Thermal stability of superhydrophobic, nanostructured surfaces
- Thermal stability of superhydrophobic, nanostructured surfaces
- 차성철; 허은규; 고태준; 김성진; 노현철; 이광렬; 오규환; 문명운
- DLC; high temperature stability; wetting angle; hydrophobic
- Issue Date
- Journal of colloid and interface science
- VOL 391, 152-157
- The thermal stability of superhydrophobic, nanostructured surfaces after thermal annealing was explored. Flat surfaces coated with hydrophobic diamond-like carbon (DLC) via plasma polymerization of hexamethyldisiloxane (HMDSO) showed a gradual decrease in the water contact angle from 90o to 60o while nanostructured surfaces maintained superhydrophobicity with more than 150° for annealing temperatures between 25 and 300 °C. It was also found that surfaces with nanostructures having an aspect ratio of more than 5.2 may maintain superhydrophobicity for annealing temperatures as high as 350 °C; above this temperature, however, the hydrophobicity on surfaces with lower aspect ratio nanostructures gradually degraded. It was observed that regardless of the aspect ratios of the nanostructure, all superhydrophobic surfaces became superhydrophilic after annealing at temperatures higher than 500 °C.
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