Constructing sandwich-like polyaniline/graphene oxide composites with tunable conjugation length toward enhanced microwave absorption
Constructing sandwich-like polyaniline/graphene oxide composites with tunable conjugation length toward enhanced microwave absorption
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构建具有可调共轭长度以增强微波吸收的三明治状聚苯胺/氧化石墨烯复合材料
DOI：
10.1016/j.orgel.2018.09.017
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发表时间：
2018-12
影响因子：
3.2
通讯作者：
Xuefeng Zhang
中科院分区：
文献类型：
--
作者：
Jia Liu;Yuping Duan;Lulu Song;Xuefeng Zhang
为了提高聚苯胺（PANI）/氧化石墨烯（GO）复合材料的微波吸收性能，以过硫酸铵为氧化剂，在酸性条件下，采用一步插层聚合法制备了不同GO含量的聚苯胺/氧化石墨烯复合材料。采用长时间的机械搅拌，获得了理想的类棒状结构。采用扫描电子显微镜、透射电子显微镜、X射线衍射、拉曼光谱、傅里叶变换红外光谱、四探针电阻率测量系统和矢量网络分析对样品进行了表征。结果表明，成功地合成了PANI-GO-PANI三聚体类纳米结构。与原始PANI相比，电磁吸收性能增强。最大反射损耗（RL）值在6.8 GHz时达到-41.29 dB，厚度为5 mm。带宽（RL < −10 dB）在4.9至18 GHz范围内达到惊人的13.1 GHz。通过控制GO的含量，可以调节GO层上PANI纳米棒的平均共轭长度，从而获得可控的吸波性能和不同的频带。
Polyaniline (PANI)/graphene oxide (GO) sandwich-like composite was synthesized for achieving higher microwave absorption performance using a one-step intercalation polymerization of aniline under acidic condition in the presence of GO layers with ammonium persulfate as an oxidant at various GO contents. Long-time mechanical stirring was adopted to obtain perfect sandwich-like structure. The samples were characterized by Scanning electron microscopy, Transition electron microscopy, X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, 4-point probes resistivity measurements system and vector network analysis. The results revealed that the PANI-GO-PANI sandwich-like microstructures were successfully synthesized. The electromagnetic absorption properties were enhanced versus pristine PANI. The maximum reflection loss (RL) value reached −41.29 dB at 6.8 GHz with a thickness of 5 mm. The bandwidth (RL < −10 dB) attained an amazing 13.1 GHz from 4.9 to 18 GHz with suitable thickness. By controlling the content of GO, the average conjugation length of PANI nanorods on GO layers can be modulated, resulting in controllable wave-absorbing properties and various frequency bands.
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影响因子：
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作者：
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通讯作者：
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DOI：
10.1007/s10854-017-6664-5
发表时间：
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影响因子：
2.8
作者：
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影响因子：
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