Binary Polymer Systems, Stable Inorganic Nanoparticles

Preparation of namomatrials using polymer as a stabilization has attracted much attention. In this paper, dualistic polymers stabilized namomatrials were prepared. The grafting copolymer of methyl methacrylate with gelatin and the solution of PEG and gelatin were used as dualistic polymer.The grafting copolymerization of methyl methacrylate with gelatin was carried out using potassium persulfate/sodium bisulfite initiation system. The influence of reaction conditions on the grafting efficiency of the obtained grafting product was investigated. The structure and morphology of the obtained powder was characterized by means of infrared(IR), scanning electron microscopy(SEM) and thermal gravimetric analysis(TG). Nanosized AgBr/copolymer composite and nanosized Cu₂O /copolymer composite were prepared in the latex of the grafting copolymer The structure and morphology of these composites were characterized by means of TEM, SEM, X-ray powder diffraction (XRD) and TG. The results indicate that the nanoparticles were dispersed in the copolymer uniformly. The reaction mechanic and the electrochemical property of nanosized AgBr/copolymer composite were discussed on the basis of experiment results. The composite can be used as material of sensor and memory.In addition, Ag₂O nanoparticles have been prepared in a solution of gelatin and poly ethylene glycol(PEG). The results indicate that the obtained spherical Ag₂O nanoparticles have a monodisperse diameter range less than 10 nm. The decomposition temperature of as prepared Ag₂O was much lower than that of macroscopical one. The concomitant polymer significantly influenced the decomposition temperature of Ag₂O.