Electromagnetic interference shielding effectiveness of carbon nanofiber/LCP composites

Yang, Shuying; Lozano, Karen; Lomeli, Azalia; Foltz, Heinrich; Jones, Robert E.

doi:10.1016/j.compositesa.2004.07.009

Cited by 322 publications

(177 citation statements)

References 30 publications

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“…However, this dependence is sophisticated [9,10,11]. The investigation of shielding textiles may also include: measurement of the permittivity, the permeability, and the conductivity of the components; study of the structure and internal relations between fibers; and designing materials with desired shielding properties.…”

Section: Introductionmentioning

confidence: 99%

Measurements of Shielding Effectiveness of Textile Materials Containing Metal by the Free-Space Transmission Technique with Data Processing in the Time Domain

Dvurechenskaya¹,

Bajurko²,

Zieliński³

et al. 2013

Metrology and Measurement Systems

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The results of shielding effectiveness (SE) measurements of textile materials containing metal by the free-space transmission technique (FSTT) in the 1-26.5 GHz frequency range are presented in the paper. It is shown that experimental data processing using time-domain gating (TDG) makes it possible to effectively remove diffracted and reflected components from the desired signal. The comparison with the results obtained by other techniques, namely modified FSTT with TDG and coaxial line probe technique (ASTM D4935-99) is given. The comparison shows that the proposed technique gives more reasonable results while the measurement set-up is simpler in realization.

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Section: Introductionmentioning

confidence: 99%

Measurements of Shielding Effectiveness of Textile Materials Containing Metal by the Free-Space Transmission Technique with Data Processing in the Time Domain

Dvurechenskaya¹,

Bajurko²,

Zieliński³

et al. 2013

Metrology and Measurement Systems

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“…9 Most studies on CNF based nanocomposites have addressed on improving electrical and mechanical properties. [1][2][3][4][5][6][7][11][12][13][14] However, it is important to study the effect of temperature and nano-reinforcement on the crystalline structural changes of polymer matrix to process nanocomposites into products.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7] This characteristic is required to be used as housing materials of electric devices to protect them from electromagnetic interference (EMI) and electrostatic discharge (ESD) phenomena. 6,7 Compared to conventional carbon fiber or carbon black, a less amount of CNFs is needed for composites due to their nano-scale size and high aspect ratio (length over diameter). Furthermore, CNFs have been thermally modified to enhance electrical properties of composites due to an increase of an intrinsic electrical conductivity of CNFs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites

Lee¹,

Hahn²,

Ku³

et al. 2011

Bulletin of the Korean Chemical Society

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Effect of heat treatment of carbon nanofibers (CNF) on electrical properties and crystallization behavior of polypropylene was reported. Two types of CNFs (untreated and heat treated at 2300 °C) were incorporated into polypropylene (PP) using intensive mixing. A significant drop in volume resistivity was observed with composites containing untreated 5 wt % and heat treated 3 wt % CNF. In non-isothermal crystallization studies, both untreated and heat treated CNFs acted as nucleating agents. Composites with heat treated CNFs showed a higher crystallization temperature than composites with untreated CNFs did. TEM results of CNF revealed that an irregular structure of CNFs can be converted into the continuous graphitic structure after heat treatment. Furthermore, STM showed that the higher carbonization temperature leads to the higher graphite degree which presents the larger carbon network size, suggesting that a more graphitic structure of CNFs led to a higher crystallization temperature of PP.

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“…EMI shielding effectiveness (SE) is expressed in decibel (dB). A shielding effectiveness of 30 dB, corresponding to 99.9% attenuation of the EMI radiation, is considered an adequate level of shielding for many applications [15].…”

Section: Electromagnetic Interference Shieldingmentioning

confidence: 99%

Electrical Conductivity and Electromagnetic Shielding Effectiveness of Silicone Rubber Filled With Ferrite and Graphite Powders

Morari¹,

Balan²,

Pintea³

et al. 2011

PIER M

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Abstract-There is increasing interest in electromagnetic interference (EMI) shielding due to the serious electromagnetic environment pollution caused by the continuously increased use of the electrical products and electronic devices. Electrical conductivity and EMI shielding effectiveness (SE) of composite materials made from silicone rubber with carbon powder and ferrite powder have been studied in microwaves and terahertz frequency ranges and the results are presented in this paper. In microwaves range, samples with higher electrical conductivity show a small variation of shielding performance with frequency, whereas the performance of samples with lower conductivity falls away with increasing frequency. It is shown that the variation of attenuation with frequency relates to the conductivity of the material.

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Electromagnetic interference shielding effectiveness of carbon nanofiber/LCP composites

Cited by 322 publications

References 30 publications

Measurements of Shielding Effectiveness of Textile Materials Containing Metal by the Free-Space Transmission Technique with Data Processing in the Time Domain

Measurements of Shielding Effectiveness of Textile Materials Containing Metal by the Free-Space Transmission Technique with Data Processing in the Time Domain

Effect of Carbon Nanofiber Structure on Crystallization Kinetics of Polypropylene/Carbon Nanofiber Composites

Electrical Conductivity and Electromagnetic Shielding Effectiveness of Silicone Rubber Filled With Ferrite and Graphite Powders

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