Projects per year
Abstract / Description of output
Interfacial rheology is important for understanding properties such as Pickering emulsion or foam stability. Currently, the response is measured using a probe directly attached to the interface. This can both disturb the interface and is coupled to flow in the bulk phase, limiting its sensitivity. We have developed a contactless interfacial method to perform interfacial shear rheology on liquid/liquid interfaces with no tool attached directly to the interface. This is achieved by shearing one of the liquid phases and measuring the interfacial response via confocal microscopy. Using this method we have measured steady shear material parameters such as interfacial elastic moduli for interfaces with solid-like behaviour and interfacial viscosities for fluid-like interfaces. The accuracy of this method has been verified relative to a double-wall ring
geometry. Moreover, using our contactless method we are able to measure lower interfacial viscosities than those that have previously been reported using a double-wall ring geometry. A further advantage is the simultaneous combination of macroscopic rheological analysis with microscopic structural analysis. Our analysis directly visualizes how the interfacial response is strongly correlated to the particle surface coverage and their interfacial assembly. Furthermore, we capture the evolution and irreversible changes in the particle assembly that correspond with the rheological response to steady shear.
geometry. Moreover, using our contactless method we are able to measure lower interfacial viscosities than those that have previously been reported using a double-wall ring geometry. A further advantage is the simultaneous combination of macroscopic rheological analysis with microscopic structural analysis. Our analysis directly visualizes how the interfacial response is strongly correlated to the particle surface coverage and their interfacial assembly. Furthermore, we capture the evolution and irreversible changes in the particle assembly that correspond with the rheological response to steady shear.
Original language | English |
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Pages (from-to) | 67-80 |
Number of pages | 14 |
Journal | Journal of rheology |
Volume | 67 |
Issue number | 1 |
Early online date | 8 Nov 2022 |
DOIs | |
Publication status | Published - 1 Jan 2023 |
Keywords / Materials (for Non-textual outputs)
- interfacial rheology
- liquid interfaces
- microscopy
- fluorescence
- colloids
- shear
Fingerprint
Dive into the research topics of 'Contactless Interfacial Rheology: Probing Shear at Liquid-Liquid Interfaces without an Interfacial Geometry via Fluorescence Microscopy'. Together they form a unique fingerprint.Projects
- 2 Finished
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EPSRC Centre for Doctoral Training in Condensed Matter Physics: Renewal of the CM-DTC
Muntz, I.
1/08/14 → 31/01/24
Project: Research
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EPSRC Centre for Doctoral Training in Soft Matter and Functional Interfaces
Brown, S.
1/04/14 → 31/12/22
Project: Research
Datasets
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Contactless Interfacial Rheology: Probing Shear at Liquid-Liquid Interfaces without an Interfacial Geometry via Fluorescence Microscopy
Richards, J. (Creator), Brown, S. (Creator), Rey, M. (Creator), Schofield, A. (Creator), Thijssen, J. (Creator) & Muntz, I. (Creator), Edinburgh DataShare, 28 Oct 2022
DOI: 10.7488/ds/3759, https://arxiv.org/abs/2012.07057
Dataset
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Contactless Interfacial Rheology: Example Jupyter Notebook for image analysis
Thijssen, J. (Creator), Edinburgh DataShare, 28 Oct 2022
DOI: 10.7488/ds/3761, https://arxiv.org/abs/2012.07057
Dataset