Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 4: Nanoparticles, Nanocrystals and Composites I
CPP 4.5: Vortrag
Montag, 7. März 2016, 10:30–10:45, H41
Halloysites stabilized Pickering-emulsions: Is this the way to green chemistry? — •Dmitrij Stehl1, Regine von Klitzing1, Yuri Lvov2, Tobias Pogrzeba1, Marcel Schmidt1, Reinhard Schomäker1, Lena Hohl3, Matthias Kraume3, Joachim Koetz4, Tina Skale5, and Anja Drews5 — 1TU-Berlin, Straße des 17 Juni 124, 10623 Berlin — 2Louisiana Tech University, 911 Hergot Ave, Ruston, LA 71272, USA — 3TU-Berlin, Frauenhoferstr. 33-36, 10587 Berlin — 4Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam — 5HTW Berlin, Wilhelminenhofstr. 75 A, 12459 Berlin
Pickering-emulsions (PEs) are particle-stabilized emulsions. In the combination with Halloysites as stabilizing nanoparticles, PEs fulfil the qualifications of green chemistry and open up new industrial possibilities. Halloysites are multiwall, inorganic tubes with negative charges at the outer surface and positive charges at the inner surface. In this study, the hydroformylation of long chained olefins (1-Dodecene) in PEs was used as a model system, to prove the catalytic power of Halloysites. The water phase contains the homogeneous catalyst and the oil phase (1-Dodecene) is simultaneous the reactant. After the hydroformylation the expensive rhodium-catalyst can be easily separated from the product (Tridecanal) and can be reused. The effect of different parameters such as concentration of the Halloysites, energy input by the PE-fabrication, water/oil ratio and the reaction parameters were analyzed. Furthermore, we study the essential interfacial interactions between water, oil and Halloysites. In order to control the emulsion properties the Halloysites were partially hydrophobized.