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Synthesis and Characterization of Surface-modified Rutile Nanoparticles And Transparent Polymer Composites Thereof
Authors:Nussbaumer  René J  Caseri  Walter  Tervoort  Theo  Smith  Paul
Institution:(1) Department of Materials, Institute of Polymers, ETH Zentrum, CH-8092 Zürich, Switzerland
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 2thinspnm 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.
Keywords:rutile  nanoparticles  nanocomposites  surface-modification  UV absorption  visual transparency
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