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KMID : 0604520100360010001
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Journal of the Society of Cosmetic Scientists of Korea
2010 Volume.36 No. 1 p.1 ~ p.16
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Cosmetic Emulsions: Stabilization by Particles
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Cho Wan-Goo
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Abstract
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The preparation and properties of emulsions stabilized by the adsorption of solid particles at the oil-water interface are reviewed. Comparison is made with the behaviour of surfactant-stabilized emulsions. Many of the properties of Pickering emulsions are attributed to the large free energy of adsorption for particles. The main differences is due to the irreversible adsorption of particles to the interface. Phase inversion from w/o (water-in-oil) to o/w (oil-in-water) can be brought by increasing the volume fraction of water. Hydrophilic particles tend to form o/w emulsion whereas hydrophobic particles form w/o emulsion. The contact angle at the oil-water interface is main parameter to decide the emulsion type. The aspects of stability of Pickering emulsions are in contrast to general emulsions in some points. The possibility using Pickering emulsions for cosmetics is also proposed.
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KEYWORD
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pickering emulsion, nano-particle, cosmetics, wettability, contact angle
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