期刊
APPLIED SURFACE SCIENCE
卷 292, 期 -, 页码 563-569出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.12.009
关键词
Diatomaceous earth; Superhydrophobic; Coatings; Scalable; Abrasion resistance
类别
资金
- U.S. Department of Energy [DE-AC05-00OR22725]
- U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability - Power Electronics Program
- SunShot Program of the Office of Energy Efficiency and Renewable Energy
- Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy
Bio-inspired superhydrophobic surfaces were fabricated based on fossilized silica fresh water diatomaceous earth (DE) particles. These nanostructured silicified diatom frustules of cylindrical and circular structures were fluorinated to impart them with superhydrophobic properties. Substrates coated with superhydrophobic DE structures of varying size and shape were found to have water contact angles of approximately 170 degrees and sliding angles of approximately 3. The substrates were subjected to significant abrasion forces using a standard surface abrader. The ability to retain their superhydrophobic properties was observed to depend on the geometry and average size of the DE particles. The wettability of the abraded coatings was determined by their surface topology, and a transition from a non-wetted state to a partially wetted state was observed to occur and was dependent on the surface roughness. The proposed coatings are scalable, cost-effective, and can be applied on a variety of surfaces on critical infrastructures requiring protection from water saturation, ice formation and water based corrosion. (C) 2013 Elsevier B.V. All rights reserved.
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