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Chemical Engineering Journal

Chemical Engineering Journal

IF: 13.3
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Waxberry-liked micro-nanostructured, superhydrophobic surfaces with enhanced photothermal de-icing and passive anti-icing properties

Published:6 December 2024 DOI: 10.1016/j.cej.2024.158358
Siyu Liu, Zhongzheng Zhu, Qitan Zheng, Kaifeng Wang, Feng Zhou, Qiuming Yang, Xinyi Wang, Lu Ye, Yujie Chen, Hezhou Liu, Hua Li

Abstract

Superhydrophobic surfaces (SHSs), as one of the most promising passive anti-icing materials, suffer from unavoidable icing under high-humidity cool environment. Photothermal de-icing capability with robust light absorption feature is thereby necessitated to integrate into SHSs to ensure maximum icephobic performance. Herein, a facile strategy of using polyurethane and synthesized waxberry-liked Co3O4 nanoparticles (WCNPs) to construct hierarchical micro-nanostructured composites exhibiting superhydrophobic, photothermal and “l(fā)ight-trapping” properties is proposed. WCNPs self-assemble from nanoscale spheres, inherently possessing a hierarchical micro-nano structure. Sophisticated surface structure created by abundant WCNPs with unique intrinsic hierarchical morphology provides the composites with both excellent water repellency and impressive “l(fā)ight-trapping” capability of 92.7?% light absorptivity. Besides, WCNPs are covered by self-polymerized tannic acid layer interconnected with octadecylamine, which further facilitates the hydrophobic properties. In high-humidity (95?%) environments at ?10 ℃, ice delay time can be enhanced to 802?s, while the melting time under 1 sun irradiation for ice crystal and layer are only 156?s and 370?s, respectively. Furthermore, reliabilities of the coating are verified by comprehensive durability assessments, including wear resistance, adhesion and icing/deicing cycle tests. This study constructs a surface micro-nano layer structure to absorb the abundant solar energy in nature and transform it into heat, providing a promising solution in anti-icing and de-icing fields.

Substances (2)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Ethanol 64-17-5 C2H6O 808 suppliers $10.00-$17310.00
Urea 57-13-6 CH4N2O 780 suppliers $5.00-$9263.00

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