| 초록 |
Zinc Oxide (ZnO) nanoparticles (NPs) integrated on the surface of cellulose nanofibril (CNF) were prepared by a sol-gel reaction and its size was controlled under various synthesis conditions. ZnO-CNF hybrid as a sunscreen has merits such as skin non-penetration of ZnO nanoparticle, enhanced water solubility or dispersibility, reduced photodamage of the skin from ZnO-mediated free radical formations (photocatalytic effect). Especially, photocatalytic effect of ZnO in water was found to be completely reduced by the hybridization, where it was measured by decolouration degree of an organic dye under UV irradiation. Integrated amount of ZnO on the CNF was obtained to be up to 78 wt% of the hybrid, which indicates that the hybridization was cost-effective as for a sunscreen with high sun protection impact factor. |
