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Title: Super-high-frequency shielding properties of excimer-laser-synthesized-single-wall-carbon-nanotubes/polyurethane nanocomposite films

Abstract

Electromagnetic shielding attenuation (ESA) properties of carbon nanotubes/polymer nanocomposite films, in the super high frequency (SHF) X-band (7-12 GHz) domain are studied. The nanocomposite films consisted of thermoset polyurethane (PU) resin blended with single-walled carbon nanotubes (SWCNTs) mats, and deposited on fused quartz substrates. Two different approaches were used to achieve the nanocomposite films, namely (i) through the on-substrate ''all-laser'' growth approach of SWCNTs directly onto substrate, followed by their infiltration by the PU resin, and (ii) by appropriately dispersing the chemically-purified SWCNTs (in the soot form) into the PU matrix and their subsequent deposition onto quartz substrates by means of a solvent casting process. Characterizations of the ESA properties of the developed nanocomposite films show that they exhibit systematically a deep shielding band, centered at around 9.5 GHz, with an attenuation as high as |- 30| dB, recorded for SWCNT loads of 2.5 wt. % and above. A direct correlation is established between the electrical conductivity of the nanocomposite films and their electromagnetic shielding capacity. The SWCNTs/PU nanocomposites developed here are highly promising shielding materials as SHF notch filters, as their ESA capacity largely exceeds the target value of |- 20| dB generally requested for commercial applications.

Authors:
; ; ;  [1]; ;  [2]
  1. Institut National de la Recherche Scientifique, INRS-Energie, Materiaux et Telecommunications, 1650 Blvd. Lionel Boulet, C.P. 1020, Varennes, Quebec, J3X 1S2 (Canada)
  2. Mechanical Engineering Department, Ecole Polytechnique de Montreal, P.O. Box 6079, Montreal, H3C 3A7 (Canada)
Publication Date:
OSTI Identifier:
21560184
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 109; Journal Issue: 8; Other Information: DOI: 10.1063/1.3574443; (c) 2011 American Institute of Physics; Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABLATION; ATTENUATION; CAPACITY; CARBON; COMPOSITE MATERIALS; CORRELATIONS; DEPOSITION; ELECTRIC CONDUCTIVITY; EXCIMER LASERS; FILMS; NANOTUBES; POLYURETHANES; QUARTZ; SHIELDING; SHIELDING MATERIALS; SOLVENTS; SUBSTRATES; ELECTRICAL PROPERTIES; ELEMENTS; GAS LASERS; LASERS; MATERIALS; MINERALS; NANOSTRUCTURES; NONMETALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXIDE MINERALS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHYSICAL PROPERTIES; PLASTICS; POLYAMIDES; POLYMERS; SYNTHETIC MATERIALS

Citation Formats

Aiessa, B, Habib, M A, Denidni, T A, El Khakani, M A, Laberge, L L, and Therriault, D. Super-high-frequency shielding properties of excimer-laser-synthesized-single-wall-carbon-nanotubes/polyurethane nanocomposite films. United States: N. p., 2011. Web. doi:10.1063/1.3574443.
Aiessa, B, Habib, M A, Denidni, T A, El Khakani, M A, Laberge, L L, & Therriault, D. Super-high-frequency shielding properties of excimer-laser-synthesized-single-wall-carbon-nanotubes/polyurethane nanocomposite films. United States. doi:10.1063/1.3574443.
Aiessa, B, Habib, M A, Denidni, T A, El Khakani, M A, Laberge, L L, and Therriault, D. Fri . "Super-high-frequency shielding properties of excimer-laser-synthesized-single-wall-carbon-nanotubes/polyurethane nanocomposite films". United States. doi:10.1063/1.3574443.
@article{osti_21560184,
title = {Super-high-frequency shielding properties of excimer-laser-synthesized-single-wall-carbon-nanotubes/polyurethane nanocomposite films},
author = {Aiessa, B and Habib, M A and Denidni, T A and El Khakani, M A and Laberge, L L and Therriault, D},
abstractNote = {Electromagnetic shielding attenuation (ESA) properties of carbon nanotubes/polymer nanocomposite films, in the super high frequency (SHF) X-band (7-12 GHz) domain are studied. The nanocomposite films consisted of thermoset polyurethane (PU) resin blended with single-walled carbon nanotubes (SWCNTs) mats, and deposited on fused quartz substrates. Two different approaches were used to achieve the nanocomposite films, namely (i) through the on-substrate ''all-laser'' growth approach of SWCNTs directly onto substrate, followed by their infiltration by the PU resin, and (ii) by appropriately dispersing the chemically-purified SWCNTs (in the soot form) into the PU matrix and their subsequent deposition onto quartz substrates by means of a solvent casting process. Characterizations of the ESA properties of the developed nanocomposite films show that they exhibit systematically a deep shielding band, centered at around 9.5 GHz, with an attenuation as high as |- 30| dB, recorded for SWCNT loads of 2.5 wt. % and above. A direct correlation is established between the electrical conductivity of the nanocomposite films and their electromagnetic shielding capacity. The SWCNTs/PU nanocomposites developed here are highly promising shielding materials as SHF notch filters, as their ESA capacity largely exceeds the target value of |- 20| dB generally requested for commercial applications.},
doi = {10.1063/1.3574443},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 8,
volume = 109,
place = {United States},
year = {2011},
month = {4}
}