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Stability of W/O Nanoemulsions with Low Viscosity Prepared by PIC Method
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 Title & Authors
Stability of W/O Nanoemulsions with Low Viscosity Prepared by PIC Method
Cho, Wan Goo;
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In this study, water-in-oil (W/O) nanoemulsions of water/Span 80-Nikkol BL 25/oil system were prepared by the PIC method at elevated temperature. This method allows the formation of finely dispersed W/O nanoemulsions with low viscosity in this system. However, macroemulsions rather than nanoemulsions were prepared by PIC method at room temperature. As a result of the significant change of interfacial tension with temperature, the emulsion droplet size decreases from to 100 nm with the increase in temperature from to . The droplet size of nanoemulsions prepared at was in the range of 50 ~ 200 nm and the internal phase content could reach as high as 15 wt%. The most stable nanoemulsion was formed in the vicinity of 7.0 of optimum HLB of the emulsifier mixture. The obtained nanoemulsions were stable without obvious change in droplet size in one month. This study provides valuable information for optimizing the formation of W/O nanoemulsions with low viscosity. These results suggest that W/O nanoemulsions of low viscosity could be useful for cosmetics with soft feeling.
nanoemulsion;water-in-oil;low viscosity;stability;PIC;
 Cited by
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