Round-Robin Study for Ice Adhesion Tests

Aerospace, Journal Year: 2024, Volume and Issue: 11(2), P. 106 - 106

Published: Jan. 24, 2024

Ice adhesion tests are widely used to assess the performance of potential icephobic surfaces and coatings. A great variety test designs have been developed over past decades due lack formal standards for these types tests. In many cases, aim research was not only determine ice values, but also understand key surface properties correlated low surfaces. Data from different measurement techniques had correspondence between results: Values varied by orders magnitude showed relative relationships one another. This study sought provide a broad comparison testing approaches conducting with identical total 15 facilities participated in this round-robin study, results 13 partners summarized paper. For series, (impact static) as well parameters were harmonized minimize deviations setups. Our findings presented paper, ice- test-specific discussed. can improve our understanding support standardization process strength measurements.

Language: Английский

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Icephobic Gradient Polymer Coatings Deposited via iCVD: A Novel Approach for Icing Control and Mitigation

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(9), P. 11901 - 11913

Published: Feb. 24, 2024

Materials against ice formation and accretion are highly desirable for different industrial applications daily activities affected by icing. Although several concepts have been proposed, no material has so far shown wide-ranging icephobic features, enabling durability manufacturing on large scales. Herein, we present gradient polymers made of 1,3,5,7-tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane (V

Language: Английский

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Tensile Ice Adhesion of Bulk Water Ice on Flat and Microstructured Hydrophobized Polymer Surfaces vs. Reference Materials

Surfaces and Interfaces, Journal Year: 2025, Volume and Issue: unknown, P. 106019 - 106019

Published: Feb. 1, 2025

Language: Английский

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Chitosan electrolyte hydrogel with low ice adhesion properties

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2024, Volume and Issue: 700, P. 134695 - 134695

Published: July 3, 2024

Icephobic materials can prevent or reduce ice formation, e.g. by ensuring easy detachment, a desirable property for those applications where accumulation is critical to human safety. Herein, we develop chitosan electrolyte hydrogel create bio-based surface with low adhesion. The physically crosslinked and infused salted water at concentrations from 4.5 30 g/L, including that of seawater (23 g/L). Depending on salt content in the hydrogel, could obtain very adhesion down 140 kPa (at – 10°C). We hypothesize exploits colligative properties avoiding nucleation ice-hydrogel interface. To confirm hypothesis, investigate structure contact angles analysis, DSC, TGA, FTIR, XRD, rheometry mechanical properties. quantify presence non-freezing water, which creates lubricating liquid layer interface, affecting detachment mechanism lowering In conclusion, proposed presents cost-efficient strategy across various icing scenarios systems operating humid marine environments, such as offshore platforms ships.

Language: Английский

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Icephobic coatings beyond boundaries: Layered integration of phase change materials beneath a PEG-PDMS copolymer–containing coating to enhance anti-icing performance

Progress in Organic Coatings, Journal Year: 2024, Volume and Issue: 189, P. 108324 - 108324

Published: Feb. 19, 2024

To enhance the anti-icing capabilities of aqueous self-lubricating coatings, we harnessed synergistic potential multiple icephobic methods. We adopted a layer-by-layer technique to maximize icephobicity surface using phase change materials (PCMs). used solid-state nuclear magnetic resonance (NMR) spectroscopy confirm presence quasi-liquid layer on coating containing PEG-PDMS copolymer. NMR spectra this showed non-frozen water retained at interface, even subzero temperatures. Differential scanning calorimetry demonstrated that delayed ice nucleation because its viscosity. Placing PCM-containing beneath reduced temperature and extended complete freezing time droplets. These enhanced properties occurred latent heat release by PCMs, which extends preservation liquid-like over longer period. The also heightened overlying PEG-PDMS-containing coating, further reducing adhesion accumulation. Ice strength varied minimally among most concentrations PCM in underlying after repeated icing/de-icing cycles; however, 50 % sample lower durability, reflecting an adverse effect high mechanical coating. Employing hybrid approach provides new avenue for fabricating coatings. This methodology can potentially overcome constraints associated with individual techniques produce durable coatings improved performance.

Language: Английский

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Why the adhesion strength is not enough to assess ice adhesion on surfaces

Applied Surface Science, Journal Year: 2024, Volume and Issue: 672, P. 160740 - 160740

Published: July 24, 2024

The interest in the development of icephobic surfaces has pushed towards definition standardized processes and parameters to assess ice adhesion, with ambition identifying an equivalent method contact angle measurements used wetting properties. Although most studies focus on average adhesion strength, measured as force per unit area required detach ice, much less attention is paid interfacial toughness, perhaps its measurement challenging. In this article, we provide a conceptual framework correctly measure both strength even using simple push test method, laying ground for complete comprehensive assessment surface icephobicity.

Language: Английский

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

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 677, P. 494 - 503

Published: Aug. 9, 2024

Soft materials are promising candidates for designing passive de-icing systems. It is unclear whether low adhesion on soft surfaces due to elasticity or lubrication, and how these properties affect the ice detachment mechanism. This study presents a systematic analysis of with different lubricant content better understand underpinning interaction.

Language: Английский

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Role of Intermediate Wetting States in Ice Adhesion and Debonding Mechanisms: An Experimental and Numerical Investigation

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136669 - 136669

Published: March 1, 2025

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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Passive Ice Protection Systems for Unmanned Aerial Vehicles Applications: A Review

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract Unmanned aerial vehicles (UAVs) are promising platforms for operations in alpine regions due to their compact size, advanced camera systems, and ability take off land confined areas. In such conditions, one of the most significant challenges UAVs is operating icing environments, as ice accretion can compromise aerodynamics propellers potentially lead fto a loss control vehicle failure. To date, active de‐icing solutions, electrothermal have been employed aeronautical sector; however, these systems energy‐intensive. This review addresses passive protection from material science prospective, by focusing on coatings which mitigate formation without energy consumption. A comprehensive description strategies design an icephobic surface presented state‐of‐the‐art analyzed, superhydrophobic surfaces, elastomers, liquid infused gels, polyelectrolytes, sol gel coatings, metal‐organic frameworks. key focus devoted characterizations assessing mitigation i.e., contact angle hysteresis measurements, correlation between durability number cycles. The relevant solutions described final part this review.

Language: Английский

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