Do Self-cleaning Surfaces Repel Ice?

Dodiuk, H.; Kenig, S.; Dotan, A.

doi:10.1163/016942411x575933

Cited by 39 publications

(23 citation statements)

References 1 publication

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“…Generally, wetting characteristics is studied to better evaluate the icing properties of a surface. Several studies suggest that superhydrophobic surfaces can exhibit icephobic behavior [2,[20][21][22][23][24][25][26]. While hydrophobic coatings are shown to be able to reduce the ice adhesion strength to some extent, it has been unclear how this reduction correlates with various measurements of a superhydrophobic surface.…”

Section: Introductionmentioning

confidence: 99%

On the Icephobic Behavior of Organosilicon-Based Surface Structures Developed Through Atmospheric Pressure Plasma Deposition in Nitrogen Plasma

2019

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In many regions around the world, atmospheric icing during freezing rains and ice storms can cause severe damage to exposed infrastructure. Subsequently, protective coatings capable of ice accumulation prevention or ice adhesion reduction, often referred to as icephobic coatings, have gained a significant amount of interest. In this study, we examine an atmospheric-pressure plasma jet technique for the development of organosilicon-based icephobic coatings on aluminum substrates. Initially, Al-6061 samples are exposed to multiple passes of air plasma treatment at very short jet-to-substrate distances to create a microporous alumina-based surface structure. These surfaces are then used for plasma deposition of superhydrophobic coatings in the same jet with hexamethyldisiloxane (HMDSO) as the precursor and nitrogen as the plasma gas. Several samples are created with varying plasma precursor flow rates and number of deposition passes. All samples are exposed to three cycles of icing/de-icing to estimate coatings’ stability in aggressive natural conditions. The effects of multiple icing/de-icing cycles on surface chemistry, surface morphology, and wetting behavior is studied. It is shown that the most remarkable mechanism through which icing affects surface properties is coating removal during aggressive de-icing procedure. Finally, the icephobic properties of the most efficient coating (referred to as PT5x3) is further studied through 10 cycles of icing/de-icing, and it is shown that this coating can reduce ice adhesion strength by a factor of at least two for up to nine cycles of icing/de-icing.

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Section: Introductionmentioning

confidence: 99%

On the Icephobic Behavior of Organosilicon-Based Surface Structures Developed Through Atmospheric Pressure Plasma Deposition in Nitrogen Plasma

2019

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“…10 To overcome these problems, topographical surface treatment techniques have been developed, resulting in surfaces which passively delay icing and/or reduce ice adhesion strength without external power input. We recently discussed various definitions employed for icephobicity such as the ability of a surface to repel incoming low-temperature water droplets, [11][12][13][14][15][16] delay ice nucleation time, 13,17,18 and lower ice adhesion strength to surfaces 13,[19][20][21][22] in an extensive review article. 23 Over the last two decades, there has been significant progress in research and development of surfaces that are icephobic (to varying extents) according to these definitions.…”

Section: Introductionmentioning

confidence: 99%

Scalable and durable polymeric icephobic and hydrate-phobic coatings

et al. 2018

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Ice formation and accumulation on surfaces can result in severe problems for solar photovoltaic installations, offshore oil platforms, wind turbines and aircrafts. In addition, blockage of pipelines by formation and accumulation of clathrate hydrates of natural gases has safety and economical concerns in oil and gas operations, particularly at high pressures and low temperatures such as those found in subsea or arctic environments. Practical adoption of icephobic/hydrate-phobic surfaces requires mechanical robustness and stability under harsh environments. Here, we develop durable and mechanically robust bilayer poly-divinylbenzene (pDVB)/poly-perfluorodecylacrylate (pPFDA) coatings using initiated chemical vapor deposition (iCVD) to reduce the adhesion strength of ice/hydrates to underlying substrates (silicon and steel). Utilizing a highly-cross-linked polymer (pDVB) underneath a very thin veneer of fluorine-rich polymer (pPFDA) we have designed inherently rough bilayer polymer films that can be deposited on rough steel substrates resulting in surfaces which exhibit a receding water contact angle (WCA) higher than 150° and WCA hysteresis as low as 4°. Optical profilometer measurements were performed on the films and root mean square (RMS) roughness values of Rq = 178.0 ± 17.5 nm and Rq = 312.7 ± 23.5 nm were obtained on silicon and steel substrates, respectively. When steel surfaces are coated with these smooth hard iCVD bilayer polymer films, the strength of ice adhesion is reduced from 1010 ± 95 kPa to 180 ± 85 kPa. The adhesion strength of the cyclopentane (CyC5) hydrate is also reduced from 220 ± 45 kPa on rough steel substrates to 34 ± 12 kPa on the polymer-coated steel substrates. The durability of these bilayer polymer coated icephobic and hydrate-phobic substrates is confirmed by sand erosion tests and examination of multiple ice/hydrate adhesion/de-adhesion cycles.

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“…Superhydrophobic (SH) coatings based on sol–gel technology have been the subject of applied and fundamental studies [ 1 , 2 , 3 , 4 ], exhibiting a water contact angle (WCA) above 150° and a water sliding angle (WSA) lower than 5° [ 2 , 5 ]. Superhydrophobicity, as observed in nature, is characterized by a hierarchical morphology [ 6 , 7 , 8 , 9 , 10 , 11 , 12 ] comprising macro hills or pillars covered with nanometric roughness, the nature of which are three-dimensional epicuticular waxes [ 8 , 11 , 13 , 14 , 15 ] composed of long chains hydrophobic hydrocarbons. The need for roughness has been stipulated by Cassie and Baxter [ 2 , 7 , 16 , 17 ], supported by the fact that the WCA of the lowest surface energy of a smooth surface is 120° [ 13 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Sol–Gel Superhydrophobic Coatings Based on Alkyl Silane-Modified Nanosilica

et al. 2021

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Hybrid sol–gel superhydrophobic coatings based on alkyl silane-modified nanosilica were synthesized and studied. The hybrid coatings were synthesized using the classic Stöber process for producing hydrophilic silica nanoparticles (NPs) modified by the in-situ addition of long-chain alkyl silanes co-precursors in addition to the common tetraethyl orthosilicate (TEOS). It was demonstrated that the long-chain alkyl substituent silane induced a steric hindrance effect, slowing the alkylsilane self-condensation and allowing for the condensation of the TEOS to produce the silica NPs. Hence, following the formation of the silica NPs the alkylsilane reacted with the silica’s hydroxyls to yield hybrid alkyl-modified silica NPs having superhydrophobic (SH) attributes. The resulting SH coatings were characterized by contact angle goniometry, demonstrating a more than 150° water contact angle, a water sliding angle of less than 5°, and a transmittance of more than 90%. Confocal microscopy was used to analyze the micro random surface morphology of the SH surface and to indicate the parameters related to superhydrophobicity. It was found that a SH coating could be obtained when the alkyl length exceeded ten carbons, exhibiting a raspberry-like hierarchical morphology.

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Do Self-cleaning Surfaces Repel Ice?

Cited by 39 publications

References 1 publication

On the Icephobic Behavior of Organosilicon-Based Surface Structures Developed Through Atmospheric Pressure Plasma Deposition in Nitrogen Plasma

On the Icephobic Behavior of Organosilicon-Based Surface Structures Developed Through Atmospheric Pressure Plasma Deposition in Nitrogen Plasma

Scalable and durable polymeric icephobic and hydrate-phobic coatings

Hybrid Sol–Gel Superhydrophobic Coatings Based on Alkyl Silane-Modified Nanosilica

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