Compressive yield stress of depletion gels from stationary centrifugation profiles
Abstract
By means of analytical centrifugation, we study the compression of colloidal gels where attractive forces between the particles are induced by a surfactant, acting as a depletion agent. The approximate pressure sustained by gels with different strength at different centrifugal acceleration is measured from the steady-state profiles of the transmitted intensity, using a conventional method. In the particular case in which the suspension is refractive-index–matched and the profile is directly related to the particle concentration, the equation of state of the gel can be obtained up to the random close-packing limit, highly extending current experimental and numerical data available.
Date
Sep 13, 2018 — Sep 14, 2018
Location
University of Padua
Via Marzolo 8, Padua, 35131
