Time-connectivity superposition and the gel/glass duality of weak colloidal gels.

ABSTRACT: Colloidal gels result from the aggregation of Brownian particles suspended in a solvent. Gelation is induced by attractive interactions between individual particles that drive the formation of clusters, which in turn aggregate to form a space-spanning structure. We study this process in aluminosilicate colloidal gels through time-resolved structural and mechanical spectroscopy. Using the time-connectivity superposition principle a series of rapidly acquired linear viscoelastic spectra, measured throughout the gelation process by applying an exponential chirp protocol, are rescaled onto a universal master curve that spans over eight orders of magnitude in reduced frequency. This analysis reveals that the underlying relaxation time spectrum of the colloidal gel is symmetric in time with powe

SUBMITTER: Keshavarz B 

PROVIDER: S-EPMC8054006 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature