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Abstract
Highlights
The first assembled flexible phase change nonwoven is reported by wet-spinning.
The unprecedented thermal properties of such flexible phase change nonwoven are achieved.
Such phase change nonwoven is highly applicable for mask and cloth intelligent temperature control.
Phase change materials have a key role for wearable thermal management, but suffer from poor water vapor permeability, low enthalpy value and weak shape stability caused by liquid phase leakage and intrinsic rigidity of solid–liquid phase change materials. Herein, we report for the first time a versatile strategy for designed assembly of high-enthalpy flexible phase change nonwovens (GB-PCN) by wet-spinning hybrid graphene-boron nitride (GB) fiber and subsequent impregnating paraffins (e.g., eicosane, octadecane). As a result, our GB-PCN exhibited an unprecedented enthalpy value of 206.0 J g−1, excellent thermal reliability and anti-leakage capacity, superb thermal cycling ability of 97.6% after 1000 cycles, and ultrahigh water vapor permeability (close to the cotton), outperforming the reported PCM films and fibers to date. Notably, the wearable thermal management systems based on GB-PCN for both clothing and face mask were demonstrated, which can maintain the human body at a comfortable temperature range for a significantly long time. Therefore, our results demonstrate huge potential of GB-PCN for human-wearable passive thermal management in real scenarios.
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1 Chinese Academy of Sciences, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309); Chinese Academy of Sciences, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309); University of Chinese Academy of Sciences, Shijingshan District, Beijing, People’s Republic of China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419)
2 Chinese Academy of Sciences, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309)
3 Chinese Academy of Sciences, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309)
4 Chinese Academy of Sciences, State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309); University of Chinese Academy of Sciences, Shijingshan District, Beijing, People’s Republic of China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419)
5 Chinese Academy of Sciences, Liaoning Province Key Laboratory of Thermochemistry for Energy and Materials, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Dalian, People’s Republic of China (GRID:grid.9227.e) (ISNI:0000000119573309); University of Chinese Academy of Sciences, Shijingshan District, Beijing, People’s Republic of China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419)
6 Deakin University, Institute for Frontier Materials, Waurn Ponds, Australia (GRID:grid.1021.2) (ISNI:0000 0001 0526 7079)