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Designing the Future of Cooling: Superhydrophobic Passive Daytime Radiative Cooling Systems
Numan Ahmed1,2, Xinhong Xiong1,2, Luzhi Zhang1,2
1Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China Huzhou, Huzhou 313000, China.
ACS Applied Materials & Interfaces
|April 30, 2025
Summary
Superhydrophobic passive daytime radiative cooling (SH-PDRC) enhances cooling performance by repelling dust and contaminants. This review details SH-PDRC fabrication, materials, and applications for sustainable, electricity-free cooling solutions.
Area of Science:
- Materials Science
- Sustainable Energy
- Nanotechnology
Background:
- Passive daytime radiative cooling (PDRC) offers electricity-free cooling but suffers from dust accumulation, reducing efficiency.
- Superhydrophobicity is a promising strategy to mitigate dust contamination and enhance PDRC performance.
- Developing robust and efficient superhydrophobic surfaces is crucial for practical PDRC applications.
Purpose of the Study:
- To review the principles, fabrication strategies, and material innovations of superhydrophobic PDRC (SH-PDRC) systems.
- To explore advanced methods for creating hierarchical structures that optimize radiative cooling properties and water repellency.
- To provide guidelines for researchers on fabricating durable and efficient SH-PDRC systems.
Main Methods:
- Exploration of advanced fabrication techniques such as electrohydrodynamics, phase separation, and chemical vapor deposition.
- Investigation of polymeric, inorganic, and hybrid materials for enhanced durability, thermal stability, and environmental resilience.
- Analysis of hierarchical structures designed to maximize solar reflectance, infrared emissivity, and water repellency.
Main Results:
- Superhydrophobic surfaces effectively reduce the impact of dust and environmental contamination on PDRC performance.
- Advanced fabrication methods enable the creation of tailored hierarchical structures for optimized cooling.
- Various material choices offer pathways to achieve long-term performance and environmental resilience in SH-PDRC systems.
Conclusions:
- SH-PDRC systems present a viable approach to overcome the limitations of conventional PDRC, offering enhanced cooling efficiency and durability.
- Material innovation and advanced fabrication are key to realizing the full potential of SH-PDRC for sustainable cooling.
- SH-PDRC technology holds significant promise for diverse applications, including textiles, agriculture, and food preservation.
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