Hollow core-shell structured Fe3O4@Polypyrrole composites for enhanced electromagnetic wave absorption

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Composites Science and Technology Pub Date : 2024-10-16 DOI:10.1016/j.compscitech.2024.110917

Jiang Guo , Yukun Sun , Xu Li , Shaohua Xi , Mohamed M. Ibrahim , Hua Qiu , Gaber A.M. Mersal , Zeinhom M. El-Bahy , Vignesh Murugadoss , Waras Abdul , Fujian Zhou , Juanna Ren , Zhanhu Guo , Jianfeng Zhu

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Abstract

Due to the rapid development of electronic devices, the electromagnetic pollution has become increasingly serious. Developing electromagnetic wave absorption (EWA) materials with lightweight, strong absorption capacity and wide effective absorption bandwidth (EAB) becomes a research hotspot. In this work, the hollow-Fe₃O₄@polypyrrole (HFO@PPy) composites with core-shell structure were successfully synthesized by in situ polymerization method. The electromagnetic parameters could be adjusted by controlling the content of HFO in HFO@PPy. In addition, HFO@PPy composites show both dielectric and magnetic losses. The synergistic effect of both two losses contributes to an enhanced electromagnetic attenuation. The enhanced impedance matching is achieved by the composition (HFO and PPy) and designed unique structure (core-shell and hollow structure). The maximum reflection loss (RL) and EAB are −52.01 dB and 2.72 GHz at 3.1 mm for 60.0 wt% HFO@PPy composites. Therefore, by reasonably regulating the component content and optimizing the structural design, the EWA performance of HFO@PPy composites could be effectively improved, providing a significant inspiration for fabrication of microwave absorbers.

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用于增强电磁波吸收的空心核壳结构 Fe3O4@Polypyrrole 复合材料

随着电子设备的快速发展，电磁污染日益严重。开发重量轻、吸收能力强、有效吸收带宽宽的电磁波吸收（EWA）材料成为研究热点。本研究采用原位聚合法成功合成了具有核壳结构的空心Fe3O4@聚吡咯（HFO@PPY）复合材料。通过控制 HFO@PPy 中 HFO 的含量可以调节电磁参数。此外，HFO@PPy 复合材料同时具有介电损耗和磁损耗。这两种损耗的协同效应增强了电磁衰减。增强的阻抗匹配是通过成分（HFO 和 PPy）和设计的独特结构（核壳和空心结构）实现的。60.0 wt% HFO@PPy 复合材料在 3.1 mm 时的最大反射损耗 (RL) 和 EAB 分别为 -52.01 dB 和 2.72 GHz。因此，通过合理调节成分含量和优化结构设计，可有效提高 HFO@PPy 复合材料的 EWA 性能，为微波吸收器的制造提供了重要启示。

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.