Issue

Vol. 15 (2023)

Superelastic Radiative Cooling Metafabric for Comfortable Epidermal Electrophysiological Monitoring

https://doi.org/10.1007/s40820-023-01156-9
Jiancheng Dong
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Yidong Peng
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Yiting Zhang
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Yujia Chai
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Jiayan Long
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Yuxi Zhang
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Yan Zhao
College of Energy Material and Chemistry, College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, People’s Republic of China
Yunpeng Huang
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China
Tianxi Liu
Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, People’s Republic of China

Corresponding Author: Tianxi Liu

txliu@jiangnan.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 181

Abstract

Epidermal electronics with superb passive-cooling capabilities are of great value for both daytime outdoor dressing comfort and low-carbon economy. Herein, a multifunctional and skin-attachable electronic is rationally developed on a porous all-elastomer metafabric for efficient passive daytime radiative cooling (PDRC) and human electrophysiological monitoring. The cooling characteristics are realized through the homogeneous impregnation of polytetrafluoroethylene microparticles in the styrene–ethylene–butylene–styrene fibers, and the rational regulation of microporosity in SEBS/PTFE metafabrics, thus synergistically backscatter ultraviolet–visible–near-infrared light (maximum reflectance over 98.0%) to minimize heat absorption while efficiently emit human-body midinfrared radiation to the sky. As a result, the developed PDRC metafabric achieves approximately 17 °C cooling effects in an outdoor daytime environment and completely retains its passive cooling performance even under 50% stretching. Further, high-fidelity electrophysiological monitoring capability is also implemented in the breathable and skin-conformal metafabric through liquid metal printing, enabling the accurate acquisition of human electrocardiograph, surface electromyogram, and electroencephalograph signals for comfortable and lengthy health regulation. Hence, the fabricated superelastic PDRC metafabric opens a new avenue for the development of body-comfortable electronics and low-carbon wearing technologies.


Highlights:
1 Efficient sunlight reflectivity and high mid-infrared radiation emissivity are simultaneously realized in a nonwoven metafabric via PTFE microparticle impregnation and thermal-fusion.
2 The metafabric achieves a maximum cooling effect of 17 °C and fully retains its passive cooling performance even under 50% stretching.
3 High-quality electrophysiological monitoring of ECG, sEMG and EEG is realized through compact and homogeneous encapsulation of liquid metal on the elastomeric fibers.

Keywords

Passive radiative cooling Human electrophysiological monitoring Superelastic metafabrics Spectrally selective reflecting microfibers Liquid metals
Dong, Jiancheng, Yidong Peng, Yiting Zhang, Yujia Chai, Jiayan Long, Yuxi Zhang, Yan Zhao, Yunpeng Huang, and Tianxi Liu. 2023. “Superelastic Radiative Cooling Metafabric for Comfortable Epidermal Electrophysiological Monitoring”. Nano-Micro Letters 15 (July):181. https://doi.org/10.1007/s40820-023-01156-9.
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