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Adaptive and Highly Efficient Thermoregulation Based on Multi-Dimensional Janus Film
Yuqing Shi1,2, Yuting Fu3, Xiong Yu1
1School of Microelectronics, Southern University of Science and Technology, Shenzhen, China.
Abstract:
Thermoregulation has attracted tremendous research attention as one of the eco-friendly and sustainable strategies for temperature modulation. While most of the thermoregulation devices possess static cooling capabilities, the adaptability during nighttime or winter conditions is largely limited. Herein, we introduce a switchable dual-mode thermoregulation system based on TiO2/MXene/PDMS (TMP) Janus film. Attributed to the strong solar scattering effect of TiO2 fillers and the intrinsically high mid-infrared emissivity of the PDMS matrix, the TMP Janus film achieves a high solar reflectivity of 97% while maintaining a high MIR emissivity of 91% in cooling mode, and absorbs approximately 91% of solar irradiation in heating mode. By further integration with smart control modules, it allows autonomous switch between cooling and heating modes, which provides adaptive temperature regulation for practical applications. An ultra-wide temperature regulation range with sub-ambient cooling up to 17.89°C and above-ambient heating up to 13.82°C were demonstrated. The proposed reversible thermoregulation Janus film offers a sustainable and effective strategy toward eco-friendly and intelligent indoor temperature regulation.
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