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Multifunctionalization is the development direction of personal thermal energy regulation equipment in the future. However, it is still a huge challenge to effectively integrate multiple functionalities into one material. In this study, a simple thermochemical process was used to prepare a multifunctional SiC nanofiber aerogel spring (SiC NFAS), which exhibited ultralow density (9 mg/cm3), ultralow thermal conductivity (0.029 W/(m·K) at 20 ℃), excellent ablation and oxidation resistance, and a stable three-dimensional (3D) structure that composed of a large number of interlacing 3C-SiC nanofibers with diameters of 300-500 nm and lengths in tens to hundreds of microns. Furthermore, the as-prepared SiC NFAS displayed excellent mechanical properties, with a permanent deformation of only 1.3% at 20 ℃ after 1000 cycles. Remarkably, the SiC NFAS exhibited robust hyperelasticity and cyclic fatigue resistance at both low (~ -196 ℃) and high (~700 ℃) temperatures. Due to its exceptional thermal insulation performance, the SiC NFAS can be used for personal thermal energy regulation. The results of the study conclusively show that the SiC NFAS is a multifunctional material and has potential insulation applications in both low- and high-temperature environments.


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Ultralight and hyperelastic SiC nanofiber aerogel spring for personal thermal energy regulation

Show Author's information Limeng SONGaBingbing FANa( )Yongqiang CHENa,dQiancheng GAOcZhe LIcHailong WANGaXinyue ZHANGa,cLi GUANcHongxia LId( )Rui ZHANGa,b( )
School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, China
School of Materials Science and Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450015, China
Sinosteel Luoyang Institute of Refractories Research Co., Ltd., Luoyang 471039, China

Abstract

Multifunctionalization is the development direction of personal thermal energy regulation equipment in the future. However, it is still a huge challenge to effectively integrate multiple functionalities into one material. In this study, a simple thermochemical process was used to prepare a multifunctional SiC nanofiber aerogel spring (SiC NFAS), which exhibited ultralow density (9 mg/cm3), ultralow thermal conductivity (0.029 W/(m·K) at 20 ℃), excellent ablation and oxidation resistance, and a stable three-dimensional (3D) structure that composed of a large number of interlacing 3C-SiC nanofibers with diameters of 300-500 nm and lengths in tens to hundreds of microns. Furthermore, the as-prepared SiC NFAS displayed excellent mechanical properties, with a permanent deformation of only 1.3% at 20 ℃ after 1000 cycles. Remarkably, the SiC NFAS exhibited robust hyperelasticity and cyclic fatigue resistance at both low (~ -196 ℃) and high (~700 ℃) temperatures. Due to its exceptional thermal insulation performance, the SiC NFAS can be used for personal thermal energy regulation. The results of the study conclusively show that the SiC NFAS is a multifunctional material and has potential insulation applications in both low- and high-temperature environments.

Keywords:

SiC nanofiber aerogel spring (SiC NFAS), mechanical property, thermal insulation, personal thermal energy regulation
Received: 25 February 2022 Revised: 18 April 2022 Accepted: 27 April 2022 Published: 18 July 2022 Issue date: August 2022
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Publication history

Received: 25 February 2022
Revised: 18 April 2022
Accepted: 27 April 2022
Published: 18 July 2022
Issue date: August 2022

Copyright

© The Author(s) 2022.

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. U2004177 and U21A2064) and Outstanding Youth Fund of the National Science Fundation of Henan Province (No. 212300410081).

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