EMI shielding effectiveness of carbon based nanostructured polymeric materials: A comparative study

Al‐Saleh, Mohammed H.; Saadeh, Walaa; Sundararaj, Uttandaraman

doi:10.1016/j.carbon.2013.04.008

Cited by 810 publications

(538 citation statements)

References 39 publications

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“…The specific EMI shielding efficiency (i.e., attenuation per unit density) of GNPs/B 4 C composites with 5 vol% GNPs was calculated to be around 15 dB cm 3 /g which is higher than that of typical metals (e.g., ∼10 dB cm 3 /g for solid copper). 35 The increase of SE R could be mainly attributed to the enhanced electrical conductivity due to the formation of three-dimensional conductive network of GNPs. GNPs provide a high EMI SE enhancement efficiency and the 2-D nature of GNPs was thought to play a more important role in EMI shielding.…”

Section: -4mentioning

confidence: 99%

Lightweight graphene nanoplatelet/boron carbide composite with high EMI shielding effectiveness

et al. 2016

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Lightweight graphene nanoplatelet (GNP)/boron carbide (B4C) composites were prepared and the effect of GNPs loading on the electromagnetic interference (EMI) shielding effectiveness (SE) has been evaluated in the X-band frequency range. Results have shown that the EMI SE of GNP/B4C composite increases with increasing the GNPs loading. An EMI SE as high as 37 ∼ 39 dB has been achieved in composite with 5 vol% GNPs. The high EMI SE is mainly attributed to the high electrical conductivity, high dielectric loss as well as multiple reflections by aligned GNPs inside the composite. The GNP/B4C composite is demonstrated to be promising candidate of high-temperature microwave EMI shielding material.

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Section: -4mentioning

confidence: 99%

Lightweight graphene nanoplatelet/boron carbide composite with high EMI shielding effectiveness

et al. 2016

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“…Using fibrous materials is additionally profitable from the construction point of view. CNFs have been receiving increasing attention because of their high length-to-diameter ratio and their potential applications in composite materials [8], filters [9], gas sensors [10], anode materials for rechargeable batteries [11], supercapacitors [3], bottom-up assembly in nanoelectronics, and etc. Among the materials used in the preparation of CNFs, polyacrylonitrile (PAN) and its copolymers are recognized as the most promising precursors [5,6,10,12].…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Effects of pore structures on electrochemical behaviors of polyacrylonitrile-based activated carbon nanofibers by carbon dioxide activation

Lee¹,

Kim²,

An³

et al. 2014

Carbon letters

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Activated carbon nanofibers (ACNF) were prepared from polyacrylonitrile (PAN)-based nanofibers using CO 2 activation methods with varying activation process times. The surface and structural characteristics of the ACNF were observed by scanning electron microscopy and X-ray diffraction, respectively. N 2 adsorption isotherm characteristics at 77 K were confirmed by Brunauer-Emmett-Teller and Dubinin-Radushkevich equations. As experimental results, many holes or cavernous structures were found on the fiber surfaces after the CO 2 activation as confirmed by scanning electron microscopy analysis. Specific surface areas and pore volumes of the prepared ACNFs were enhanced within a range of 10 to 30 min of activation times. Performance of the porous PAN-based nanofibers as an electrode for electrical double layer capacitors was evaluated in terms of the activation conditions.

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“…Recently, electromagnetic interference (EMI) shielding materials have been extensively studied for their potential application both in civil and military fields [1][2][3][4][5]. Typically, metals have been used as EMI shielding materials as they have high conductivity and dielectric permittivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and electromagnetic properties of zinc ferrite/expanded graphite composites

Shen

Cao

2014

Materials Science-Poland

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An effective process for the synthesis of nano spinel zinc ferrite/expanded graphite composites was developed in order to get an electromagnetic interference shielding material. Firstly, expandable graphite was prepared using sulfuric and nitric acid solutions. Then, the precursor of the composites was produced by chemical co-precipitation method, followed by heating treatment. The obtained composites were characterized by X-ray diffraction and scanning electron microscopy. The dielectric and magnetic properties were determined using vector network analyzer and vibrating sample magnetometry. The results showed that ferrite nanoparticles with the sizes of about 50 -150 nm were uniformly dispersed on the surface and interspace of EG. The magnetic properties of the composites changed by adjusting the ferrite/EG ratio and the composites had high dielectric constant in the range of 2 -18 GHz. These properties of the prepared composites suggest that they can be used as a promising electromagnetic interference shielding material.

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EMI shielding effectiveness of carbon based nanostructured polymeric materials: A comparative study

Cited by 810 publications

References 39 publications

Lightweight graphene nanoplatelet/boron carbide composite with high EMI shielding effectiveness

Lightweight graphene nanoplatelet/boron carbide composite with high EMI shielding effectiveness

Effects of pore structures on electrochemical behaviors of polyacrylonitrile-based activated carbon nanofibers by carbon dioxide activation

Preparation and electromagnetic properties of zinc ferrite/expanded graphite composites

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