Berlin 2018 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Poster Session III
CPP 33.17: Poster
Tuesday, March 13, 2018, 14:00–16:00, Poster C
Halloysite nanotubes surface manipulation by catalyst to control physico-chemical properties of Pickering emulsions — •Sebastian Stock1, Dmitrij Stehl1, Regine von Klitzing1, Yuri Lvov3, Tobias Pogrzeba2, and Reinhard Schomäker2 — 1TU Darmstadt, Hochschulstraße 6-8, 64289 Darmstadt — 2TU-Berlin, Straße des 17 Juni 124, 10623 Berlin — 3Louisiana Tech University, 911 Hergot Ave, Ruston, LA 71272, USA
An emulsion with water and oil has a natural tendency to separate in two phases very fast. The high surface energy is minimized by minimizing the surface between the oil and the water phase. To prevent this process and stabilize the emulsion nanoparticles can be used. Suitable particles for this are the Halloysite nanotubes (HNTs). In opposite to common spherical Nanoparticles HNTs are multiwall tubes based on aluminosilicate. They are around 50 nanometers in diameter and can be up to 1 micrometer long. HNTs have the ability to adsorb at the oil/water interface, change the interface properties this way and stabilize the emulsion. These particle stabilized emulsions are named Pickering emulsions (PEs). Different factors influence the PEs structure. The variation of the PEs HNT and salt (NaCl) concentration and HNT surface modifications by the Rh-catalyst were studied. In order to evaluate the PEs properties, the droplet size and the zeta potential are determined.