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Time-resolved Tomographic Quantification of the Microstructural Evolution of Ice Cream

Lee, PD; (2018) Time-resolved Tomographic Quantification of the Microstructural Evolution of Ice Cream. Materials , 11 (10) , Article 2031. 10.3390/ma11102031. Green open access

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Abstract

Ice cream is a complex multi-phase colloidal soft-solid and its three-dimensional microstructure plays a critical role in determining the oral sensory experience or mouthfeel. Using in-line phase contrast synchrotron X-ray tomography, we capture the rapid evolution of the ice cream microstructure during heat shock conditions in situ and operando, on a time scale of minutes. The further evolution of the ice cream microstructure during storage and abuse was captured using ex situ tomography, on a time scale of days. The morphology of the ice crystals and unfrozen matrix during these thermal cycles was quantified as an indicator for the texture and oral sensory perception. Our results reveal that coarsening is due to both Ostwald ripening and physical agglomeration, enhancing our understanding of the microstructural evolution of ice cream during both manufacturing and storage. The microstructural evolution of this complex material was quantified, providing new insights into the behavior of soft-solids and semi-solids, including many foodstuffs, and invaluable data to both inform and validate models of their processing.

Type: Article
Title: Time-resolved Tomographic Quantification of the Microstructural Evolution of Ice Cream
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/ma11102031
Publisher version: https://doi.org/10.3390/ma11102031
Language: English
Additional information: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
Keywords: Ice cream; Microstructure; Tomography; Ice crystals; Coarsening; Soft solids
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering
URI: http://discovery.ucl.ac.uk/id/eprint/10058551
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