Life and death of colloidal bonds control the rate-dependent rheology of gels.

ABSTRACT: Colloidal gels exhibit rich rheological responses under flowing conditions. A clear understanding of the coupling between the kinetics of the formation/rupture of colloidal bonds and the rheological response of attractive gels is lacking. In particular, for gels under different flow regimes, the correlation between the complex rheological response, the bond kinetics, microscopic forces, and an overall micromechanistic view is missing in previous works. Here, we report the bond dynamics in short-range attractive particles, microscopically measured stresses on individual particles and the spatiotemporal evolution of the colloidal structures in different flow regimes. The interplay between interparticle attraction and hydrodynamic stresses is found to be the key to unraveling the physical und

SUBMITTER: Nabizadeh M 

PROVIDER: S-EPMC8277829 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature