A biomimetic non-woven fabric with passive thermal-insulation and active heat-recovering

Zizhen Lin, Xiaofan Ping, Dongming Zhao, Zihe Cai, Xingtao Wang, Chi Zhang, Lichuang Wang, Menglei Li, Xiongfei Chen, Jingkai Niu, Yao Xue, Yun Liu, Xinlian Li, Xiaojun Qin, Cheng Chi and Xuankai Zhang

Applied Energy, 2024, vol. 353, issue PA, No S0306261923013910

Abstract: The fiber-based porous materials illustrate the advantages on thermal insulation because of the limited heat convection by porous morphology and the phonon scattering at multi-scale interfaces. However, there is still space for improving thermal insulation by restricting the thermal radiation. In this work, inspired by the architecture configuration of “black body”, a double-wall carbon nanotube (DWCNT) non-woven fabric (CNF) with a gradient-pore configuration is developed to trigger the multiple reflective mechanism of infrared rays, which facilitates the infrared shielding ability, and leads to the ultra-low cross-plane thermal conductivity (k⊥) of 0.022 W m−1 K−1 at room temperature. As a result, the CNF shows a better steady and dynamic thermal-insulation performance than the commercial silica aerogel. In addition to passively insulate heat, the CNF can act as a power generator by leveraging the temperature difference to trigger the thermoelectric effect. A proof-of-concept CNF-based thermoelectric module yields a maximum output power of 42 nW at ∆T=20 K. Moreover, the CNF demonstrates the great mechanical durability, wearability and electrothermal effect, suggesting a promising candidate as a smart textile for personal thermal management.

Keywords: Biomimetic; Thermal-insulation textile; Multiple reflective mechanism; Carbon nanotube film; Personal thermal management (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1016/j.apenergy.2023.122027

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