Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 17: Poster 2

CPP 17.13: Poster

Tuesday, September 6, 2022, 11:00–13:00, P2

Influence of the surface roughness and surface chemistry to understand slide electrification — •Benjamin Leibauer, Werner Steffen, and Hans-Jürgen Butt — Ackermannweg 10 55128 Mainz

In the last few years a lot of studies have shown that by contact electrification between water droplets and hydrophobic surfaces, it is possible to generate electricity in an environmentally friendly way.[1] The physical processes are still being discussed today and to extend the understanding Stetten et al.[2] have established an experimental setup that allows the drop charge of individual drops. In the work presented here we have studied with this setup the influence of the surface roughness and the chemistry of the substrates on hydrophobic to superhydrophobic substrates. We found that for the drop charge both parameters have an influence on at least the same order of magnitude.

[1] C. Wu, A. C. Wang, W. Ding, H. Guo, Z. L. Wang, Advanced Energy Materials 2019, 9, 1802906. [2] A. Z. Stetten, D. S. Golovko, S. A. Weber, H.-J. Butt, Soft Matter 2019, 15, 8667-8679.