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.

合成苯胺（PANI）/氧化石墨（GO）的三明治状复合材料，以在酸性条件下，在GO层存在下，以过硫酸铵作为氧化剂，在GO含量不同的情况下，通过苯胺的一步插层聚合，实现更高的微波吸收性能。 。采用长时间的机械搅拌以获得理想的三明治状结构。通过扫描电子显微镜，跃迁电子显微镜，X射线衍射，拉曼光谱，傅里叶变换红外光谱，4点探针电阻率测量系统和矢量网络分析对样品进行表征。结果表明，已成功合成了PANI-GO-PANI三明治状微结构。与原始的PANI相比，电磁吸收性能得到了增强。厚度为5 mm时，最大反射损耗（RL）值在6.8 GHz时达到-41.29 dB。带宽（RL <−10 dB）在4.9至18 GHz范围内具有合适的厚度，达到了惊人的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，从而产生可控的吸波特性和各种频带。