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Oil Powders and Gels from Particle-Stabilized Emulsions

Adelmann, Horst; Binks, Bernard P.; Mezzenga, Raffaele

Authors

Horst Adelmann

Raffaele Mezzenga



Abstract

We report on the use of silica particle-stabilized oil-in-water emulsions as a template for the preparation of oil powders and gels obtained in a single step by either slow or rapid evaporation of water using freeze-drying or spray-drying, respectively. Using olive oil and partially hydrophobic fumed silica nanoparticles, an oil powder containing nearly 90 wt % oil can be formed by spray-drying, which shows no sign of oil leakage over several months. Upon slow evaporation of water by freeze-drying, a transparent oil gel with oil content as high as 98 wt % can be formed, in which the silica particles form a space-filling network thickening the oil. Comparisons are made throughout with a typical surfactant-stabilized emulsion which does not produce oil powders or gels.

Journal Article Type Article
Publication Date Jan 24, 2012
Journal LANGMUIR
Print ISSN 0743-7463
Electronic ISSN 1520-5827
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 28
Issue 3
Pages 1694-1697
APA6 Citation Adelmann, H., Binks, B. P., & Mezzenga, R. (2012). Oil Powders and Gels from Particle-Stabilized Emulsions. Langmuir : the ACS journal of surfaces and colloids, 28(3), 1694-1697. https://doi.org/10.1021/la204811c
DOI https://doi.org/10.1021/la204811c
Keywords Spectroscopy; Electrochemistry; General Materials Science; Surfaces and Interfaces; Condensed Matter Physics
Publisher URL https://pubs.acs.org/doi/10.1021/la204811c
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