Super-Hydrophobic/Icephobic Coatings Based on Silica Nanoparticles Modified by Self-Assembled Monolayers
| Autor: | Kwing-So Choi, Xianghui Hou, Fang Xu, M.J. Roe, Zaid A. Janjua, Junpeng Liu, Barbara Turnbull |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Scanning electron microscope General Chemical Engineering super-hydrophobic icephobic silica nanoparticles fluorosilane self-assembled monolayers durability Nanotechnology 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Article lcsh:Chemistry Contact angle Coating General Materials Science Composite material Porosity Hydrophobic silica Spin coating Nanocomposite technology industry and agriculture 021001 nanoscience & nanotechnology 0104 chemical sciences lcsh:QD1-999 engineering Icephobicity 0210 nano-technology |
| Zdroj: | Nanomaterials; Volume 6; Issue 12; Pages: 232 Nanomaterials, Vol 6, Iss 12, p 232 (2016) Nanomaterials |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano6120232 |
| Popis: | A super-hydrophobic surface has been obtained from nanocomposite materials based on silica nanoparticles and self-assembled monolayers of 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POTS) using spin coating and chemical vapor deposition methods. Scanning electron microscope images reveal the porous structure of the silica nanoparticles, which can trap small-scale air pockets. An average water contact angle of 163° and bouncing off of incoming water droplets suggest that a super-hydrophobic surface has been obtained based on the silica nanoparticles and POTS coating. The monitored water droplet icing test results show that icing is significantly delayed by silica-based nano-coatings compared with bare substrates and commercial icephobic products. Ice adhesion test results show that the ice adhesion strength is reduced remarkably by silica-based nano-coatings. The bouncing phenomenon of water droplets, the icing delay performance and the lower ice adhesion strength suggest that the super-hydrophobic coatings based on a combination of silica and POTS also show icephobicity. An erosion test rig based on pressurized pneumatic water impinging impact was used to evaluate the durability of the super-hydrophobic/icephobic coatings. The results show that durable coatings have been obtained, although improvement will be needed in future work aiming for applications in aerospace. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|