Electromagnetic interference shielding characteristics of fabric complexes coated with conductive polypyrrole and thermally evaporated Ag

Y. K. Hong, C. Y. Lee, C. K. Jeong, J. H. Sim, K. Kim, J. Joo, M. S. Kim, J. Y. Lee, S. H. Jeong, S. W. Byun

    Research output: Contribution to journalArticlepeer-review

    105 Citations (Scopus)

    Abstract

    Through the chemical coating of polypyrrole (PPy) doped with naphthalene sulfonic acid (NSA) on electrically insulating poly (ethylene terephthalate) (PET) woven fabric, PPy-NSA/PET complexes were synthesized. By using the electrochemical coating of PPy doped anthraquinone-2-sulfonic acid (AQSA) on PPy-NSA/PET complexes, PPy-AQSA/PPy-NSA/PET complexes were synthesized. The silver (Ag) was thermally vacuum evaporated on the surface of PPy-AQSA/PPy-NSA/PET complexes (Ag|PPy-AQSA/PPy-NSA/PET). Electromagnetic interference (EMI) shielding efficiency (SE) and dc conductivity (σdc) of fabric complexes were measured for EMI shielding characteristics and theoretical simulation. The measurement of EMI SE in the frequency range from 50 MHz to 1.5 GHz was performed by using ASTM D4935-99 method. The EMI shielding characteristics such as transmittance, reflectance and absorbance were obtained from the S (scattering)-parameter analysis. We control the contribution of the absorbance or the reflectance to total EMI SE through the coating of conductive PPy and the evaporation Ag.

    Original languageEnglish
    Pages (from-to)439-442
    Number of pages4
    JournalCurrent Applied Physics
    Volume1
    Issue number6
    DOIs
    Publication statusPublished - 2001 Dec

    Bibliographical note

    Funding Information:
    This work was supported in part by Dual (Commercial and Military) Use Technology Program of the Ministry of Commerce, Industry and Energy, Korea (1999).

    Keywords

    • 07.50.Hp
    • 42.25.Bs
    • 82.35.Cd
    • Absorption
    • EMI(electromagnetic interference)
    • Fabric
    • Polypyrrole
    • Shielding

    ASJC Scopus subject areas

    • General Materials Science
    • General Physics and Astronomy

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