Synthesis and Characterization of Surface-modified Rutile Nanoparticles And Transparent Polymer Composites Thereof |
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Authors: | Nussbaumer René J Caseri Walter Tervoort Theo Smith Paul |
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Institution: | (1) Department of Materials, Institute of Polymers, ETH Zentrum, CH-8092 Zürich, Switzerland |
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Abstract: | Nanoparticles of rutile, a crystal modification of titanium dioxide, were synthesized in strongly acidic solutions by hydrolysis of titanium tetrachloride. The particles of average diameter 2nm were coated in situ with a layer of dodecylbenzenesulfonic acid (DBSA) and isolated as a powder. Remarkably, dispersions of this powder in toluene were essentially transparent at the visible wavelengths but absorbed UV radiation over a broad wavelength range. The DBSA-coated rutile was also embedded in poly(styrene) and a poly(carbonate), resulting in polymer nanocomposites acting as visually transparent UV filters. |
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Keywords: | rutile nanoparticles nanocomposites surface-modification UV absorption visual transparency |
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