Regensburg 2019 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 20: Wetting, Fluidics and Liquids at Interfaces and Surfaces (joint session CPP/DY)

CPP 20.12: Talk

Tuesday, April 2, 2019, 12:45–13:00, H13

Impact of Nanoparticles' Surface Properties on their Physico-Chemical Behavior in Pickering Emulsions — •Sebastian Stock, Dmitrij Stehl, Sandra Forg, and Regine von Klitzing — TU Darmstadt, Darmstadt, Germany

Pickering Emulsions (PEs) were first studied by S. U. Pickering in the beginning of the last century and describe emulsions stabilized by particles that adsorb at the oil water interface and prevent coalescence of the droplets. In the present study Halloysite Nanotubes, fumed colloidal silica and Latex nanospheres are used to stabilize PEs. They display significant differences regarding their surface properties, size and shape. The surface of these particles is modified in order to investigate the influence of surface charge or hydrophobicity on the whole systems behavior including emulsion stability and reaction performance in homogeneous catalysis at the oil-water-interface. Additionally, the effect of the surface-active Rh-catalyst is investigated. The interaction between catalyst and particle surface plays a significant role for mass transfer and conversion.