Complex Permittivity of Polyaniline-Carbon Nanotube and Nanofibre Composites in the X-band. PMMA Composites

Abstract

Polymer composites incorporating polyaniline (PAni) and multiwalled carbon nanotubes (MWNTs) as conductive filler were synthesized and characterized using FT-IR spectroscopy, SEM, TEM, and dc conductivity measurements. The pure nanocomposite powders were significantly more conductive than PAni, MWNT, or CNFs alone. PAni, MWNT, CNFs, PAni-coated MWNT (PAni-MWNT), and PAni-coated CNF (PAni-CNF) nanocomposites were also incorporated as conductive filler into the insulating matrix, PMMA, to produce a rigid and conductive composite material with well-defined shape. The microwave properties of theses composites were examined by determining the complex permittivity from transmission-reflection waveguide measurements in the X-band (8-12 GHz). PMMA composites containing PAni-MWNT or PAni-CNFs poorer, while PMMA composites containing PAni and MWNT mixed ex situ(i) were better microwave absorbers than composites containing only PAni or MWNTs.

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Document Details

Document Type
Technical Report
Publication Date
May 16, 2005
Accession Number
ADA437210

Entities

People

  • Darren A. Makeiff
  • Paul Saville
  • Trisha Huber

Organizations

  • Defence Research and Development Canada

Tags

DTIC Thesaurus Topics

  • Carbon Nanotubes
  • Composite Materials
  • Conductive Polymers
  • Dielectric Properties
  • Electromagnetic Radiation
  • Electron Microscopy
  • Frequency
  • Fullerenes
  • Graphitic Materials
  • Materials
  • Materials Processing
  • Mechanical Properties
  • Microwave Frequency
  • Nanocomposites
  • Polymer Matrix Composites
  • Semi-Flexible Rod Polymers
  • X Band

Fields of Study

  • Materials science

Readers

  • Microwave Engineering.
  • Nanocomposite Materials Science
  • Polymer Science and Technology

Technology Areas

  • Microelectronics