Hybrid powder of halloysite nanotube and light-scattering nanoparticle, method for preparing the same, and UV-screening cosmetic composition containing the same as active ingredient
The present invention provides a hybrid powder of halloysite nanotubes and light-scattering nanoparticles, a method for preparing the same, and a UV-screening cosmetic composition containing the same as an active ingredient. The hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention, in which the light-scattering nanoparticles are loaded into the halloysite nanotubes, can prevent the light-scattering nanoparticles from penetrating the skin, which minimizes side effects, and has excellent UV-screening effect. Thus, the hybrid powder of halloysite nanotubes and light-scattering nanoparticles according to the present invention can be effectively used as a UV-screening cosmetic composition.
1. A method for preparing a hybrid powder of halloysite nanotubes and TiO 2 light-scattering nanoparticles, comprising:
(2-1) adding a halloysite nanotube powder to titanium tetraisopropoxide (TTIP) solution, vacuum pulling the resulting solution, and collecting a hybrid powder by centrifugation; and
(2-2) dispersing the hybrid powder collected in step (2-1) in a hydrochloric acid solution, stirring the resulting solution at 40 to 90° C. for 0.5 to 5 hours, cooling the resulting solution to room temperature, collecting the hybrid powder by centrifugation, and washing and drying the collected hybrid powder.