NANOPARTICLES AND NANOWIRES OF ZNO WITH ORGANOPHILIC SURFACES AND THEIR NANOCOMPOSITES WITH POLY(METHYL METHACRYLATE)

摘要

The subject of the patent are nanoparticles and nanowires of zinc oxide - ZnO with organophilic surfaces, synthesized in various diols in the presence para - toluene sulfonic acid (p-TsOH) and their nanocomposites with polymethyl methacrylate (PMMA), prepared without additional surface modification of ZnO particles. The preparation procedure of nano ZnO proceeds by hydrolysis of the zinc compound in the presence of catalyst, para - toluene sulfonic acid, in various diols and comprises the following steps: mixing and sonication of the solution from 5 to 60 min., heating of the solution from 30 to 90 min. at temperatures from 100 to 300 °C; sedimentation of the zinc oxide compound up to 24 hours; separation of the suspension from the precipitate, washing of the suspension; drying of the compound. Preparation of nanocomposites composed of methacrylic or acrylic polymer and of unmodified nano ZnO is comprised of the following steps: preparation of the mixture of methacrylic or acrylic monomer, initiator and of zinc (II) oxide, mixing and sonication from 5 - 60 min.; optional partial polymerization of MMA; optional addition of initiator from 0.1 to 40 % once again; transfer into the mold and polymerization at temperatures between 35 and 80 °C; cooling of the polymer and separation from the mold.