Journal
LANGMUIR
Volume 30, Issue 2, Pages 496-500Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la4042056
Keywords
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Funding
- JSPS KAKENHI [12018977]
- Cosmetology Research Foundation
- Grants-in-Aid for Scientific Research [24750139] Funding Source: KAKEN
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A powdered oil-in-water (o/w) emulsion is a dispersed system in which the continuous phase of a particle-stabilized o/w emulsion is dispersed in air by encapsulating the water globules with hydrophobic particles. During their preparation, oil droplets in water globules are forced to move because of high-shear mixing, leading to creaming of the oil droplets and possible wetting of the hydrophobic particles with the oil droplets, which induces destabilization. To prepare powdered o/w emulsions efficiently, the extent of creaming of the oil droplets has to be suppressed. We describe how to achieve this by mixing two oils of different densities and preparing powdered o/w emulsions from oil mixtures exhibiting a decreasing density difference with water. As the extent of creaming is reduced, enhanced stabilization of the powdered emulsions occurs.
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