BPCPPDYSOE21 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Complex Fluids and Soft Matter 1 (joint session DY/CPP)
CPP 18.3: Vortrag
Mittwoch, 24. März 2021, 09:40–10:00, DYa
Designing Pickering Emulsions for Catalysis: Influence of Nanoscale Particle Properties on Microscale Droplets — •Sebastian Stock1, Annika Schlander1, Kai Spanheimer1, Maresa Kempin2, Ariane Weber3, Reinhard Schomäcker3, Anja Drews2, Marcus Gallei4, and Regine von Klitzing1 — 1TU Darmstadt, Darmstadt, Germany — 2HTW Berlin, Berlin, Germany — 3TU Berlin, Berlin, Germany — 4Saarland University, Saarbrücken, Germany
Pickering Emulsions (PEs) describe emulsions stabilized by (nano) particles. The aim of the work was to design PEs as a reaction environment for catalytic reactions. As a model reaction the hydroformylation of 1-dodecene was investigated. Due to the PEs high stability separation methods with outstanding energy efficiency are applicable e. g. the separation of the oil phase by nanofiltration. Many microscopic and macroscopic PE properties are determined in a large degree by the nanoscale properties of the particles. In order to distinguish the impact of particle surface charge both positively and negatively charged silica spheres were produced. This was achieved by adequate surface modification. The resulting nanoscale particle properties concerning size, shape, charge, and hydrophobicity were investigated via Transmission Electron Microscopy (TEM), ζ-potential and sessile drop measurements, the effect on the microscopic emulsion properties were studied with microscopy and the PEs reaction behavior including yield and stability was evaluated.