1. Method for Characterizing Icephobicity of Hydrophobic Coatings
Jillian McManus
Micro/Nanoscale Fluid Transport Lab- Dr. C. Megaridis
2010 UIC REU

2. Coating Properties Hydrophobicity Governed By:
Surface Roughness (Hierarchical Microscale-to- Nanoscale Surface Texture)
Surface Energy
Icephobicity Governed By:
Unknown

3. Direction of Research
Investigate relationships between hydrophobicity and icephobicity
Hydrophobicity
Roll-off Angle
Contact Angle
Icephobicity
Freezing Delay Time (of a single ml droplet) resting on substrate
Prefabricated Substrates
1st Round of Trials- Varying Surface Energies
2nd Round of Trials- Varying Surface Roughness

4. Substrates Variable Surface Energies Varying Surface Roughness Teflon
Anodized Aluminum
Silica Rubber
Copper
Stainless Steel
Varying Surface Roughness
Aluminum (A..b..c roughness)
Teflon (a…b ..c roughness)
Ultra Nanocrystalline Diamond

5. Experimental Setup Oxygen Analyzer
Tubing to carry gas to oxygen analyzer
CCD Camera
Thermocouple (corresponds to temp. in needle)
Hot Plate and Container of De-ionized Water
Nitrogen Line
Calibrated Drop Dispenser (Yellow Tubing Connects to needle)
LED Lighting
Substrate Stage
Needle and inserted thermocouple wire
Secondary Thermometer
Foil for deflecting Nitrogen flow
Dessicating packs
Insulated Tubing for Droplet Delivery

6. Example Video of Droplet Freezing (Anodized Aluminum)

7. Scope
Aircrafts
Power lines
Ships

8. Acknowledgements
The National Science Foundation and The Department of Defense, EEC-NSF Grant #
Professor Takoudis and Professor Jursich, REU Program Directors
Professor Megaridis
Tom Schutzius and Arindam Das

9. Sources