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Electromagnetic interference shielding by using conductive polypyrrole and metal compound coated on fabrics
Author(s) -
Lee C. Y.,
Lee D. E.,
Jeong C. K.,
Hong Y. K.,
Shim J. H.,
Joo J.,
Kim M. S.,
Lee J. Y.,
Jeong S. H.,
Byun S. W.,
Zang D. S.,
Yang H. G.
Publication year - 2002
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.227
Subject(s) - materials science , polypyrrole , electromagnetic shielding , electromagnetic interference , conductive polymer , electrical conductor , composite material , coating , emi , conductivity , polymer , evaporation , electrical engineering , chemistry , physics , polymerization , thermodynamics , engineering
Electromagnetic interference (EMI) shielding materials of complex type of conductive polypyrrole (PPy) as an intrinsically conducting polymer and silver‐palladium (AgPd) metal compound coated on woven or non‐woven fabrics are synthesized. From dc conductivity and SEM photographs of PPy/fabric complexes, we discuss charge transport mechanism and the homogeneity of coating on the fabrics. The EMI shielding efficiency of PPy/fabric and AgPd/fabric complexes is in the range of 8 ∼ 80 dB depending on the conductivity and the additional Ag vacuum evaporation. The highest EMI shielding efficiency of PPy/fabric complexes vacuum‐evaporated by Ag is ∼80 dB, indicating potential materials for military uses. We propose that PPy/fabrics are excellent RF and microwave absorber because of the relatively high absorbance and low reflectance of the materials. Copyright © 2002 John Wiley & Sons, Ltd.