Droplet repellency of microfabricated surfaces in saturated environments

hydrophobic;omniphobic

Torrealba, Eduardo ; King ; William P.

关键词: hydrophobic;    omniphobic;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/45573/Eduardo_Torrealba.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This thesis reports changes in apparent contact angles for droplets of various liquids on microstructured surfaces in saturated environments.Micro scale pillar surfaces maintain the non-wetting Cassie-Baxter regime for drops of water over a range of saturation temperatures while micro scale waffles transition into a partially wetted state under the same conditions. Micro scale mushroom and waffle surfaces are able to maintain oleophobic behavior for droplets in a saturated environment with a concentration of up to 50% R-134a. The surfaces described in this thesis could be used to significantly improve devices that rely upon a liquid-vapor interface, including two-phase heat exchangers, water purification systems, and microfluidic devices.