Biomimetic Multifunctional Graphene-Based Coating for Thermal Management, Solar De-Icing, and Fire Safety: Inspired from the Antireflection Nanostructure of Compound Eyes.

Autor: Cui T; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Zheng Y; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Hu M; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Lin B; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Wang J; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Cai W; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China.; School of Fashion and Textiles, The Hong Kong Polytechnic University, Hong Kong, SAR, 999077, China., Fei B; School of Fashion and Textiles, The Hong Kong Polytechnic University, Hong Kong, SAR, 999077, China., Zhu J; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China., Hu Y; State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei, 230026, P. R. China.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Aug; Vol. 20 (35), pp. e2312083. Date of Electronic Publication: 2024 Apr 22.
DOI: 10.1002/smll.202312083
Abstrakt: Due to the ubiquitous and inexhaustible solar source, photothermal materials have gained considerable attention for their potential in heating and de-icing. Nevertheless, traditional photothermal materials, exemplified by graphene, frequently encounter challenges emanating from their elevated reflectance. Inspired by ocular structures, this study uses the Fresnel equation to enhance the photo-thermal conversion efficiency of graphene by introducing a polydimethylsiloxane (PDMS)/silicon dioxide (SiO 2 ) coating, which reduces the light reflectance (≈20%) through destructive interference. The designed coating achieves an equilibrium temperature of ≈77 °C at one sun and a quick de-icing in ≈65 s, all with a thickness of 5 µm. Simulations demonstrate that applying this coating to high-rise buildings results in energy savings of ≈31% in winter heating. Furthermore, the combination of PDMS/SiO 2 and graphene confers a notable enhancement in thermal stability through a synergistic flame-retardant mechanism, effectively safeguarding polyurethane against high temperatures and conflagrations, leading to marked reduction of 58% and 28% in heat release rate and total heat release. This innovative design enhances the photo-thermal conversion, de-icing function, and flame retardancy of graphene, thereby advancing its applications in outdoor equipment, high-rise buildings, and aerospace vessels.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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