The purpose of this study was to evaluate the electromagnetic (EM) properties of hybrid materials made from polypyrrole (PPy) and barium hexaferrite (HF) for possible use in electromagnetic interference (EMI) shielding applications. X-ray diffraction and Fourier-transform infrared spectroscopy methods were used to confirm the presence of PPy and HF phases inside the hybrid structure. A scanning electron microscope analysis revealed that the HF particles were evenly dispersed throughout the PPy structure. The composites’ dielectric and magnetic attributes were evaluated across a spectrum of frequencies, with the highest values observed in the PPy specimen. Adding HF to the PPy matrix altered the dielectric and magnetic properties of the composite, with the percentage of HF in the composite influencing its dominance over these properties. It was determined that a 25% HF content produced the most stable and efficient composite for absorbing EM waves in the X-band. This study demonstrates the potential of conductive polymer composites for EMI shielding applications, with advantages, such as improved EMI shielding, lightweight, flexibility, corrosion resistance, and tailored properties. The novelty lies in optimizing the composition of the PPy/HF composite and the characterization of its EM properties, providing insights into the design of more efficient EMI shielding materials.

本研究的目的是评估由聚吡咯 (PPy) 和六铁酸钡 (HF) 制成的混合材料的电磁 (EM) 特性，以用于电磁干扰 (EMI) 屏蔽应用。X 射线衍射和傅里叶变换红外光谱法用于确认杂化结构内部是否存在 PPy 和 HF 相。扫描电子显微镜分析表明，HF 颗粒均匀分散在整个 PPy 结构中。复合材料的介电和磁性属性在整个频率范围内进行了评估，在 PPy 样品中观察到的值最高。将 HF 添加到 PPy 基质中会改变复合材料的介电和磁性，复合材料中 HF 的百分比会影响其对这些性能的主导作用。确定 25% 的 HF 含量产生最稳定和最有效的复合材料，用于吸收 X 波段的 EM 波。本研究展示了导电聚合物复合材料在 EMI 屏蔽应用中的潜力，具有改进的 EMI 屏蔽、轻量化、柔韧性、耐腐蚀性和定制性能等优势。新颖之处在于优化了 PPy/HF 复合材料的成分及其 ​​EM 特性的表征，为更高效的 EMI 屏蔽材料的设计提供了见解。耐腐蚀性和定制性能。新颖之处在于优化了 PPy/HF 复合材料的成分及其 ​​EM 特性的表征，为更高效的 EMI 屏蔽材料的设计提供了见解。耐腐蚀性和定制性能。新颖之处在于优化了 PPy/HF 复合材料的成分及其 ​​EM 特性的表征，为更高效的 EMI 屏蔽材料的设计提供了见解。