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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.

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

Journal Article Type Article
Acceptance Date Jan 3, 2012
Online Publication Date Jan 6, 2012
Publication Date Jan 24, 2012
Publicly Available Date Mar 29, 2024
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
DOI https://doi.org/10.1021/la204811c
Keywords Spectroscopy; Electrochemistry; General Materials Science; Surfaces and Interfaces; Condensed Matter Physics
Public URL https://hull-repository.worktribe.com/output/424092
Publisher URL https://pubs.acs.org/doi/10.1021/la204811c