft materials

Author affiliations

Abstract

The shear rheology of soft particle systems becomes complex at large density because crowding effects may induce a glass transition for Brownian particles or a jamming transition for non-Brownian systems. Here we successfully explore the hypothesis that the shear stress contributions from glass and jamming physics are ‘additive’. We show that the experimental flow curves measured in a large variety of soft materials (colloidal hard spheres, microgel suspensions, emulsions, aqueous foams) as well as numerical flow curves obtained for soft repulsive particles in both thermal and athermal limits are well described by a simple model assuming that glass and jamming rheologies contribute linearly to the shear stress, provided that the relevant scales for time and stress are correctly identified in both sectors. Our analysis confirms that the dynamics of colloidal hard spheres is uniquely controlled by glass physics while aqueous foams are only sensitive to jamming effects. We show that for micron-sized emulsions both contributions are needed to successfully account for the flow curves, which reveal distinct signatures of both phenomena. Finally, for two systems of soft microgel particles we show that the flow curves are representative of the glass transition of colloidal systems, and deduce that microgel particles are not well suited to studying the jamming transition experimentally.

Graphical abstract: Disentangling glass and jamming physics in the rheology of soft materials

Back to tab navigation

Publication details

The article was received on 18 Feb 2013, accepted on 13 May 2013 and first published on 20 May 2013


Article type: Highlight
DOI: 10.1039/C3SM50503K
Citation: Soft Matter, 2013,9, 7669-7683
  •   Request permissions

    Disentangling glass and jamming physics in the rheology of soft materials

    A. Ikeda, L. Berthier and P. Sollich, Soft Matter, 2013, 9, 7669
    DOI: 10.1039/C3SM50503K

Search articles by author

Spotlight

Advertisements