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Characterization of conducting polymer coated fabrics at microwave frequencies

Kaynak, Akif and Hakansson, Eva 2009, Characterization of conducting polymer coated fabrics at microwave frequencies, International journal of clothing science and technology, vol. 21, no. 2-3, pp. 117-126.

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Title Characterization of conducting polymer coated fabrics at microwave frequencies
Author(s) Kaynak, Akif
Hakansson, Eva
Journal name International journal of clothing science and technology
Volume number 21
Issue number 2-3
Start page 117
End page 126
Publisher Emerald Group Publishing
Place of publication Bingley, England
Publication date 2009
ISSN 0955-6222
1758-5953
Keyword(s) ageing (materials)
permittivity
electromagnetic fields
microwaves
Summary Purpose – The purpose of this paper is to investigate microwave reflection, transmission, and complex permittivity of p-toluene-2-sulfonic acid doped conducting polypyrrole coated nylon-lycra textiles in the 1-18?GHz frequency with a view to potential applications in the interaction of electromagnetic radiation with such coated fabrics.

Design/methodology/approach –
The chemical polymerization of pyrrole is achieved by an oxidant, ferric chloride and doped with p-toluene sulfonic acid (pTSA) to enhance the conductivity and improve stability. Permittivity of the conducting textile substrates is performed using a free space transmission method accompanied by a mathematical diffraction reduction method.

Findings – The real part of permittivity increases with polymerization time and dopant concentration, reaching a plateau at certain dopant concentration and polymerization time. The imaginary part of permittivity shows a frequency dependent change throughout the test range. All the samples have higher values of absorption than reflection. The total electromagnetic shielding effectiveness exceeds 80 percent for the highly pTSA doped samples coated for 3?h.

Originality/value – A non-contact, non-destructive free space method thin flexible specimens to be tested with high accuracy across large frequency range. The non-destructive nature of the experiments enables investigation of the stability of the microwave transmission, reflection, absorption and complex permittivity values. Moreover, mathematical removal of the diffraction enables higher accuracy.
Notes Reproduced with the kind permission of the copyright owner.
Language eng
Field of Research 091299 Materials Engineering not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
HERDC collection year 2009
Copyright notice ©2009, Emerald Group Publishing
Persistent URL http://hdl.handle.net/10536/DRO/DU:30016709

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.