Dynamic characteristics of droplet impacting on prepared hydrophobic/superhydrophobic silicon surfaces
| Autor: | Ma Xiaowen, Lei Zhang, Huichen Zhang, Li Xiaolei |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Silicon business.industry Pillar chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Surface energy 010305 fluids & plasmas Surfaces Coatings and Films Physics::Fluid Dynamics Contact angle Optics chemistry Superhydrophobe 0103 physical sciences Materials Chemistry Composite material Reactive-ion etching 0210 nano-technology business |
| Zdroj: | Surface and Coatings Technology. 307:243-253 |
| ISSN: | 0257-8972 |
| DOI: | 10.1016/j.surfcoat.2016.08.089 |
| Popis: | Micro pillar arrays were fabricated on silicon surfaces based on the reactive ion etching technology. Low surface energy coatings were deposited on textured surfaces in order to prepare hydrophobic/superhydrophobic surfaces. After measuring the static contact angles and roll angles, the dynamic characteristics of droplets impacting on these hydrophobic/superhydrophobic surfaces were investigated in detail. Both the static contact angle and the roll angle increased with the increase of micro pillars' height. With the increase of micro pillars' spacing, the roll angle decreased, but the change of static contact angle was irregular. On superhydrophobic surfaces, the spreading coefficient of droplet was affected by both the static contact angle and the roll angle, and the rebounding coefficient of droplet was highly relevant with the roll angle. In addition, the bigger the incline angle of surface, the smaller the spreading coefficient and the smaller the rebounding coefficient of droplet. |
| Databáze: | OpenAIRE |
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