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DY: Fachverband Dynamik und Statistische Physik

DY 46: Poster: Wetting, Nano- and Microfluidics

DY 46.4: Poster

Mittwoch, 9. März 2016, 18:15–21:00, Poster B2

Super Liquid Repellency — •Frank Schellenberger, Jing Xie, Noemí Encinas, Maxime Paven, Doris Vollmer, and Hans-Jürgen Butt — Max Planck Institute for Polymer Research, Mainz, Germany

The Pandora box of surfaces able to repell liquids is still a hot research topic. These surfaces are able to remove dust (self-cleaning) and can even hinder the growth of microorganism colonies.

Over the past years we have created superhydrophobic coatings (water repellent) where water droplets sit on microscopic pockets of air, which are trapped beneath the liquid drops. We even designed superamphiphobic coatings (i.e. water and oil repellent). One of these types are the so called slippery surfaces, where after infusing a rough/porous structure with a lubricant a deposited drop will slip by tilting the surface by a few degrees. This pressure-stable omniphobicity opens exciting applications for anti-biofouling, anti-icing or anti-frost performances. However, the mechanism how a drop moves on slippery surfaces is still unclear.

In this case, we used Laser Scanning Confocal Microscopy (LSCM) to observe the contact angles and evaluate the dynamics of droplet motion on the microscale.