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Archer, A.J., Goddard, B.D., Sibley, D.N., Rawlings, J.T., Broadhurst, R., Ouali, F.F. and Fairhurst, D.J., 2024. Experimental and theoretical bulk phase diagram and interfacial tension of ouzo. Soft Matter, 20 (30), pp. 5859-5888. ISSN 1744-683X
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Abstract
Ouzo is a well-known drink in Mediterranean countries, with ingredients water, alcohol and trans-anethole oil. The oil is insoluble in water, but completely soluble in alcohol, so when water is added to the spirit, the available alcohol is depleted and the mixture exhibits spontaneous emulsification. This process is commonly known as the louche or ouzo effect. Although the phase boundaries of this archetypal ternary mixture are well known, the properties of coexisting phases have not previously been studied. Here, we present a detailed experimental investigation into the phase behaviour, including tie-lines connecting coexisting phases, determination of the critical point (also called the plait point in ternary systems) and measurements of the surface tension and density for varying alcohol concentrations. Additionally, we present a theory for the thermodynamics and phase diagram of the system. With suitable selection of the interaction parameters, the theory captures nearly all features of the experimental work. This simple model can be used to determine both bulk and non-uniform (e.g. interfacial) properties, paving the way for a wide range of future applications of the model to ternary mixtures in general. We show how our accurate equilibrium phase diagram can be used to provide improved understanding of non-equilibrium phenomena.
| Item Type: | Journal article | ||||||
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| Publication Title: | Soft Matter | ||||||
| Creators: | Archer, A.J., Goddard, B.D., Sibley, D.N., Rawlings, J.T., Broadhurst, R., Ouali, F.F. and Fairhurst, D.J. | ||||||
| Publisher: | Royal Society of Chemistry (RSC) | ||||||
| Date: | 26 April 2024 | ||||||
| Volume: | 20 | ||||||
| Number: | 30 | ||||||
| ISSN: | 1744-683X | ||||||
| Identifiers: |
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| Rights: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. | ||||||
| Divisions: | Schools > School of Science and Technology | ||||||
| Record created by: | Jonathan Gallacher | ||||||
| Date Added: | 19 Nov 2024 09:57 | ||||||
| Last Modified: | 19 Nov 2024 09:57 | ||||||
| URI: | https://irep.ntu.ac.uk/id/eprint/52607 |
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