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

Research output: Contribution to journalArticle

125 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)497-507
Number of pages11
JournalChemical Engineering Journal
Volume285
DOIs
Publication statusPublished - Feb 1 2016
Externally publishedYes

Fingerprint

Carbon Nanotubes
Polypyrroles
Carbon nanotubes
Microwaves
Composite materials
permittivity
Permittivity
permeability
Epoxy Resins
dielectric property
Pyrroles
complementarity
magnetic property
Coprecipitation
Epoxy resins
Dielectric properties
polypyrrole
carbon nanotube
microwave
Fillers

Keywords

  • Carbon nanotube
  • Composite
  • FeO
  • Microwave absorption
  • Polypyrrole
  • Reflection loss

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Synthesis and characterization of Fe3O4/polypyrrole/carbon nanotube composites with tunable microwave absorption properties : Role of carbon nanotube and polypyrrole content. / Yang, Ruey Bin; Reddy, P. Madhusudhana; Chang, Chi Jung; Chen, Po An; Chen, Jem Kun; Chang, Chung Chieh.

In: Chemical Engineering Journal, Vol. 285, 01.02.2016, p. 497-507.

Research output: Contribution to journalArticle

Yang, Ruey Bin ; Reddy, P. Madhusudhana ; Chang, Chi Jung ; Chen, Po An ; Chen, Jem Kun ; Chang, Chung Chieh. / Synthesis and characterization of Fe3O4/polypyrrole/carbon nanotube composites with tunable microwave absorption properties : Role of carbon nanotube and polypyrrole content. In: Chemical Engineering Journal. 2016 ; Vol. 285. pp. 497-507.
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