DPG Phi
Verhandlungen
Verhandlungen
DPG

Regensburg 2016 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

DY: Fachverband Dynamik und Statistische Physik

DY 56: Wetting, Nano- and Microfluidics II (joint session CPP/DY)

DY 56.4: Vortrag

Donnerstag, 10. März 2016, 15:45–16:00, H42

Dynamics of Drop Condensation on Lubricant-Impregnated Surfaces — •Tadashi Kajiya1, Frank Schellenberger1, Periklis Papadopoulos2, Doris Vollmer1, and Hans-Jürgen Butt11Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany — 2University of Ioannina, Dept. of Physics, 45110 Ioannina, Greece

We explored the dynamics of water drops condensing on a lubricant-impregnated surface, i.e., micropillar arrays infused with a ionic liquid. Growing drops were imaged in 3D using a laser scanning confocal microscope equipped with a temperature and humidity control. On a lubricant-impregnated hydrophobic micropillar array, different stages of condensation can be discriminated: - Nucleation on a lubricant surface. - Regular alignement between micropillars and formation of a three-phase contact line on a bottom of the substrate. - Deformation and bridging by coalescence, leading to a detachment of the drops from the bottom substrate to pillars*top faces. However, on a lubricant-impregnated hydrophilic micropillar array, the condensed water covers the micropillars by dewetting the lubricant. As a result, the surface loses its slippery property. Our results provide fundamental concepts how these solid/liquid hybrid surfaces can be applied for facile removal of condensed water.

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2016 > Regensburg