Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application

Yoon Jin Kim; Kyung Jin An; Kwang S. Suh; Hyung Do Choi; Jong Hwa Kwon; Yeon Choon Chung; Woo Nyon Kim; Ae Kyung Lee; Jae Ick Choi; Ho Gyu Yoon

doi:10.1109/TEMC.2005.858759

Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application

Yoon Jin Kim, Kyung Jin An, Kwang S. Suh, Hyung Do Choi, Jong Hwa Kwon, Yeon Choon Chung, Woo Nyon Kim, Ae Kyung Lee, Jae Ick Choi, Ho Gyu Yoon

Research output: Contribution to journal › Article › peer-review

30 Citations (Scopus)

Abstract

Multiwalled carbon nanotubes (MWNTs) are chemically modified with respect to various different oxidative conditions, including the acid concentration, treatment time, and temperature. The conductivity of polyurethane (PU) composites filled with the MWNTs oxidized under optimal condition is measured as a function of frequency with the content of MWNTs and analyzed using percolation theory. Because the PU composites filled only with the MWNTs cannot satisfy the requirements for materials providing shielding against electromagnetic waves, conductive polymer composites are fabricated by the hybridization of MWNTs with Ag flakes. It is observed that a small amount of the MWNTs remarkably enhances the conductivity and shielding effectiveness of the MWNT/Ag flake/PU composites, by bridging the gap between the flaky Ag clusters. The electromagnetic interference shielding effectiveness of the composites can be controlled from about 60 dB to more than 80 dB at an extremely low loading level of both the MWNTs and the Ag flakes in the frequency range from 10 to 1000 MHz.

Original language	English
Pages (from-to)	872-879
Number of pages	8
Journal	IEEE Transactions on Electromagnetic Compatibility
Volume	47
Issue number	4
DOIs	https://doi.org/10.1109/TEMC.2005.858759
Publication status	Published - 2005 Nov

Keywords

Carbon nanotubes (CNTs)
Electrical properties
Electromagnetic interference (EMI) shielding effectiveness
Hybridization
Oxidation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TEMC.2005.858759

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Kim, Y. J., An, K. J., Suh, K. S., Choi, H. D., Kwon, J. H., Chung, Y. C., Kim, W. N., Lee, A. K., Choi, J. I., & Yoon, H. G. (2005). Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application. IEEE Transactions on Electromagnetic Compatibility, 47(4), 872-879. https://doi.org/10.1109/TEMC.2005.858759

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title = "Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application",

abstract = "Multiwalled carbon nanotubes (MWNTs) are chemically modified with respect to various different oxidative conditions, including the acid concentration, treatment time, and temperature. The conductivity of polyurethane (PU) composites filled with the MWNTs oxidized under optimal condition is measured as a function of frequency with the content of MWNTs and analyzed using percolation theory. Because the PU composites filled only with the MWNTs cannot satisfy the requirements for materials providing shielding against electromagnetic waves, conductive polymer composites are fabricated by the hybridization of MWNTs with Ag flakes. It is observed that a small amount of the MWNTs remarkably enhances the conductivity and shielding effectiveness of the MWNT/Ag flake/PU composites, by bridging the gap between the flaky Ag clusters. The electromagnetic interference shielding effectiveness of the composites can be controlled from about 60 dB to more than 80 dB at an extremely low loading level of both the MWNTs and the Ag flakes in the frequency range from 10 to 1000 MHz.",

keywords = "Carbon nanotubes (CNTs), Electrical properties, Electromagnetic interference (EMI) shielding effectiveness, Hybridization, Oxidation",

author = "Kim, {Yoon Jin} and An, {Kyung Jin} and Suh, {Kwang S.} and Choi, {Hyung Do} and Kwon, {Jong Hwa} and Chung, {Yeon Choon} and Kim, {Woo Nyon} and Lee, {Ae Kyung} and Choi, {Jae Ick} and Yoon, {Ho Gyu}",

year = "2005",

month = nov,

doi = "10.1109/TEMC.2005.858759",

language = "English",

volume = "47",

pages = "872--879",

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T1 - Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application

AU - Kim, Yoon Jin

AU - An, Kyung Jin

AU - Suh, Kwang S.

AU - Choi, Hyung Do

AU - Kwon, Jong Hwa

AU - Chung, Yeon Choon

AU - Kim, Woo Nyon

AU - Lee, Ae Kyung

AU - Choi, Jae Ick

AU - Yoon, Ho Gyu

PY - 2005/11

Y1 - 2005/11

N2 - Multiwalled carbon nanotubes (MWNTs) are chemically modified with respect to various different oxidative conditions, including the acid concentration, treatment time, and temperature. The conductivity of polyurethane (PU) composites filled with the MWNTs oxidized under optimal condition is measured as a function of frequency with the content of MWNTs and analyzed using percolation theory. Because the PU composites filled only with the MWNTs cannot satisfy the requirements for materials providing shielding against electromagnetic waves, conductive polymer composites are fabricated by the hybridization of MWNTs with Ag flakes. It is observed that a small amount of the MWNTs remarkably enhances the conductivity and shielding effectiveness of the MWNT/Ag flake/PU composites, by bridging the gap between the flaky Ag clusters. The electromagnetic interference shielding effectiveness of the composites can be controlled from about 60 dB to more than 80 dB at an extremely low loading level of both the MWNTs and the Ag flakes in the frequency range from 10 to 1000 MHz.

AB - Multiwalled carbon nanotubes (MWNTs) are chemically modified with respect to various different oxidative conditions, including the acid concentration, treatment time, and temperature. The conductivity of polyurethane (PU) composites filled with the MWNTs oxidized under optimal condition is measured as a function of frequency with the content of MWNTs and analyzed using percolation theory. Because the PU composites filled only with the MWNTs cannot satisfy the requirements for materials providing shielding against electromagnetic waves, conductive polymer composites are fabricated by the hybridization of MWNTs with Ag flakes. It is observed that a small amount of the MWNTs remarkably enhances the conductivity and shielding effectiveness of the MWNT/Ag flake/PU composites, by bridging the gap between the flaky Ag clusters. The electromagnetic interference shielding effectiveness of the composites can be controlled from about 60 dB to more than 80 dB at an extremely low loading level of both the MWNTs and the Ag flakes in the frequency range from 10 to 1000 MHz.

KW - Carbon nanotubes (CNTs)

KW - Electrical properties

KW - Electromagnetic interference (EMI) shielding effectiveness

KW - Hybridization

KW - Oxidation

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Hybridization of oxidized MWNT and silver powder in polyurethane matrix for electromagnetic interference shielding application

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Keywords

ASJC Scopus subject areas

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