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Gunther A.,Lehrstuhl fur Feststoff und Grenzflachenverfahrenstechnik | Wirth K.-E.,Lehrstuhl fur Feststoff und Grenzflachenverfahrenstechnik
Chemie-Ingenieur-Technik | Year: 2012

The atomization of superheated liquids utilizes thermal energy for partial evaporation of flow media, by this enhancing the spray disintegration. The degree of evaporation and the generation of big droplets is a function of the nozzle geometry. By analyzing mass fluxes and by application of optical measurement techniques geometry-dependent modifications of flow characteristics and spray morphology are investigated. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Distaso M.,Lehrstuhl fur Feststoff und Grenzflachenverfahrenstechnik | Klupp Taylor R.N.,Lehrstuhl fur Feststoff und Grenzflachenverfahrenstechnik | Taccardi N.,Lehrstuhl fur Chemische Reaktionstechnik | Wasserscheid P.,Lehrstuhl fur Chemische Reaktionstechnik | Peukert W.,Lehrstuhl fur Feststoff und Grenzflachenverfahrenstechnik
Chemistry - A European Journal | Year: 2011

Polymers and coordinating solvents have been shown to serve as templating agents to assist the precipitation of ZnO nanoparticles and address their morphology. In this work we show for the first time that a difference in the coordination strength between the polymer (poly-N-vinylpyrrolidone (PVP)) and the two ZnII precursor salts (nitrate and acetate) is able to promote or suppress the formation of mesocrystalline structures and even more importantly to tune their three-dimensional organization. On the basis of FTIR and 13C NMR spectroscopic studies, we propose that not only the polymer (PVP) but also the solvent (DMF) play a key role as directing agents. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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