Abstract Sheet aluminum powder was used as the substrate and aniline as the polymer monomer, to design novel Al/PANI composites via in-situ polymerization, which exhibited high electromagnetic wave absorption properties and low infrared emissivity. These unique bifunctional composite were systematically characterized by X-ray powder diffraction, Fourier transform infrared spectroscopy, scanning electron microscope, IR-2 dual-band emission rate measuring instrument and vector network analyzer. The calculated results showed that the maximum reflection loss value of Al/PANI composite reached −46.09 dB at 14.56 GHz with a film thickness of only 1.0 mm. Meanwhile, the infrared emission rate of the composite was 0.55. The excellent electromagnetic absorption performance may be ascribed to its superior conductivity and unique structure. The merits of as-synthesized composites with high-performance microwave absorbing properties and low infrared emissivity indicate the potential use of Al/PANI composites in the applicable stealth fields.

中文翻译：

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导电聚苯胺涂覆在铝基板上作为具有高性能微波吸收和低红外发射率的双功能材料

摘要 以片状铝粉为基材，苯胺为聚合物单体，通过原位聚合设计了具有高电磁波吸收性能和低红外发射率的新型Al/PANI复合材料。这些独特的双功能复合材料通过 X 射线粉末衍射、傅里叶变换红外光谱、扫描电子显微镜、IR-2 双波段发射率测量仪和矢量网络分析仪进行了系统表征。计算结果表明，Al/PANI 复合材料的最大反射损耗值在 14.56 GHz 时达到 -46.09 dB，薄膜厚度仅为 1.0 mm。同时，复合材料的红外发射率为0.55。优异的电磁吸收性能可能归功于其优越的导电性和独特的结构。