Synthesis and characterization of Fe3O4/polypyrrole/carbon nanotube composites with tunable microwave absorption properties: Role of carbon nanotube and polypyrrole content

Ruey Bin Yang, P. Madhusudhana Reddy, Chi Jung Chang, Po An Chen, Jem Kun Chen, Chung Chieh Chang

研究成果: 雜誌貢獻文章同行評審

202 引文 斯高帕斯(Scopus)

摘要

Two different sizes of Fe3O4 nanoparticles were synthesized by hydrothermal (H-Fe3O4, ≈100nm) and co-precipitation (C-Fe3O4, ≈20nm) methods. Further, Fe3O4/polypyrrole (Ppy) composites were prepared by polymerizing the conductive monomer, pyrrole on the surface of Fe3O4. In addition, we also synthesized Fe3O4/Ppy/carbon nanotube (CNT) composites by blending the CNTs with Fe3O4/Ppy composites. Epoxy resin-based microwave absorbers were prepared at different thicknesses (1, 2 and 3mm) by mixing 20% by weight of the as-prepared composites and the complex permittivity (ε'-jε″) and permeability (μ'-jμ″) were measured in the 2-18GHz frequency range. The composites exhibited significant improvement in microwave absorption (reflection loss≤-10dB) with a bandwidth from 8 to 12.5GHz (X-band) by matching the magnetic properties of Fe3O4 and the dielectric properties of Ppy and CNTs for 20wt% of fillers in 3-mm thickness absorbers. The addition of CNTs into H-Fe3O4/Ppy composites further enhances the minimum reflection loss from -15.8 to -25.9dB. The present results can pave the way to construct microwave absorbers with a desired reflection loss at a target frequency and thus, the efficient complementarities between complex permittivity and permeability of the nanocomposites can be achieved.
原文英語
頁(從 - 到)497-507
頁數11
期刊Chemical Engineering Journal
285
DOIs
出版狀態已發佈 - 二月 1 2016
對外發佈

ASJC Scopus subject areas

  • 化學 (全部)
  • 環境化學
  • 化學工程 (全部)
  • 工業與製造工程

指紋

深入研究「Synthesis and characterization of Fe<sub>3</sub>O<sub>4</sub>/polypyrrole/carbon nanotube composites with tunable microwave absorption properties: Role of carbon nanotube and polypyrrole content」主題。共同形成了獨特的指紋。

引用此