Method for Characterizing Icephobicity of Hydrophobic Coatings

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Presentation transcript:

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

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

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

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

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

Example Video of Droplet Freezing (Anodized Aluminum)

Scope Aircrafts Power lines Ships

Acknowledgements The National Science Foundation and The Department of Defense, EEC-NSF Grant # 0755115 Professor Takoudis and Professor Jursich, REU Program Directors Professor Megaridis Tom Schutzius and Arindam Das

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