Mechanism of Frost Formation on Lubricant-Impregnated Surfaces

Rykaczewski, Konrad; Anand, Sam; Subramanyam, Srinivas Bengaluru; Varanasi, Kripa K.

doi:10.1021/la400801s

Cited by 330 publications

(295 citation statements)

References 57 publications

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“…The observed switchable freezing temperature is in contradiction to the long standing point of view, that electric fields do not necessarily support the freezing process or will increase the freezing temperature. In contrast to the method presented here the water system in previously-described investigations [20] was cooled down to a supercooled state and an electric field was applied to this supercooled water system or alternatively water was cooled down in the presence of an external field [21]. In this work, however, the establishment of an electric field is part of the cooling process and takes place at the same time as the crystallization process.…”

Section: Discussionmentioning

confidence: 99%

“…Another appropriate approach represents switchable hydrophobic-hydrophilic and swellable surfaces working as a sponge-like liquid reservoir [17][18][19]. Combined inflexible and flexible layers based on oil trapped in silicon structures have at present a limited number of operational cycles due to oil depletion or water penetration into the substrate [20] and have limited application due to the risk of frost damage in a similar manner to the porous structures mentioned above.…”

Section: Introductionmentioning

confidence: 99%

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Reversible Switching of Icing Properties on Pyroelectric Polyvenylidene Fluoride Thin Film Coatings

et al. 2015

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Abstract:In this work a new approach for ice repellent coatings is presented. It was shown that the coatings cause a decrease or increase in the freezing temperature of water depending on the alignment of an external electric field. For this coating the commonly used pyroelectric polymer polyvenylidene fluoride was deposited as a thin film on glass. The samples were dip-coated and subsequently thermally-treated at 140 °C for 1 h. All samples were found to cause a reduction of the icing temperature of water on their surface in comparison to uncoated glass. On several samples an external electric field was applied during this thermal treatment. The field application was found to cause a remarkable reduction of the icing temperature where a maximum lowering of the freezing temperature of 3 K compared to uncoated glass could be achieved. The actual achieved reduction of the icing temperature was observed to depend on the polarity of the field applied during the thermal treatment. Furthermore, a repetition of the thermal treatment under oppositely directed electric fields led to a switchable freezing behavior of water according to the direction of the applied field. With an increasing number of cycles of switching of the icing property a slight training effect towards lower freezing temperatures was observed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversible Switching of Icing Properties on Pyroelectric Polyvenylidene Fluoride Thin Film Coatings

et al. 2015

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“…under a very wide range of atmospheric conditions, may be very limited [1,2,13,16,22,33]. In a similar way, a recent study reported by Rykaczewski and coauthors [34] also raised doubts about the universal use of another class of rough anti-icing materials, i.e. so-called lubricant-impregnated surfaces (having rough surfaces infused with water-immiscible liquid).…”

mentioning

confidence: 84%

The icephobic performance of alkyl-grafted aluminum surfaces

et al. 2015

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Abstract. The work analyzes the anti-icing performance of flat aluminum surfaces coated with widely used alkyl-group based layers of octadecyltrimethoxysilane, fluorinated alkylsilane and stearic acid as they are subjected to repeated icing/deicing cycles. The wetting properties of the samples upon long-term immersion in water are also evaluated. The results demonstrate that smooth aluminum surfaces grafted with alkyl groups are prone to gradual degradation of their hydrophobic and icephobic properties, which is caused by interaction and reactions with both ice and liquid water. This implies that alkyl-group based monolayers on aluminum surfaces are not likely to be durable icephobic coatings unless their durability in contact with ice and/or water is significantly improved.

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“…Lubricant-infused nano-/micro-structured surfaces have been recently introduced as an alternative approach to omniphobic materials [1][2][22][23][25][26][27][28][29][30]. The key feature of this design is the anchoring of a lubricating liquid into a chemically similar, texturized solid substrate, thus creating a stable, smooth, defect-free and liquid-repellent interface.…”

Section: Introductionmentioning

confidence: 99%

Fabrics coated with lubricated nanostructures display robust omniphobicity

Shillingford¹,

MacCallum²,

Wong

et al. 2013

Nanotechnology

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The development of a stain-resistant and pressure-stable textile is desirable for consumer and industrial applications alike, yet it remains a challenge that current technologies have been unable to fully address. Traditional superhydrophobic surfaces, inspired by the lotus plant, are characterized by two main components: hydrophobic chemical functionalization and surface roughness. While this approach produces water-resistant surfaces, these materials have critical weaknesses that hinder their practical utility, in particular as robust stain-free fabrics. For example, traditional superhydrophobic surfaces fail (i.e., become stained) when exposed to lowsurface-tension liquids, under pressure when impacted by a high-velocity stream of water (e.g., rain), and when exposed to physical forces such as abrasion and twisting. We have recently introduced slippery lubricant-infused porous surfaces (SLIPS), a self-healing, pressure-tolerant and omniphobic surface, to address these issues. Herein we present the rational design and optimization of nanostructured lubricant-infused fabrics and demonstrate markedly improved performance over traditional superhydrophobic textile treatments: SLIPS-functionalized cotton and polyester fabrics exhibit decreased contact angle hysteresis and sliding angles, omnirepellent properties against various fluids including polar and nonpolar liquids, pressure tolerance and mechanical robustness, all of which are not readily achievable with the state-ofthe-art superhydrophobic coatings.2

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Mechanism of Frost Formation on Lubricant-Impregnated Surfaces

Cited by 330 publications

References 57 publications

Reversible Switching of Icing Properties on Pyroelectric Polyvenylidene Fluoride Thin Film Coatings

Reversible Switching of Icing Properties on Pyroelectric Polyvenylidene Fluoride Thin Film Coatings

The icephobic performance of alkyl-grafted aluminum surfaces

Fabrics coated with lubricated nanostructures display robust omniphobicity

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