Preparation and Applicability of EVOH/TiO2 nanocomposites

초록

The nanocomposite powders of EVOH/rutile-TiO2 (EVOH/TiO2-R) and EVOH/anatase-TiO2 (EVOH/TiO2-A) were prepared by a solution-precipitation and saponification method. Poly(ethylene-co-vinyl acetate) (EVA)/TiO2 toluene suspensions were precipitated and saponified in ethanol/KOH solution in a heterogeneous manner. As the saponification time increased, the surface of the nanocomposite particles is eroded and the larger particles are delaminated and fractured into smaller particles due to changing matrix polymer polarity. After 6h saponification time, the particle shape recovered was almost the same as the pristine TiO2 particles. Preparation, properties and applicability of the prepared nanocomposites were evaluated.