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Hierarchical Metafabric with Spectral Selectivity and Janus Wettability for Efficient Passive Radiative Cooling and
Meng-Ya Yu1, Jiong Kong1, Zhuo Wang2
1National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215123, China.
ACS Applied Materials & Interfaces
|June 3, 2026
Summary
This study introduces a novel textile that cools the body using passive daytime radiative cooling (PDRC) and manages sweat directionally. The innovative fabric enhances thermal comfort without energy consumption.
Area of Science:
- Materials Science
- Textile Engineering
- Thermal Management
Background:
- Passive daytime radiative cooling (PDRC) textiles offer energy-free personal thermal management.
- Existing PDRC textiles often cause discomfort due to sweat accumulation from hydrophobicity.
Purpose of the Study:
- To develop a hierarchical metafabric integrating efficient radiative cooling with directional sweat management.
- To address the comfort issues associated with conventional PDRC textiles.
Main Methods:
- Fabrication of a hierarchical metafabric using in situ nanoparticle growth and layer-by-layer electrospinning.
- Incorporation of a hydrophilic CaSO3/PA66-SF layer and a hydrophobic Al2O3/PVDF layer.
- Characterization of spectral selectivity, wettability, and sweat transport properties.
Main Results:
- Achieved high solar reflectance (94.2%) and infrared emissivity (97.3%) for efficient radiative cooling.
- Demonstrated Janus wettability with directional sweat transport (one-way transport index of 1074%).
- Exhibited favorable antibacterial activity, mechanical strength, and breathability.
Conclusions:
- The developed metafabric effectively integrates radiative cooling with directional sweat management, enhancing wearing comfort.
- This technology shows significant potential for multifunctional thermohumidity-regulating textiles.
- Offers a zero-energy solution for personal thermal management in textiles.
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