Relaxation dynamics at different time scales in electrostatic complexes: Time-salt superposition

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Abstract

In this Letter we show that in the rheology of electrostatically assembled soft materials, salt concentration plays a similar role as temperature for polymer melts, and as strain rate for soft solids. We rescale linear and nonlinear rheological data of a set of model electrostatic complexes at different salt concentrations to access a range of time scales that is otherwise inaccessible. This provides new insights into the relaxation mechanisms of electrostatic complexes, which we rationalize in terms of a microscopic mechanism underlying salt-enhanced activated processes
Original languageEnglish
Article number208301
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number20
DOIs
Publication statusPublished - 2010

Keywords

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