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Issue 35, 2017
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Influence of surface tension in the surfactant-driven fracture of closely-packed particulate monolayers

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Abstract

A phase-field model is used to capture the surfactant-driven formation of fracture patterns in particulate monolayers. The model is intended for the regime of closely-packed systems in which the mechanical response of the monolayer can be approximated as that of a linearly elastic solid. The model approximates the loss in tensile strength of the monolayer with increasing surfactant concentration through the evolution of a damage field. Initial-boundary value problems are constructed and spatially discretized with finite element approximations to the displacement and surfactant damage fields. A comparison between model-based simulations and existing experimental observations indicates a qualitative match in both the fracture patterns and temporal scaling of the fracture process. The importance of surface tension differences is quantified by means of a dimensionless parameter, revealing thresholds that separate different regimes of fracture. These findings are supported by newly performed experiments that validate the model and demonstrate the strong sensitivity of the fracture pattern to differences in surface tension.

Graphical abstract: Influence of surface tension in the surfactant-driven fracture of closely-packed particulate monolayers

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Publication details

The article was received on 23 Jun 2017, accepted on 29 Jul 2017 and first published on 31 Jul 2017


Article type: Paper
DOI: 10.1039/C7SM01245D
Citation: Soft Matter, 2017,13, 5832-5841
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    Influence of surface tension in the surfactant-driven fracture of closely-packed particulate monolayers

    C. Peco, W. Chen, Y. Liu, M. M. Bandi, J. E. Dolbow and E. Fried, Soft Matter, 2017, 13, 5832
    DOI: 10.1039/C7SM01245D

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