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| Volume 5, Issue 03 - 2009 |
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| 4 |
SILICA SUPPORTED METAL-CONTAINING NANOPARTICLES FOR
CHITOSAN-BASED COMPOSITES
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| Pages 70-78 |
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| A.N. VOLKOV2, O.V. POPKOV2, YU.M. BOLBUKH1, K.V. KATOK1, G.YU. YURKOV2, V.A. TERTYKH1
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1 O.O.Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164 Kyiv, Ukraine
2 A.A. Baikov Institute of Metallurgy and Materials Science of the Russian Academy of Sciences, 49 Leninsky Prospect, 119991 Moscow, Russia,
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| Received 17 July 2009; 1 October 2009 |
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| Iron oxide nanoparticles were prepared via precipitation from inverse emulsions containing silica granules with amino groups on their surface. The synthesis of silver nanoparticles was carried out via the interaction between silver nitrate (oxidant) dissolved in water and silica with amino-groups (reductant). Chitosan-based composites with silica-supported metal nanoparticles were synthesized via the dropping of polymer/filler mixture into the NaOH solution. The samples were characterized by TEM, XRD, FTIR, UV-Vis-spectroscopy and TGA. The results obtained testified that amino-silica affects the composition of Fe oxide nanoparticles. An increase of the concentration of amino-groups on silica surface leads to a decrease of the silver reduction process efficiency. The introduction of silica-supported metal nanoparticles into chitosan leads to the formation of a more ordered structure. The presence of the filler in the chitosan slows down thermal oxidation/destruction processes in the polymer matrix.
Keywords: N/A |
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