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Research Article

Multifunctional cellular carbon foams derived from chitosan toward self-cleaning, thermal insulation, and highly efficient microwave absorption properties

Beibei Zhan1Yanling Hao2Xiaosi Qi1( )Yunpeng Qu1Junfei Ding1Jing-liang Yang1Xiu Gong1Yanli Chen1Qiong Peng1Wei Zhong3
College of Physics, Guizhou Province Key Laboratory for Photoelectrics Technology and Application, Guizhou University, Guiyang 550025, China
Minzu Normal University of Xingyi, Xingyi 562400, China
National Laboratory of Solid State Microstructures and Jiangsu Provincial Laboratory for NanoTechnology, Nanjing University, Nanjing 210093, China
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Graphical Abstract

Cellular carbon foams (CCFs) with different porous structures were elaborately designed and fabricated through a facile continuous freeze-drying and carbonization process. And the designed CCFs displayed the outstanding multi-functions including self-cleaning, thermal insulation, lightweight, robust, strong absorption capability, broad absorption bandwidth, and thin matching thickness.

Abstract

To adapt the practical demand, designing and constructing the multifunctional microwave absorbers (MAs) is the key future direction of research and development. However, effective integrating the multiple functions into a single material remains a huge challenge. Herein, cellular carbon foams (CCFs) with different porous structures were elaborately designed and fabricated in high efficiency through a facile continuous freeze-drying and carbonization processes using a sustainable biomass chitosan as the precursor. The obtained results revealed that the thermal treated temperature and g-C3N4 amount played a great impact on the carbonization degrees, pore sizes, and morphologies of CCFs, which led to their tunable electromagnetic (EM) parameters, improved conduction loss, and polarization loss abilities. Owing to the special cellular structure, the designed CCFs samples simultaneously displayed the strong absorption capabilities, broad absorption bandwidths, and thin matching thicknesses. Meanwhile, the as-prepared CCFs exhibited the strong hydrophobicity and good thermal insulation, endowing its attractive functions of self-cleaning and thermal insulation. Therefore, our findings not only presented a facile approach to produce different porous structures of CCFs, but also provided an effective strategy to develop multifunctional high-performance MAs on basis of three-dimensional CCFs.

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Nano Research
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Cite this article:
Zhan B, Hao Y, Qi X, et al. Multifunctional cellular carbon foams derived from chitosan toward self-cleaning, thermal insulation, and highly efficient microwave absorption properties. Nano Research, 2024, 17(3): 927-938. https://doi.org/10.1007/s12274-023-6236-7
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Received: 30 August 2023
Revised: 26 September 2023
Accepted: 26 September 2023
Published: 30 November 2023
© Tsinghua University Press 2023
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