title: Surface modification of silica nanoparticles by UV-induced graft polymerization of methyl methacrylate.
abstract: In this study we modified the surface of silica nanoparticles with methyl methacrylate by UV-induced graft polymerization. It is a surface-initiated polymerization reaction induced by ultraviolet irradiation. The resulting organic-inorganic nanocomposites were near-monodisperse and fabricated without homopolymerization of the monomer. Substantial increase in mean particle size was observed by SEM image analysis after UV-induced grafting of methyl methacrylate onto pure silica particles. FT-Raman spectroscopy and X-ray photoelectron spectroscopy studies of these materials revealed the successful grafting of methyl methacrylate onto the silica surface. The formation of a covalent bond between the grafted PMMA chains and silica surface was indicated by FT-Raman spectra. Thermogravimetric analysis of the PMMA-grafted silica particles indicated the polymer contents in good agreement with SEM photographs.
authors.affiliation: Department of Chemical Engineering, College of Environmental and Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi-Do 447-701, Republic of Korea.
authors.forename: Sooyeon
authors.initials: S
authors.lastname: Kim
authors.forename: Eunhye
authors.initials: E
authors.lastname: Kim
authors.forename: Sungsoo
authors.initials: S
authors.lastname: Kim
authors.forename: Woosik
authors.initials: W
authors.lastname: Kim
mesh_terms: D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects; D010316:Particle Size; D019904:Polymethyl Methacrylate / Q000138:chemical synthesis* / Q000737:chemistry / Q000528:radiation effects*; D012822:Silicon Dioxide / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D013818:Thermogravimetry; D014466:Ultraviolet Rays
chemical_list: D012822:Silicon Dioxide; D019904:Polymethyl Methacrylate