Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping

J. Joo; C. Y. Lee; H. G. Song; J. W. Kim; K. S. Jang; E. J. Oh; A. J. Epstein

doi:10.1080/10587259808044529

Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping

J. Joo, C. Y. Lee, H. G. Song, J. W. Kim, K. S. Jang, E. J. Oh, A. J. Epstein

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

14 Citations (Scopus)

Abstract

Electromagnetic interference (EMI) shielding efficiency (SE) of undoped and doped polyanilines and their mixtures with silver (Ag), graphite, and carbon black powder are measured in the frequency range from 10 MHz to 1 GHz by using ASTM (D 4935-89) technique. The measured SEs of the systems are from 20 dB to 50 dB, which agrees with theoretical values obtained from a good-conductor approximation. The SE of the system increases with increasing dc conductivity. This implies that the SE can be controlled by the intrinsic properties such as conductivity and dielectric constant. For the mixture of emeraldine base (EB) form of polyaniline and Ag powder doped with hydrochloric acid (ES/Ag), the SE is ∼46 dB with 70 um thickness, indicating the capability of commercial applications to EMI shielding. Chemical doping in polyaniline mixture samples induces the increase of the SE. The model accounting for the increase of the SE in the mixture system is discussed.

Original language	English
Pages (from-to)	367-370
Number of pages	4
Journal	Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume	316
DOIs	https://doi.org/10.1080/10587259808044529
Publication status	Published - 1998
Event	Proceedings of the 1998 IEEE Instrumentation and Measurement Technology Conference, IMTC. Part 1 (of 2) - St.Paul, MN, USA Duration: 1998 May 18 → 1998 May 21

Keywords

Conductivity
Electromagnetic interference shielding
Polyaniline

ASJC Scopus subject areas

Condensed Matter Physics

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10.1080/10587259808044529

Cite this

Joo, J., Lee, C. Y., Song, H. G., Kim, J. W., Jang, K. S., Oh, E. J., & Epstein, A. J. (1998). Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping. Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, 316, 367-370. https://doi.org/10.1080/10587259808044529

Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping. / Joo, J.; Lee, C. Y.; Song, H. G. et al.
In: Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals, Vol. 316, 1998, p. 367-370.

Research output: Contribution to journal › Conference article › peer-review

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abstract = "Electromagnetic interference (EMI) shielding efficiency (SE) of undoped and doped polyanilines and their mixtures with silver (Ag), graphite, and carbon black powder are measured in the frequency range from 10 MHz to 1 GHz by using ASTM (D 4935-89) technique. The measured SEs of the systems are from 20 dB to 50 dB, which agrees with theoretical values obtained from a good-conductor approximation. The SE of the system increases with increasing dc conductivity. This implies that the SE can be controlled by the intrinsic properties such as conductivity and dielectric constant. For the mixture of emeraldine base (EB) form of polyaniline and Ag powder doped with hydrochloric acid (ES/Ag), the SE is ∼46 dB with 70 um thickness, indicating the capability of commercial applications to EMI shielding. Chemical doping in polyaniline mixture samples induces the increase of the SE. The model accounting for the increase of the SE in the mixture system is discussed.",

keywords = "Conductivity, Electromagnetic interference shielding, Polyaniline",

author = "J. Joo and Lee, {C. Y.} and Song, {H. G.} and Kim, {J. W.} and Jang, {K. S.} and Oh, {E. J.} and Epstein, {A. J.}",

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T1 - Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping

AU - Joo, J.

AU - Lee, C. Y.

AU - Song, H. G.

AU - Kim, J. W.

AU - Jang, K. S.

AU - Oh, E. J.

AU - Epstein, A. J.

PY - 1998

Y1 - 1998

N2 - Electromagnetic interference (EMI) shielding efficiency (SE) of undoped and doped polyanilines and their mixtures with silver (Ag), graphite, and carbon black powder are measured in the frequency range from 10 MHz to 1 GHz by using ASTM (D 4935-89) technique. The measured SEs of the systems are from 20 dB to 50 dB, which agrees with theoretical values obtained from a good-conductor approximation. The SE of the system increases with increasing dc conductivity. This implies that the SE can be controlled by the intrinsic properties such as conductivity and dielectric constant. For the mixture of emeraldine base (EB) form of polyaniline and Ag powder doped with hydrochloric acid (ES/Ag), the SE is ∼46 dB with 70 um thickness, indicating the capability of commercial applications to EMI shielding. Chemical doping in polyaniline mixture samples induces the increase of the SE. The model accounting for the increase of the SE in the mixture system is discussed.

AB - Electromagnetic interference (EMI) shielding efficiency (SE) of undoped and doped polyanilines and their mixtures with silver (Ag), graphite, and carbon black powder are measured in the frequency range from 10 MHz to 1 GHz by using ASTM (D 4935-89) technique. The measured SEs of the systems are from 20 dB to 50 dB, which agrees with theoretical values obtained from a good-conductor approximation. The SE of the system increases with increasing dc conductivity. This implies that the SE can be controlled by the intrinsic properties such as conductivity and dielectric constant. For the mixture of emeraldine base (EB) form of polyaniline and Ag powder doped with hydrochloric acid (ES/Ag), the SE is ∼46 dB with 70 um thickness, indicating the capability of commercial applications to EMI shielding. Chemical doping in polyaniline mixture samples induces the increase of the SE. The model accounting for the increase of the SE in the mixture system is discussed.

KW - Conductivity

KW - Electromagnetic interference shielding

KW - Polyaniline

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JO - Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals

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Y2 - 18 May 1998 through 21 May 1998

ER -

Enhancement of electromagnetic interference shielding efficiency of polyaniline through mixture and chemical doping

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