Journal
ACS APPLIED NANO MATERIALS
Volume 1, Issue 3, Pages 1116-1123Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.7b00293
Keywords
nickel chains; rotational orientation; broadband; microwave absorption; shielding property
Funding
- National Nature Science Foundation of China [51472012]
- Fundamental Research Funds for the Central Universities
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Chainlike nickel nanostructures were prepared by using an efficient wet chemical method, and Ni/polyvinylidene fluoride (PVDF) composites were fabricated with a rotational orientation in a static magnetic field. The oriented magnetic nanochains in the composites show a uniform distribution without significant agglomeration, which favors the impedance matching and attenuation ability of the absorbents. The Ni/PVDF composite with only a 20 wt % loading of oriented nickel chains exhibits a minimum reflection loss (RL) value of -36.8 dB at 23.2 GHz from 18 to 26.5 GHz, while an optimal RL of -37.3 dB is obtained at 35.6 GHz with a 10 wt % loading from 26.5 to 40 GHz. Moreover, an excellent electromagnetic interference shielding effectiveness (35 dB) is achieved with an oriented filler loading of 30 wt %. Rotational orientation is an effective strategy for magnetic materials to achieve enhancements in both microwave absorption and shielding performance.
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