KES4-1598
Electric charging of polymer films by sliding water drops
Topic
S4. Colloids, Interfaces, and Molecular Assemblies for Functional Soft Materials
When and Where
Sep 30, 2026
10:20 - 10:45
Room 106
Session Chairs
Sangchul ROH
Presenter(s)
Hans Jurgen BUTT (Max Planck Institute for Polymer Research)
Co-Author(s)
Abstract
In the last years it has been established that, like in triboelectricity, moving water drops can separate electric charges. This phenomenon is called slide or contact electrification. For hydrophobic polymer films drops spontaneously acquire a positive charge while they deposit negative charges on the polymer. The electric potentials can easily reach 1 kV and for polymer films on metals the electric field strength can exceed dieletric breakdown. In the presentation the current state of knowledge about slide electrification and its consequences for drop motion, deposition of solutes and corrosion will be described.
