Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Focus Session: Wetting on Adaptive Substrates III (joint session CPP/DY/O)
CPP 50.7: Vortrag
Freitag, 22. März 2024, 11:45–12:00, H 0110
Dynamics of Moving Droplets on Lubricated Polymer Brushes — •Rodrique Badr1, Lukas Hauer2,3, Doris Vollmer3, and Friederike Schmid1 — 1Johannes Gutenberg University, Mainz — 2Humboldt-Universität zu Berlin, Berlin — 3Max Planck Institute for Polymer Research, Mainz
The interaction of liquid droplets with lubricated substrates is rich with interesting physics combining thermodynamics, polymer science, and fluid dynamics, and has the potential for various industrial applications. In this work we focus on the dynamics of droplets moving on lubricated polymer brushes. In previous work, we showed the existence of a cloaking transition where the lubricant covers the surface of the droplet at equilibrium. Here, we investigate the influence of this cloak on the dynamics, in addition to its properties during the dynamical steady state. In addition, we investigate the characteristic of the wetting ridge, as well as the flow of the droplet, and quantify the friction forces felt by the droplet during its motion.
Keywords: wetting; polymer brush; lubricated substrates; wetting dynamics