Electromagnetic interference shielding characteristics of fabric complexes coated with conductive polypyrrole and thermally evaporated Ag |
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| Authors: | 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 |
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| Institution: | a Department of Physics and Centre for Electro and Photoresponsive Molecules, Korea University, Sungbuk-Gu, Anam-Dong, Seoul 136-701, Republic of Korea;b Department of Textile Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea;c Department of Textile Engineering, Hanyang University, Seoul 133-791, Republic of Korea;d Korea Institute of Industrial Technology, Chonan 330-825, Republic of Korea |
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| 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. |
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| Keywords: | EMI(electromagnetic interference) Shielding Absorption Polypyrrole Fabric |
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