Abstract
Powders can stabilize emulsions by adsorbing the liquid-liquid interfaces. The phenomenon is also predicted that powders can adsorb and stabilize the ineterfaces between liquid and gas. So, a Powder emulsion is developed with the functional powders that have the optimized balance of hydrorepellency due to fractal surface and hydrophilicity due to free hydroxyl groups. By using the powders, we created a new powder technology that can encapsulate a large quantity of water softly. In this study we explain why the cosmetic is possible. At first we focused on hydrophilic and hydrophobic balance of nano-sized powder surface. We also looked into how the powders encapsulated water by observed with wet-SEM and how the encapsulated water is stabilized by measuring water mobility with 17O-NMR. Finally, we would introduce the application with many unique characteristics : the powder can change into liquid by application of friction.
