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Title:Droplet repellency of microfabricated surfaces in saturated environments
Author(s):Torrealba, Eduardo
Advisor(s):King, William P.
Department / Program:Mechanical Sci & Engineering
Discipline:Mechanical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:M.S.
Genre:Thesis
Subject(s):hydrophobic
omniphobic
Abstract: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.
Issue Date:2013-08-22
URI:http://hdl.handle.net/2142/45573
Rights Information:Copyright 2013 Eduardo Torrealba
Date Available in IDEALS:2013-08-22
2015-08-22
Date Deposited:2013-08


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