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Unravelling the mystery of fish scales in lowering ice adhesion

揭示鱼鳞降低冰黏附力的奥秘

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Abstract

The influence of static surface properties, such as free energy, toughness, and elasticity, on icephobicity has been extensively studied and documented in existing literature. However, there remains limited understanding of the role played by surface dynamic characteristics in facilitating ice removal. This study investigates the ice adhesion strength of authentic Arctic salmon (Salmon salar) skin, revealing intriguing anisotropic ice adhesion behavior. Results indicate a significant decrease in ice adhesion strength (141 ± 47 kPa) when sheared against the growth orientation of fish scales compared with shearing along this orientation (353 ± 95 kPa). The distinctive structural evolution of fish scales during shearing can lead to a sequential rupture process, thereby diminishing ice adhesion. Additionally, the study highlights the significance of the opening and peeling capacity of fish scales in controlling ice detachment, defined as the ability of unit scales to separate from their underlying structures and adhesives under applied force. Enhancing this capacity could further reduce ice adhesion strength (66 ± 15 kPa), facilitating effortless ice detachment on fish scales. The mechanical robustness of fish scales offers new possibilities for designing hard and durable anti-icing surfaces.

摘要

近几十年来, 大量的研究文献表明, 研究人员一直在探究静态表 面特性(包括自由能、韧性和弹性)对疏冰性的影响. 然而, 对于动态表 面特性在辅助除冰方面的理解非常有限. 在本工作中, 我们重点研究了 北三文鱼表皮的冰黏附强度, 并且观察到了有趣的各向异性的冰黏附 行为. 与顺着鱼鳞生长方向的冰黏附强度(353 ± 95 kPa)相比, 逆着鱼 鳞生长方向的冰黏附强度(141 ± 47 kPa)降低了60%. 我们发现, 鱼鳞在 受到剪切力的过程中, 会发生独特的结构演变, 从而导致界面连续断裂, 有利于降低冰的黏附性. 研究发现, 鱼鳞的张开和剥离能力(描述了鳞 片在外力下与其下部鳞片和黏结物分离的趋势)可以调控冰的脱落. 通 过提高鱼鳞的张开和剥离能力, 可以在鱼鳞上实现更低的冰黏附强度 (66 ± 15 kPa)和更为容易的除冰过程. 由于鱼鳞具有出色的机械鲁棒 性, 这一发现为设计坚硬耐用的防覆冰表面提供了新的视角.

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Acknowledgements

The Norwegian Research Council is acknowledged for its support of the NANO2021 Project Dual-Functional Anti-Gas Hydrate Surfaces (DAndra, 302348), the FRIPRO Project towards the Design of Super-Low Ice Adhesion Surfaces (SLICE, 250990), and the Norwegian Micro-and Nano-Fabrication Facility, NorFab (295864).

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Authors and Affiliations

Authors

Contributions

Author contributions Wang F, Liu S, and Xiao S designed the experiments. Wang F prepared the samples and performed the measurement and characterization with most of the analysis. Wang F wrote the paper with support from Skallerud B, Zhang Z, and He J. Zhang Z and He J provided financial support. All authors contributed to the general discussion.

Corresponding authors

Correspondence to Zhiliang Zhang  (张志良) or Jianying He  (何健英).

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Conflict of interest The authors declare that they have no conflict of interest.

Additional information

Supplementary information Experimental details and supporting data are available in the online version of the paper.

Feng Wang received his BE degree from Wuhan University of Science and Technology, China, and MSc degree from Shanghai University, China. From 2016 to 2017 he worked at Shanghai Institute of Ceramics, Chinese Academy of Sciences, China. From 2017 to 2020 he undertook a PhD project at the Department of Structural Engineering, Norwegian University of Science and Technology (NTNU), where he developed dynamic anti-icing surfaces for mitigating icing problem. His current focus is on discovering novel anti-icing surfaces through enabling dynamic evolutions at ice-substrate interfacial region.

Zhiliang Zhang received his BSc and MSc degrees from Tongji University, China, and his PhD degree from Lappeenranta University of Technology, Finland in 1994. He then worked as a research scientist and senior research scientist at SINTEF Materials and Chemistry, Trondheim, Norway before he was appointed as a full professor of NTNU in 2003. He was the founder of NTNU Nanomechanical Lab. His research group currently focuses on the material property-structure relationships, anti-icing materials, antigas hydrate surfaces, and nanostructured functional materials for energy applications.

Jianying He received her PhD degree in structural engineering from NTNU in 2009. She has been an assistant professor at the University of Science and Technology Beijing (2003–2006), a postdoctoral fellow at NTNU (2009–2011), an associate professor at NTNU (2011–2017), and since 2017, a professor in nanomechanics at NTNU. Her current research area includes nanostructured materials, nanotechnology for petroleum engineering, and nano-enabled icephobicity.

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Unravelling the mystery of fish scales in lowering ice adhesion

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Wang, F., Liu, S., Xiao, S. et al. Unravelling the mystery of fish scales in lowering ice adhesion. Sci. China Mater. (2024). https://doi.org/10.1007/s40843-024-2828-0

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