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KMID : 0604520170430040273
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Journal of the Society of Cosmetic Scientists of Korea
2017 Volume.43 No. 4 p.273 ~ p.279
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Stability of Nano-emulsions Containing Fatty Acid and Fatty Alcohol
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Cho Wan-Goo
Kim Kyung-Ah
Jang Seon-Il
Cho Byoung-Ok
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Abstract
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In this study, low viscous O/W (oil-in-water) nano-emulsion with fatty acid and fatty alcohol was prepared by phase inversion emulsification method using Tween 80 and Span 80 widely used in cosmetic products. The particle size of the nano-emulsion was increased as increasing the concentration of fatty alcohol in oil phase. Adjusting the HLB of mixed surfactants, a stable nano-emulsion with a narrow size distribution was produced. Similar change in viscosity and electrical conductivity in both systems containing fatty acid and fatty alcohol was shown in the vicinity of the phase inversion point. However, high viscosity was shown in a wide range of different aqueous fraction unlike the system consisting only oils and surfactants. The low viscous nano-emulsion with less than 100 nm droplet size was stable for one month or more at room temperature. O/W nano-emulsions with low viscosity containing fatty acid or fatty alcohol produced by low-energy emulsification method can be widely used as formulations of cosmetics.
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KEYWORD
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nano-emulsion, fatty acid, stability, fatty alcohol, Ostwald ripening
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