# Yield stress aging in attractive colloidal suspensions

Source: [Yield stress aging in attractive colloidal suspensions](<https://www.sota2.com/research/paper/68fa40eb1e209131ce8f6fba>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-25T03:02:59.590Z

Authors: Francesco Bonacci, Xavier Chateau, Eric Furst, Julie Goyon, Ana\\"el Lema\\^itre

Published: 2021-10-25T07:31:25.000Z

## Abstract

We investigate the origin of yield stress aging in semi-dense, saline, and turbid suspensions in which structural evolution is rapidly arrested by the formation of thermally irreversible roll-resisting interparticle contacts. By performing optical tweezer (OT) three-point bending tests on particle rods, we show that these contacts yield by overcoming a rolling threshold, the critical bending moment of which grows logarithmically with time. We demonstrate that this time-dependent contact-scale rolling threshold controls the suspension yield stress and its aging kinetics. We identify a simple constitutive relation between the contact-scale flexural rigidity and rolling threshold, which transfers to macroscopic scales. This leads us to establishing a constitutive relation between macroscopic shear modulus and yield stress that is generic for an array of colloidal systems.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2110.12701>)

[PDF](<https://arxiv.org/pdf/2110.12701.pdf>)