Complex Permittivity of Polyaniline/Carbon Nanotube and Nanofibre Nanocomposites in the X-Band: PMMA Composites

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Authors
  1. Makeiff, D.
  2. Huber, T.
  3. Saville, P.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
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 these 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 were better microwave absorbers than composites containing only PAni or MWNTs.

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Keywords
Polyaniline;Permittivity;Carbon Nanotube;Carbon Nanofibre;Nanocomposite;Multiwalled nanotubes;X−band;polymethylmethacrylate;PMMA
Report Number
DRDC-ATLANTIC-TM-2004-124 — Technical Memorandum
Date of publication
16 May 2005
Number of Pages
58
DSTKIM No
CA026026
CANDIS No
523783
Format(s):
Electronic Document(PDF)

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