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Time-dependent strength of colloidal gels

Citation:

Manley, S. ; Davidovitch, B. ; Davies, N. R. ; Cipelletti, L. ; Bailey, A. E. ; Christianson, R. J. ; Gasser, U. ; Prasad, V. ; Segre, P. N. ; Doherty, M. P. ; et al. Time-dependent strength of colloidal gels. Physical Review Letters 2005, 95, 048302. Copy at http://www.tinyurl.com/y3b8qvsu
manley2005.pdf264 KB

Abstract:

Colloidal silica gels are shown to stiffen with time, as demonstrated by both dynamic light scattering and bulk rheological measurements. Their elastic moduli increase as a power law with time, independent of particle volume fraction; however, static light scattering indicates that there are no large-scale structural changes. We propose that increases in local elasticity arising from bonding between neighboring colloidal particles can account for the strengthening of the network, while preserving network structure.

Publisher's Version

Last updated on 04/22/2021