3D-Printed Surface Architecture Enhancing Superhydrophobicity and Viscous Droplet Repellency
| Autor: | Oskar B. Martin Kieliger, Dimos Poulikakos, Gustav Graeber, Thomas M. Schutzius |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
3d printed Materials science Fluid Dynamics (physics.flu-dyn) technology industry and agriculture FOS: Physical sciences 02 engineering and technology Physics - Fluid Dynamics Viscous liquid Condensed Matter - Soft Condensed Matter 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Viscosity droplet impact superhydrophobicity icephobicity 3D printing viscous liquid pancake bouncing Fluid dynamics Soft Condensed Matter (cond-mat.soft) General Materials Science Icephobicity Texture (crystalline) Composite material 0210 nano-technology Supercooling |
| Zdroj: | ACS Applied Materials & Interfaces, 10 (49) ACS Applied Materials & Interfaces |
| Popis: | Macro-textured superhydrophobic surfaces can reduce droplet-substrate contact times of impacting water droplets, however, surface designs with similar performance for significantly more viscous liquids are missing, despite their importance in nature and technology such as for chemical shielding, food staining repellency, and supercooled (viscous) water droplet removal in anti-icing applications. Here, we introduce a deterministic, controllable and up-scalable method to fabricate superhydrophobic surfaces with a 3D-printed architecture, combining arrays of alternating surface protrusions and indentations. We show a more than threefold contact time reduction of impacting viscous droplets up to a fluid viscosity of 3.7mPa s, which equals 3.7 times the viscosity of water at room temperature, covering the viscosity of many chemicals and supercooled water. Based on the combined consideration of the fluid flow within and the simultaneous droplet dynamics above the texture, we recommend future pathways to rationally architecture such surfaces, all realizable with the methodology presented here. ACS Appl. Mater. Interfaces, Article ASAP, Publication Date (Web): November 19, 2018 |
| Databáze: | OpenAIRE |
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