Extracting microscopic insight from transient dielectric measurements during large amplitude oscillatory shear

Noah H. Cho, Jiachun Shi, Ryan P. Murphy, John K. Riley, Simon A. Rogers, Jeffrey J. Richards*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Probing the transient microstructure of soft matter far from equilibrium is an ongoing challenge to understanding material processing. In this work, we investigate inverse worm-like micelles undergoing large amplitude oscillatory shear using time-resolved dielectric spectroscopy. By controlling the Weissenburg number, we compare the non-linear microstructure response of branched and unbranched worm-like micelles and isolate distinct elastic effects that manifest near flow reversal. We validate our dielectric measurements with small angle neutron scattering and employ sequence of physical processes to disentangle the elastic and viscous contributions of the stress.

Original languageEnglish (US)
Pages (from-to)9379-9388
Number of pages10
JournalSoft Matter
Volume19
Issue number48
DOIs
StateAccepted/In press - 2023

ASJC Scopus subject areas

  • General Chemistry
  • Condensed Matter Physics

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