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August 19, 2025Langmuir

Rheological Behavior of Colloidal Silica Dispersion: Irreversible Aging and Thixotropy

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Authors

VKVivek KumarYJYogesh M. Joshi

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Overview

This research reveals hyperaging dynamics and nonmonotonic flow behavior in colloidal silica dispersions, indicating thixotropic properties.

Key Points

  • The aging behavior of colloidal silica dispersion shows notable changes in yield stress and viscosity over time, leading to hyperaging effects.
  • Yield stress and elastic modulus exhibit time evolution, with relaxation time increasing significantly as the dispersion ages.
  • The study utilizes a thixotropic structural kinetic model to explain flow behaviors, indicating a complex interplay between shear and aging dynamics.
  • Physical aging becomes irreversible over longer durations, with interparticle bonds strengthening and impacting viscosity and yield stress.

Cite This Study

Kumar et al. (2025) studied this question.

synapsesocial.com/papers/68af4766ad7bf08b1ead4aabhttps://doi.org/10.1021/acs.langmuir.5c02136
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