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A Self-Cleaning Janus Textile for Highly Efficient Heating and Cooling Management.
Li Yuan1, Siyuan Jia1, Sujin Shao1
1Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, State Key Laboratory of Mechanics and Control for Aerospace Structures, and International Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
Nano Letters
|May 2, 2025
Summary
This study introduces a Janus textile for advanced outdoor thermal management, offering both solar heating and radiative cooling. The innovative textile demonstrates significant temperature regulation capabilities and maintains performance after washing.
Area of Science:
- Materials Science
- Textile Engineering
- Nanotechnology
Background:
- Outdoor thermal management textiles are crucial for regulating temperature.
- Existing textiles require enhanced optical performance and versatility for broader applications.
Purpose of the Study:
- To develop a Janus textile with dual solar heating and radiative cooling functionalities.
- To improve optical performance, stability, and add self-cleaning properties to thermal management textiles.
Main Methods:
- Fabrication of a Janus textile using a porous poly(vinylidene fluoride-co-hexafluoropropylene) cooling layer and a copper-nanoparticle heating layer.
- Evaluation of optical properties including solar reflectance, emissivity, and absorption.
- Assessment of thermal performance through field tests and washing cycle stability tests.
- Characterization of surface properties for hydrophobicity, oleophobicity, and fouling resistance.
Main Results:
- The cooling layer achieved 96.4% solar reflectance and 95.3% mid-infrared emissivity.
- The heating layer exhibited 95.5% solar absorption and 89.1% mid-infrared reflectance.
- The textile maintained stable performance after 30 washing cycles.
- Field tests showed temperature differentials of +41.1 °C (heating) and -4.5 °C (cooling) relative to ambient conditions.
- The textile extended the thermal regulation range by 26.6 °C compared to cotton.
Conclusions:
- The developed Janus textile offers superior dual solar heating and radiative cooling capabilities.
- The textile demonstrates excellent stability, self-cleaning properties, and an extended thermal regulation range.
- This design presents a sustainable solution for advanced outdoor thermal management.
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