Frost formation and ice adhesion on superhydrophobic surfaces

Varanasi, Kripa K.; Deng, Tao; Smith, Jonathan; Hsu, Meichun; Bhate, Nitin

doi:10.1063/1.3524513

Cited by 677 publications

(535 citation statements)

References 22 publications

Supporting

Mentioning

522

Contrasting

Unclassified

Order By: Relevance

“…31 The image reproduced in Figure 3b illustrates that frost will form indiscriminately on superhydrophobic surfaces that are characterized by spatially uniform intrinsic interfacial energies, compromising their liquid repellency. 31 Ice on frosted superhydrophobic surfaces can adhere more strongly than it does on chemically equivalent smooth surfaces 31 because this "Wenzel ice" has a larger interfacial area of interaction with the substrate. One possible strategy for combating this frost-driven transition to the Wenzel state is to control the condensate nucleation spatially.…”

Section: The Research Reported By Mishchenko Et Al In This Issue Furmentioning

confidence: 99%

“…One possible strategy for combating this frost-driven transition to the Wenzel state is to control the condensate nucleation spatially. 27 If the nucleation is constrained to the top portions of the surface texture, it might be possible to facilitate the formation of weakly adhered composite 31 or "Cassie ice" and prevent the formation of the strongly adhered Wenzel ice. A final challenge that must be overcome before textured superhydrophobic surfaces gain widespread use in anti-icing applications is the development of commercially viable fabrication processes.…”

Section: The Research Reported By Mishchenko Et Al In This Issue Furmentioning

confidence: 99%

See 1 more Smart Citation

Exploiting Topographical Texture To Impart Icephobicity

Meuler

McKinley²,

Cohen³

2010

ACS Nano

376

245

View full text Add to dashboard Cite

Appropriately structured topographical features that are found in nature (e.g., the lotus leaf) or that are produced synthetically (e.g., via lithography) can impart superhydrophobic properties to surfaces. Water beads up and readily rolls off of such surfaces, making them selfcleaning. Within the past few years, scientists and engineers have begun exploring the utility of these surfaces in mitigating the icing problem prevalent in the operation of critical infrastructure such as airplanes, ships, power lines, and telecommunications equipment. An article in this issue advances our fundamental knowledge in this area by examining the dynamic impact of water droplets on both smooth and topographically structured supercooled substrates. 1 The results illustrate that, under at least some environmental conditions, superhydrophobic surfaces can minimize or even eliminate ice formation by repelling impinging water drops before they can freeze. Subsequent research will build on these results, possibly leading to the fabrication of commercially viable and durable icephobic surfaces that mitigate the icing problem under all environmental conditions. "Frost is the greatest artist in our clime -He paints in nature and describes in rime" ThomasHood

show abstract

Section: The Research Reported By Mishchenko Et Al In This Issue Furmentioning

confidence: 99%

Section: The Research Reported By Mishchenko Et Al In This Issue Furmentioning

confidence: 99%

Exploiting Topographical Texture To Impart Icephobicity

Meuler

McKinley²,

Cohen³

2010

ACS Nano

376

245

View full text Add to dashboard Cite

show abstract

“…the works by Antonini et al [ Wang et al [76] studied the effects of a nano-fluorocarbon coating on icing, which is depicted in fig.23. Sequential high-speed video images of droplet impact on dry and frosted superhydrophobic surfaces are shown in fig.24 (Varanasi et al [74]), demonstrating that frost alters the wetting properties of the surface. Anti-icing coating design cases with various roughness scales are illustrated in fig.25 (Xiao and Chaudhuri [78]).…”

Section: Investigating Icephobicitymentioning

confidence: 99%

The challenge of removing snow downfall on photovoltaic solar cell roofs in order to maximize solar energy efficiency—Research opportunities for the future

Jelle

2013

Energy and Buildings

View full text Add to dashboard Cite

The challenge of removing snow downfall on photovoltaic solar cell roofs, also including solar thermal panels and walls, in order to maximize the solar energy efficiency, is investigated. A special emphasis is given on possible research opportunities for the future. As the application of building integrated photovoltaic (BIPV) products is increasing, it is becoming more important to solve this challenge in order to maximize the solar energy harvesting from buildings. In addition, a solution within this field, may also be utilized in other areas, e.g. for window roofs and traffic signs which are often concealed by snow and ice. Various ideas and possible steps towards a solution of the challenge are discussed, which may then in turn set in motion creative thinking and problem solving paths with new follow-up investigations. Several aspects with snow covering solar panels are treated and discussed, including possible paths towards a working solution. Furthermore, this work presents the compilation and discussion of an experimental method for measuring friction between snow/ice and various building roof surfaces. Some results from these experimental investigations are discussed, including a slip angle and a friction coefficient classification system for roofing types and material surfaces with respect to snow and ice.

show abstract

“…For example 12 , it was established recently that hydrophilic surfaces with nanometer (nm)-scale roughness (smaller than the size of the first stable ice nuclei) and higher wettability display, up to an order of magnitude, longer freezing delays compared with typical superhydrophobic surfaces with larger hierarchical roughness and very low wettability. In practice, the efficacy of anti-icing materials can also be limited by the presence of frost on the surface 13,14 .…”

mentioning

confidence: 99%

Mechanism of supercooled droplet freezing on surfaces

Jung

Tiwari

Doan³

et al. 2012

Nat Commun

617

391

View full text Add to dashboard Cite

understanding ice formation from supercooled water on surfaces is a problem of fundamental importance and general utility. superhydrophobic surfaces promise to have remarkable 'icephobicity' and low ice adhesion. Here we show that their icephobicity can be rendered ineffective by simple changes in environmental conditions. Through experiments, nucleation theory and heat transfer physics, we establish that humidity and/or the flow of a surrounding gas can fundamentally switch the ice crystallization mechanism, drastically affecting surface icephobicity. Evaporative cooling of the supercooled liquid can engender ice crystallization by homogeneous nucleation at the droplet-free surface as opposed to the expected heterogeneous nucleation at the substrate. The related interplay between droplet roll-off and rapid crystallization is also studied. overall, we bring a novel perspective to icing and icephobicity, unveiling the strong influence of environmental conditions in addition to the accepted effects of the surface conditions and hydrophobicity.

show abstract

Frost formation and ice adhesion on superhydrophobic surfaces

Cited by 677 publications

References 22 publications

Exploiting Topographical Texture To Impart Icephobicity

Exploiting Topographical Texture To Impart Icephobicity

The challenge of removing snow downfall on photovoltaic solar cell roofs in order to maximize solar energy efficiency—Research opportunities for the future

Mechanism of supercooled droplet freezing on surfaces

Contact Info

Product

Resources

About