Oil Powders and Gels from Particle-Stabilized Emulsions

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

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
• 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