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Nanocellulose-polysilazane single-source-precursor derived defect-rich carbon nanofibers/SiCN nanocomposites with excellent electromagnetic absorption performance

Liu, Xingmin ; Li, Minghang ; Liu, Heqiang ; Duan, Wenyan ; Fasel, Claudia ; Chen, Yongchao ; Qu, Fangmu ; Xie, Wenjie ; Fan, Xiaomeng ; Riedel, Ralf ; Weidenkaff, Anke (2022)
Nanocellulose-polysilazane single-source-precursor derived defect-rich carbon nanofibers/SiCN nanocomposites with excellent electromagnetic absorption performance.
In: Carbon, 188
doi: 10.1016/j.carbon.2021.11.058
Article, Bibliographie

Abstract

Ceramic SiCN nanocomposites modified with nanocellulose derived defect-rich carbon nanofibers (CNFsSiCN) were developed by thermolysis of nanocelulose-polysilazane single-source precursors (SSPs). Multi-loss mechanisms (i.g. polarization loss and conductive loss) were established in the SiCN ceramic nanocomposites by employing the defect-rich structure of CNFs. Cole-Cole circle plots indicate that the CNFs-SiCN ceramics possess strong polarization capability due to the defect-rich structure of the CNFs. Dielectric loss values fitted by the Debye theory showed that the proportion of polarization loss reaches an unprecedented high value, accounting for 52.1% of the total dielectric loss. When the content of nanocellulose is 10 wt% of SSPs, the minimal reflection coefficient (RCmin) and effective absorption bandwidth (EABs) of CNFs-SiCN ceramic can reach -36.3 dB and 3.0 GHz, respectively. This work may contribute new ideas for establishing multi-loss mechanisms in ceramic-based materials, finding a new application for nanocellulose, and shaping the design of novel absorbents.

Item Type: Article
Erschienen: 2022
Creators: Liu, Xingmin ; Li, Minghang ; Liu, Heqiang ; Duan, Wenyan ; Fasel, Claudia ; Chen, Yongchao ; Qu, Fangmu ; Xie, Wenjie ; Fan, Xiaomeng ; Riedel, Ralf ; Weidenkaff, Anke
Type of entry: Bibliographie
Title: Nanocellulose-polysilazane single-source-precursor derived defect-rich carbon nanofibers/SiCN nanocomposites with excellent electromagnetic absorption performance
Language: English
Date: March 2022
Publisher: Pergamon-Elsevier Science
Journal or Publication Title: Carbon
Volume of the journal: 188
DOI: 10.1016/j.carbon.2021.11.058
Abstract:

Ceramic SiCN nanocomposites modified with nanocellulose derived defect-rich carbon nanofibers (CNFsSiCN) were developed by thermolysis of nanocelulose-polysilazane single-source precursors (SSPs). Multi-loss mechanisms (i.g. polarization loss and conductive loss) were established in the SiCN ceramic nanocomposites by employing the defect-rich structure of CNFs. Cole-Cole circle plots indicate that the CNFs-SiCN ceramics possess strong polarization capability due to the defect-rich structure of the CNFs. Dielectric loss values fitted by the Debye theory showed that the proportion of polarization loss reaches an unprecedented high value, accounting for 52.1% of the total dielectric loss. When the content of nanocellulose is 10 wt% of SSPs, the minimal reflection coefficient (RCmin) and effective absorption bandwidth (EABs) of CNFs-SiCN ceramic can reach -36.3 dB and 3.0 GHz, respectively. This work may contribute new ideas for establishing multi-loss mechanisms in ceramic-based materials, finding a new application for nanocellulose, and shaping the design of novel absorbents.

Uncontrolled Keywords: PDCs, Nanocellulose, Carbon nanofibers, Defect-rich, Electromagnetic absorption, Microwave-absorption, Graphene oxide, Microspheres, Aerogels, Morphology, Composite, Ceramics
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 03 Jan 2022 07:36
Last Modified: 03 Jan 2022 07:36
PPN:
Projects: National Natural Science Foundation of China (NSFC), Grant Numbers 52002325, 51332004
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