Fe3O4@SiO2 nanoparticles wrapped with polypyrrole (PPy) aerogel: A highly performance material as excellent electromagnetic absorber

作者：Sun, Xiaodong; Lv, Xuliang; Li, Xiaopeng; Yuan, Xin; Li, Ling^*; Gu, Guangxin^*

来源：Materials Letters, 2018, 221: 93-96.

DOI：10.1016/j.matlet.2018.03.079

• Conducting polymer
• Nanoparticles
• Electromagnetic absorption
• Microstructure

Massive efforts have been focused on effective electromagnetic absorbing materials, which have promising applications in suppressing or eliminating the electromagnetic radiation. In this study, Fe3O4@SiO2@PPy composites were prepared via a facile one-pot polyreaction. The results demonstrate that the composites loaded with 30 wt% possess an excellent electromagnetic absorbing property. Specifically, the minimum reflection loss value is -56.90 dB at 10.41 GHz at an absorber thickness of 3.7 mm. The broadest effective frequency bandwidth (reflection loss less than -10 dB) is 6.38 GHz at an absorber thickness of 3 mm. The outstanding performance implies that the Fe3O4@SiO2@PPy composites have a huge potential for application as advanced electromagnetic absorber with the advantages of strong absorption, wide bandwidth and low density.

• 单位
  复旦大学; 中国人民解放军国防科学技术大学