Time-dependent strength of colloidal gels
  • S. Manley , Harvard University
  • Benny Davidovitch , Harvard University
  • Neil R. Davies , Harvard University
  • L. Cipelletti , Universite Montpellier II
  • A. E. Bailey , Harvard University
  • Rebecca J. Christianson , Olin College of Engineering
  • U. Gasser , University of Konstanz
  • V. Prasad , University of California - Santa Barbara
  • P. N. Segre , Harvard University
  • M. P. Doherty , NASA Glenn Research Center
  • S. Sankaran , NASA Glenn Research Center
  • A. L. Jankovsky , NASA Glenn Research Center
  • B. Shiley , Zin Technologies, Inc.
  • J. Bowen , Zin Technologies, Inc.
  • J. Eggers , Zin Technologies, Inc.
  • C. Kurta , Zin Technologies, Inc.
  • T. Lorik , Zin Technologies, Inc.
  • D. A. Weitz , Harvard University
Article
Document Type
Article
Publication Date
7-22-2005
Disciplines
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.

Comments

© (2005) American Physical Society. The article appeared in Physical Review Letters, Vol 95, and may be found at http://prl.aps.org/abstract/PRL/v95/i4/e048302.

Citation Information
S. Manley, Benny Davidovitch, Neil R. Davies, L. Cipelletti, et al.. "Time-dependent strength of colloidal gels"
Available at: http://works.bepress.com/rebecca_christianson/9/