In situ, noninvasive characterization of superhydrophobic coatings
Abstract
Light scattering was used to measure the time-dependent loss of air entrapped within a submerged microporous hydrophobic surface subjected to different environmental conditions. The loss of trapped air resulted in a measurable decrease in surface reflectivity and the kinetics of the process was determined in real time and compared to surface properties, such as porosity and morphology. The light-scattering results were compared with measurements of skin-friction drag, static contact angle, and contact-angle hysteresis. The in situ, noninvasive optical technique was shown to correlate well with the more conventional methods for quantifying surface hydrophobicity, such as flow slip and contact angle.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2011
- Source ID
- 10.1063/1.3579498
Entities
People
- Fredrick O. Ochanda
- Gary C. Tepper
- Hooman Vahedi Tafreshi
- Mohamed A. Samaha
- Mohamed Gad-el-hak
Organizations
- Defense Advanced Research Projects Agency
- Virginia Commonwealth University