Designing Superoleophobic Surfaces (Postprint)
Abstract
Understanding the complementary roles of surface energy and roughness on natural nonwetting surfaces has led to the development of a number of biomimetic superhydrophobic surfaces, which exhibit apparent contact angles with water greater than 150 degrees and low contact angle hysteresis. However, superoleophobic surfaces - those that display contact angles greater than 150 degrees with organic liquids having appreciably lower surface tensions than that of water - are extremely rare. Calculations suggest that creating such a surface would require a surface energy lower than that of any known material. We show how a third factor, re-entrant surface curvature, in conjunction with chemical composition and roughened texture, can be used to design surfaces that display extreme resistance to wetting from a number of liquids with low surface tension, including alkanes such as decane and octane.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 07, 2007
- Accession Number
- ADA489553
Entities
People
- Anish Tuteja
- Gareth McKinley
- Gregory C. Rutledge
- Joseph M Mabry
- Minglin Ma
- Robert E. Cohen
- Sarah A. Mazzella
- Wonjae Choi
Organizations
- Air Force Research Laboratory