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采用原位掺杂聚合法,将聚苯胺(PANI)对粒径在60～80nm的M型钡铁氧体颗粒(BaFe12O19)进行了包覆,得到了具有棒状结构的复合材料.通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)等测试手段对材料的形貌和结构进行了表征.结果表明,PANI链段与BaFe12O19颗粒之间存在作用力.使用振动磁强计和四探针法测定了复合材料的磁性能与电性能后发现,饱和磁化强度与矫顽力均随聚苯胺含量的增加呈规律性下降趋势,而电导率呈上升趋势.复合材料的吸收特性测试结果表明,该材料反射率小于-20dB时,带宽可以达到15.07GHz.同时详细地讨论了纳米复合材料的聚合机理及相互作用.
Polyaniline (PANI) was coated on M-type barium ferrite particles (BaFe12O19) with particle size of 60 ~ 80nm by in-situ doping polymerization method to obtain a composite material with rod-like structure.According to X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to characterize the morphology and structure of the material. The results showed that the PANI segment and BaFe12O19 particles The existence of force between the use of vibrating magnetometer and four probe method to determine the magnetic properties and electrical properties of composite materials found that the saturation magnetization and coercivity with polyaniline content decreased with a regular trend of decline, The conductivity of the composites shows an upward trend.The experimental results of the absorption properties of the composites show that the reflectivity of the composites can reach 15.07GHz when the reflectivity is less than -20dB.The polymerization mechanism and interaction of nanocomposites are discussed in detail.