Preparation of water powders by the adsorption of hydrophobic nanoparticles at the surface of hydrated starch particulates

► Water powders were prepared by the adsorption of hydrophobic nanoparticles at the surface of hydrated starch particulates. ► Hydrophobicity and size of nanoparticles, amount of water phase influenced the formation of water powders. ► Water powders can deliver water to skin via solid form.