Reframing ice adhesion mechanisms on a solid surface

Applied Surface Science, Journal Year: 2023, Volume and Issue: 641, P. 158462 - 158462

Published: Sept. 11, 2023

Mitigating icing hazards is of interest for many technological applications. One solution to employ low ice adhesion coatings, either passively or in combination with active de-icing systems. Nevertheless, comparing different surfaces can be challenging. Studies generally report the average shear stress, calculated as ratio applied force ice-substrate contact area; however, fracture mechanism at interface rarely reported. There are two mechanisms that occur interface: stress-dominated and toughness-dominated. Average stress only meaningful when performing tests a regime; otherwise, stresses underestimated misleading. This study presents new understanding combining experimental numerical methods, demonstrating how traditional reporting method lead errors up 400%. Using simple model, shows regime horizontal push test favored by smaller diameter greater thickness, also affected load position. The identification regimes required correct reproducibility results, enabling better design characterization icephobic coatings materials.

Language: Английский

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Exploiting intermediate wetting on superhydrophobic surfaces for efficient icing prevention

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 670, P. 550 - 562

Published: May 12, 2024

Superhydrophobic surfaces can effectively prevent the freezing of supercooled droplets in technological systems. Droplets on superhydrophobic commonly not only wet top asperities (Cassie State), but also partially penetrate into microstructure due to surface properties, environment, and droplet impact occurring real-world applications. Implications ice nucleation be expected are little explored. It remains elusive how anti-icing designed exploit intermediate wetting phenomena. We utilized engineered micro-/nanostructures, specifically micropillars, modulate fraction microstructure. The behavior with supercooling resulting implications delay when potential sites formed microcavities were investigated using experimental, theoretical, simulation components. temperature-dependent increased at temperatures, partly activated by condensation microcavities. At −10/−20 °C, a critical led maximum delays, experimental results consistent theoretical predictions. This minimized effective contact area solid-to-liquid along wetted study establishes physical relations between geometrical parameters wettability properties regime, providing guidance for design resistant microstructured surfaces.

Language: Английский

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Transition of Liquid Drops on Microstructured Hygrophobic Surfaces from the Impaled Wenzel State to the “Fakir” Cassie–Baxter State

Langmuir, Journal Year: 2024, Volume and Issue: 40(26), P. 13422 - 13427

Published: June 3, 2024

Low adhesion of liquids on solid surfaces can be achieved with protrusions that minimize the contact area between liquid and solid. The wetting state where an air cushion forms under drop is known as Cassie-Baxter state. Surfaces form macroscopic angles above 150° are called superhydrophobic superhygrophobic, if we refer to water or any liquid, respectively. Cassie desirable for applications, but it usually unstable compared Wenzel state, in direct rough surface. Cassie-to-Wenzel transition triggered by increase pressure vibrations, inverse Wenzel-to-Cassie much more difficult observe. Here, examine what conditions when microscopic angle changes abruptly. For this, applied a lubricant low surface tension around drops were microstructured surfaces. lifted from surface, pillar height spacing large small, Numerical calculations drop-lubricant interface showed geometry requirements stricter than ones stability A stable given Laplace may not always allow take place. Therefore, necessary insufficient condition transition.

Language: Английский

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Photothermal and superhydrophobic composite coatings with sandwich and interlocking structure for effective anti-icing and de-icing

Surfaces and Interfaces, Journal Year: 2023, Volume and Issue: 42, P. 103410 - 103410

Published: Sept. 21, 2023

Language: Английский

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Unravelling the evolution of oxides at the aluminum liquid/vapor interface

Acta Materialia, Journal Year: 2024, Volume and Issue: 266, P. 119707 - 119707

Published: Jan. 26, 2024

Language: Английский

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Inadequacy of Peak Detachment Force in Describing Ice Adhesion Strength: the Critical Role of Shear Force–Time Evolution in Icephobicity Assessment

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Icephobicity encompasses a multifaceted definition that necessitates evaluations across various scales, from single droplets to larger ice specimens. The predominant method for evaluating icephobicity performance is adhesion strength (IAS) testing. Multiple geometries and scales testing are proposed. conventional key parameter derived this test analysis the peak detachment force value, which subsequently converted IAS (stress). Recent studies raise questions regarding approach challenge its adequacy comprehensive assessment. To achieve more profound understanding of phenomena involved, study utilizes three distinct benches, all in horizontal shear geometry but under varying conditions. findings indicate values do not necessarily reflect actual behavior. However, versus time evolution (obtained force–time plots) can provide valuable insights into icephobicity, including viscoelastic response coatings underlying failure mechanisms. beneficial aspects additionally validated context investigating coating durability through consecutive (icing/ice detachment) cycles, wherein methodologies, such as wetting morphological parameters, fail capture deterioration.

Language: Английский

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Icephobic Gradient Polymer Coatings Coupled with Electromechanical De‐icing Systems: A Promising Ice Repellent Hybrid System

Advanced Engineering Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 4, 2024

Icephobic materials and systems are highly desired in regions seasons where daily life activities hindered by the presence of ice. The combination icephobic with active de‐icing systems, known as hybrid is a promising way to optimize efficiency ice removal, while reducing power consumption. However, development limited their lifespan incompatibility most operating mode system. Here we present system comprising gradient polymer coating deposited initiated chemical vapor deposition resonant piezoelectric performance evaluated an icing wind tunnel, capable detaching blocks less than 1 s, regardless type covered area. An in‐depth detachment study confirms that adhesion reduction intrinsic property coating, independent from external factors. nanometric nature enables efficient operation systems. shows outstanding durability against cycles, abrasion, water erosion, delamination. results showcase potential real‐world applications contrast icing.

Language: Английский

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Research on variation in nanopore parameters and surface characteristics of anodic aluminum oxide (AAO) films with time-controlled anodization processes

Journal of Materials Science, Journal Year: 2024, Volume and Issue: 59(23), P. 10556 - 10571

Published: June 1, 2024

Language: Английский

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Withdrawn: Low ice adhesion on soft surfaces: Elasticity or lubrication effects?

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 676, P. 1118 - 1118

Published: July 15, 2024

This article has been withdrawn at the request of author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. full Elsevier Policy on Article Withdrawal can be found https://www.elsevier.com/about/policies/article-withdrawal.

Language: Английский

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Experimental debate on the overlooked fundamental concepts in surface wetting and topography vs. ice adhesion strength relationships

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 682, P. 825 - 848

Published: Nov. 22, 2024

Language: Английский

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