Robust Photothermal Icephobic Surface with Mechanical Durability of Multi‐Bioinspired Structures

Author:

Zhou Maolin1,Zhang Lei1,Zhong Lieshuang1,Chen Mingshuo1,Zhu Lingmei1,Zhang Tiance1,Han Xuefeng1,Hou Yongping1,Zheng Yongmei1ORCID

Affiliation:

1. Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University (BUAA) Beijing 100191 P. R. China

Abstract

AbstractPhotothermal superhydrophobic surfaces are potential to become ideal anti‐/deicing surfaces due to their rapid water removal, icing delay, and photothermal deicing performance. Here, a robust photothermal icephobic surface with mechanical durability is shown that is integrated with a microspine array inspired by honeycomb and cactus thorn (i.e., MAHC), which is developed by a laser‐layered microfabrication strategy. The maximum stress on the microspine of the MAHC is reduced by ≈2/3, due to the protection of the bionic honeycomb structure. Even after 200 linear abrasions by a steel blade, the MAHC remains superior water repellency with a water contact angle of 150.7° and roll‐off angles of 10.3°, stable icing delay time (578.2 s), and rapidly photothermal deicing capabilities (401 s). As the MAHC is fabricated on a curvature surface such as a copper alloy transmission line for an overhead high‐speed rail, a stable photothermal anti‐/deicing in a low‐temperature environment still can be achieved effectively. The freezing rain covering the functional transmission line completely slides off within 758 s under one sun illumination. This studying offers insight into the design of novel materials with stable anti‐icing/icephobic structures, which would be extended into some applied realms, for example, transportation fields or power systems in cold or low‐temperature climates.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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