Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 133, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2020.105866
Keywords
Carbon nanotubes; Polymer-matrix composites; Magnetic properties; Microwave absorption performance
Funding
- National Natural Science Foundation of China [U1664251, 51873011]
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The magnetic ZnFe2O4 nanoparticles were synthesized and combined with carbon nanotubes (CNTs) to form a unique tangled structure (ZnFe2O4@CNT), and then used as wave absorbing functional nanofillers of polyvinylidene fluoride (PVDF) matrix. The effects of ZnFe2O4@CNT functional nanofillers on the microstructure, crystallization behavior and electromagnetic wave absorption properties of PVDF were studied. The ZnFe2O4@CNT/PVDF composite membranes containing 7 wt% nanofillers presented an optimal reflection loss of -54.5 dB with a sample thickness of 2.4 mm when the processing temperature was 60 degrees C. If the processing temperature of 150 degrees C was adopted, the composite membranes with a thickness of only 2.0 mm surprisingly achieved an effective absorption of the whole X-band. The combination of interfacial polarization, polarization relaxation loss, dipole polarization, conductivity loss, and ferromagnetic resonance loss promoted the excellent microwave energy dissipation capacity of ZnFe2O4@CNT/PVDF system.
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