期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 608, 期 -, 页码 2203-2212出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.10.006
关键词
Electromagnetic wave absorption; Carbon fibers; CoNi alloy; Polypyrrole
资金
- National Natural Science Foundation of China [51503116]
In this study, N-doped carbon fibers embedded with CoNi alloy particles were synthesized, and conductive polypyrrole-coated CoNi/C fibers were prepared. The resulting composites showed outstanding electromagnetic wave absorption properties, attributed to the synergistic effect between CoNi, N-doped carbon fibers, and PPy. The study demonstrates the effectiveness of embedding magnetic alloy particles in carbon fibers coated with conductive polymers for constructing lightweight and efficient electromagnetic wave absorption materials.
Increasing electromagnetic (EM) radiation has driven the rapid development of carbon-based EM wave absorption materials, but the design of light-weight and efficient carbon-based materials remains a huge challenge. Herein, N-doped carbon fibers embedded with CoNi alloy particles (CoNi/C fibers) were synthesized via electrospinning technology and carbonization. Then, conductive polypyrrole-coated CoNi/C fibers (CoNi/C@PPy composites) were synthesized by chemical polymerization. As-synthesized CoNi/C@PPy composites showed outstanding EM wave absorption property due to the synergistic effect between CoNi, N-doped carbon fibers and PPy. The optimal reflection loss (RL) is -68.78 dB (12.90 GHz) with the thickness of 2.43 mm and the low filler loading of 15 wt%. The widest effective absorption bandwidth (EAB) is 5.62 GHz with the thickness of 2.10 mm and the low filler loading of 20 wt%. The outstanding EM wave absorption property is mainly attributed to 3D network structure, great impedance matching and strong dielectric loss. The results showed that embedding magnetic alloy particles in carbon fibers coated with conductive polymers is an effective strategy for constructing efficient lightweight EM wave absorption materials. (C) 2021 Elsevier Inc. All rights reserved.
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