Journal
NANOSCALE
Volume 6, Issue 12, Pages 6440-6447Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4nr00353e
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Funding
- NSFC [50973028]
- SNSF [12ZR1407900]
- Shanghai Municipal Education Commission [12ZZ049]
- Science and Technology Commission of Shanghai [13JC1402002]
- China Scholarship Council
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Ferromagnetic gamma-Fe2O3 nanoparticles were successfully loaded into multi-walled carbon nanotubes (MWNTs) as probed by transmission electron microscopy. Upon incorporation of the gamma-Fe2O3-MWNTs into poly(p-phenylenebenzobisoxazole) (PBO), a conjugated polymer with high mechanical strength and outstanding thermal and oxidative stability, microwave absorbing materials were obtained. Attributed to the special structure of the gamma-Fe2O3-MWNTs, synergistic effects on dielectric loss and magnetic loss, and a better matched characteristic impedance of the composites were achieved. The optimal minimum reflection loss reached -32.7 dB at 12.09 GHz on a composite containing 12 wt% gamma-Fe2O3-MWNTs with a thickness of 2.7 mm, and the corresponding bandwidth below -5 dB was 6.2 GHz. This demonstrated its potential applications as a low-density microwave absorbing material operating under extreme environments.
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