Surface modification of silica nanoparticles by UV-induced graft polymerization of methyl methacrylate |
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Authors: | Kim Sooyeon Kim Eunhye Kim Sungsoo Kim Woosik |
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Institution: | Department of Chemical Engineering, College of Environmental and Applied Chemistry, Kyung Hee University, Yongin, Gyeonggi-Do 447-701, Republic of Korea. |
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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. |
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