Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 97: Wetting and Liquids at Interfaces and Surfaces I (joint session CPP/DY/O)

O 97.1: Vortrag

Donnerstag, 19. März 2020, 09:30–09:45, ZEU 255

Designing Pickering Emulsions for Catalysis: Influence of Nanoscale Particle Properties on Microscale Droplets — •Sebastian Stock1, Annika Schlander1, Kai Spanheimer1, Maresa Kempin2, Dmitrij Stehl1, Anja Drews2, Markus Gallei3, and Regine von Klitzing11TU Darmstadt, Darmstadt, Germany — 2HTW Berlin, Berlin, Germany — 3Universität des Saarlandes, Saarbrücken, Germany

Pickering Emulsions (PEs) describe emulsions stabilized by surface-active particles. The aim of the present work is to design PEs as a reaction environment for catalytic reactions. As a model reaction the hydroformylation of 1-dodecene is 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 dominated 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 prepared. 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.

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