期刊
POWDER TECHNOLOGY
卷 387, 期 -, 页码 277-286出版社
ELSEVIER
DOI: 10.1016/j.powtec.2021.04.028
关键词
Palygorskite; Palygorskite; carbon; polyaniline; Nanoparticle dispersion; Spherical shell; Microwave absorption
资金
- Foundation of State Key Laboratory of HighefficiencyUtilization of Coal and Green Chemical Engineering [2021K19]
- Opening Project of State Key Laboratory of High Performance Ceramics and Superfine Microstructure [SKL202003SIC]
- Anhui International Joint Research Center for Nano Carbonbased Materials and Environmental Health [2020R0109]
- Shenzhen Technology University (SZTU)
- Natural Science Foundation of Top Talent of SZTU [2019010801002]
In this study, palygorskite was modified to prepare Pal/C/PANI ternary composites, which exhibit promising electromagnetic absorption performances with potential applications in microwave absorption.
Palygorskite was coated with a thin layer of carbon by using a hydrothermal process with glucose, in order to form palygorskite/carbon (Pal/C) composites, which were then used as a template to load polyaniline through in-situ polymerization, thus obtaining dispersed spherical shell-shaped palygorskite/carbon/polyaniline (Pal/C/ PANI) ternary composites. The Pal/C/PANI composites exhibit promising electromagnetic absorption performances, which can be optimized by adjusting the content of Pal/C. In this case, palygorskite acts as a skeleton and dispersion agent, which effectively prevents the agglomeration of carbon and polyaniline. Due to the improved impedance matching and increased dielectric loss, the Pal/C/PANI composites display an optimal reflec-tion loss of -74 dB at 6.24 GHz, with a maximum effective absorption bandwidth of 4.96 GHz. Such composites could be candidates as high performance microwave absorbers. (c) 2021 Elsevier B.V. All rights reserved.
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