Carbon-Encapsulated Fe Nanoparticles Embedded in Organic Polypyrrole Polymer as a High Performance Microwave Absorber
Carbon-Encapsulated Fe Nanoparticles Embedded in Organic Polypyrrole Polymer as a High Performance Microwave Absorber
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DOI：
10.1021/acs.jpcc.6b09445
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发表时间：
2016-12-15
影响因子：
3.7
通讯作者：
Zhang, Zhidong
中科院分区：
文献类型：
--
作者：
Jiang, Linwen;Wang, Zhenhua;Zhang, Zhidong
本研究采用弧光放电与原位氧化聚合相结合的方法，制备了高效有机-无机复合材料Fe/C/PPy(聚吡咯包埋的Fe/C纳米胶囊)。结果表明，Fe/C/PPy-石蜡复合材料比Fe/C-石蜡和PPy-石蜡复合材料具有更高的介电损耗，这意味着这种嵌入结构提高了介电性能。对于给定的2.2 mm厚度，在11.2-16.9 GHz范围内获得了超过-10分贝的反射损耗，覆盖了Ku波段(12-18 GHz)的大部分。在厚度为2.5 mm的情况下，在9.6-14.1 GHz范围内获得了超过10d B的RL，覆盖了X波段的大部分(8-12 GHz)。物理模型的说明表明，具有丰富的非均质界面的特殊埋置结构使其具有优异的吸波性能。
In this study, highly effective organic-inorganic composites Fe/C/PPy (Fe/C nanocapsules embedded in polypyrrole) were prepared by combining the arc-discharge process and in situ oxidative polymerization method. It was found that Fe/C/PPy-paraffin composites have higher dielectric loss in comparison with both Fe/C-paraffin and PPy-paraffin composites, implying enhanced dielectric properties by this embedded structure. The RL (reflection loss) exceeding -10 dB is obtained in the 11.2-16.9 GHz for a given thickness of 2.2 mm, which covers most of the Ku-band (12-18 GHz). The RL exceeding 10 dB is obtained in the 9.6-14.1 GHz for a given thickness of 2.5 mm, which covers most of the X-band (8-12 GHz). The illustration of the physical model indicated that the special embedded structure with abundant heterogeneous interfaces is responsible for the excellent microwave-absorption performances.