CELL 231 |
| Cellulose hydrogel formed by coagulation from alkali-urea solvent provides nanofibrillar, nanoporous cellulose network, potentially useful in various ways. As an example, we describe synthesis and deposition of inorganic nanoparticles in the cellulose gel. Synthesis of metal/oxide nanoparticles from precursor solution usually requires measures to control the particle size and to prevent particle aggregation; but the same reaction performed in the nanoporous network can lead to the formation of isolated particles, which inevitably deposit on to the gel elements. We found this is exactly the case for the cellulose gel, and could prepare nanoparticles of gold, silver, and platinum, as well as those of several inorganic oxides. The metal reduction could be performed by addition of reducing agents, or by hydrothermal reduction by cellulose itself. Results of physicochemical characterization (electron microscopy, gas adsorption, and UV/VIS/IR spectroscopy) of these nanoparticles and cellulose gel will be presented. |
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Biobased Nanocomposites and Nanotechnology
8:00 AM-12:15 PM, Wednesday, April 9, 2008 Morial Convention Center -- Rm. R09, Oral
Division of Cellulose & Renewable Materials |