Scalable superhydrophobic coatings based on fluorinated diatomaceous earth: Abrasion resistance versus particle geometry

Georgios Polizos; Kyle Winter; Michael J. Lance; Harry M. Meyer; Beth L. Armstrong; Daniel A. Schaeffer; John T. Simpson; Scott R. Hunter; Panos G. Datskos

doi:10.1016/j.apsusc.2013.12.009

Scalable superhydrophobic coatings based on fluorinated diatomaceous earth: Abrasion resistance versus particle geometry

Georgios Polizos, Kyle Winter, Michael J. Lance, Harry M. Meyer, Beth L. Armstrong, Daniel A. Schaeffer, John T. Simpson, Scott R. Hunter, Panos G. Datskos

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

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 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.

Original language	English
Pages (from-to)	563-569
Number of pages	7
Journal	Applied Surface Science
Volume	292
DOIs	https://doi.org/10.1016/j.apsusc.2013.12.009
State	Published - Feb 15 2014

Funding

Oak Ridge National Laboratory is operated for the U.S. Department of Energy by U.T.-Battelle under Contract No. DE-AC05-00OR22725. This work was supported by the U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability – Power Electronics Program , and the SunShot Program of the Office of Energy Efficiency and Renewable Energy . Particle size analyses were supported by the United States Marine Corps Corrosion Prevention and Control Program . A portion of this research was conducted at the Center for Nanophase Materials Sciences, which is sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy . The authors thank John Henry at ORNL for his contributions to the experimental work.

Keywords

Abrasion resistance
Coatings
Diatomaceous earth
Scalable
Superhydrophobic

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10.1016/j.apsusc.2013.12.009

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title = "Scalable superhydrophobic coatings based on fluorinated diatomaceous earth: Abrasion resistance versus particle geometry",

abstract = "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 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.",

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author = "Georgios Polizos and Kyle Winter and Lance, {Michael J.} and Meyer, {Harry M.} and Armstrong, {Beth L.} and Schaeffer, {Daniel A.} and Simpson, {John T.} and Hunter, {Scott R.} and Datskos, {Panos G.}",

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AU - Polizos, Georgios

AU - Winter, Kyle

AU - Lance, Michael J.

AU - Meyer, Harry M.

AU - Armstrong, Beth L.

AU - Schaeffer, Daniel A.

AU - Simpson, John T.

AU - Hunter, Scott R.

AU - Datskos, Panos G.

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N2 - 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 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.

AB - 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 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.

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KW - Coatings

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Scalable superhydrophobic coatings based on fluorinated diatomaceous earth: Abrasion resistance versus particle geometry

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