Scalable-manufactured and mechanical-robust superhydrophobic hierarchical material toward self-cleaning passive cooling

Sun, Haoxuan; Yang, Fan; Chen, Shuangjun; Zhang, Jun

doi:10.1016/j.compositesa.2023.107750

Cited by 2 publications

(2 citation statements)

References 34 publications

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“…The samples were immersed in these solutions for durations ranging from 12 to 120 h, followed by measurements of the WCA and WSA using an SDC-100 contact angle tester and digital display inclinometer after drying. Additionally, the long-term durability of the sample was characterized by subjecting it to the impact of water drops at a rate of 500 mL/min from a height of 1 m, and sand drops at 1000 g/min on the coating surface using an hourglass …”

Section: Experimental Methodsmentioning

confidence: 99%

“…Additionally, the long-term durability of the sample was characterized by subjecting it to the impact of water drops at a rate of 500 mL/min from a height of 1 m, and sand drops at 1000 g/min on the coating surface using an hourglass. 43 Ice Suppression Performance Test. The freezing process of a 6 μL droplet on the sample surface was observed by using an HV4800 electron microscope (Guangdong, China).…”

Section: ■ Introductionmentioning

confidence: 99%

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Efficient Anti-Icing of a Stable PFA Coating for Wind Power Turbine Blades

Zhang,

Wang,

Wang

et al. 2024

Langmuir

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Superhydrophobic coatings are increasingly recognized as a promising approach to enhancing power generation efficiency and prolonging the operational lifespan of wind turbines. In this research, a durable superhydrophobic perfluoroalkoxy alkane (PFA) coating was developed and specifically designed for spray application onto the surface of wind turbine blades. The PFA coating features a micronano hierarchical structure, exhibiting a high water contact angle of 167.0°and a low sliding angle of 1.7°. The optimal PFA coating exhibits stability and maintains a superhydrophobic performance during mechanical and chemical tests. The findings of this study establish a positive association between the surface energy of the coating and its effectiveness in anti-icing. The delayed icing time for the PFA-coated surface is 46.83 times longer than that of an uncoated surface, and the ice adhesion strength is only 1.875 kPa. Additionally, the PFA coating demonstrates remarkably high ice suppression efficiencies of 94.7 and 99.5% in anti-icing experiments at ambient temperatures of −6 and −10 °C, respectively. It is anticipated that this stable superhydrophobic PFA coating will be a candidate for anti-icing applications in wind turbine blades.

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Section: Experimental Methodsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Efficient Anti-Icing of a Stable PFA Coating for Wind Power Turbine Blades

Zhang,

Wang,

Wang

et al. 2024

Langmuir

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Scalable, Controlled Bimodal Pore-Structured Polymer Coating for Efficient Passive Daytime Radiative Cooling

Wang,

Luo,

et al. 2024

ACS Appl. Mater. Interfaces

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Outdoor thermal irritation poses a serious threat to public health, with the frequent occurrence of increasingly intense heat waves. With the global goal of carbon peaking and carbon neutrality, there is an urgent need for a strategy that is efficient and can provide localized outdoor cooling without an intensive energy input. This paper demonstrated a rapidly formable polyurethane-based coating with controlled bimodal spherical micropores. Nano-Al 2 O 3 particles (300 nm) embedded in the polymer were used for targeted enhancement of reflectance at 0.38−0.5 wavelengths. The enhanced film reflected 93% solar irradiance and selectively transmitted 95% thermal radiation (8−13 μm), enabling rapid cooling and the creation of a comfortable thermal microclimate to avoid overheating of 6−11 °C during daytime conditions. The ultrawide material compatibility and excellent adaptive mechanical strength of polyurethane-based coatings are expected to benefit the sustainable development of society in a wide range of fields, from health to economics.

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Scalable-manufactured and mechanical-robust superhydrophobic hierarchical material toward self-cleaning passive cooling

Cited by 2 publications

References 34 publications

Efficient Anti-Icing of a Stable PFA Coating for Wind Power Turbine Blades

Efficient Anti-Icing of a Stable PFA Coating for Wind Power Turbine Blades

Scalable, Controlled Bimodal Pore-Structured Polymer Coating for Efficient Passive Daytime Radiative Cooling

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