MWNT/PEG grafted nanocomposites and an analysis of their EMI shielding properties

Jang, Chun Keun; Park, Ji Hyun; Jaung, Jae Yun

doi:10.1016/j.materresbull.2012.04.131

Cited by 6 publications

(4 citation statements)

References 28 publications

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“…In order to investigate the relative contribution of reflection and absorption in the total EMI SE of the composites, the SE A and SE R were calculated for various prepared composites directly from S-parameters by using Eq. (4) and (5). Fig.…”

Section: Emi Shielding Propertiesmentioning

confidence: 94%

“…Electromagnetic interference (EMI) consists of undesirable and uncontrolled radiated signals emitted by electronic instruments [1,2] which can interfere with the normal operation of other electronic devices [3][4][5]. Therefore, an appropriate EMI shield is necessary to protect workspaces and the environment from electromagnetic waves, specifically in the X-band frequency (8.2− 12.4 GHz) [4] used by many critical applications such as weather radar, air traffic control, satellite communications, and television broadcasting [6].…”

Section: Introductionmentioning

confidence: 99%

“…Recent work has focused on improving the dispersion state of the filler in efforts to improve the electrical conductivity and thus the SE [5,19,20,24,28]. Several of these works have studied the effect of modifying the interface between the polymer and filler to improve filler-matrix compatibility [15,29,30].…”

Section: Introductionmentioning

confidence: 99%

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Correlation between mechanical dissipation and improved X-band electromagnetic shielding capabilities of amine functionalized graphene/thermoplastic polyurethane composites

Esfahani

Katbab

Taeb

et al. 2017

European Polymer Journal

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Graphene-based polymer nanocomposites have demonstrated significant promise to create commercially viable electromagnetic interference (EMI) shielding to protect the next-generation of electronic materials from radiative pollution. In the present study, we carry out a systematic analysis of the dynamic mechanical, dielectric, electrical and X-band shielding properties of thermoplastic polyurethane (TPU) elastomer filled with amine functionalized graphene obtained by the rapid thermal expansion of graphite oxide. By preparation of nanocomposites based on modified and unmodified graphene using solution mixing and hot compression moulding, we demonstrate that the modification with 2-aminoethyl methacrylate enhances the EMI shielding from 14 to 25 dB. We also show by fracture analysis, crosssectional transmission electron microscopy and dynamic mechanical analysis that the modification significantly strengthens the interfacial interactions between TPU and the functionalized graphene at the same filler loading. We find that the dominant shielding mechanism is through absorption and discuss the correlation between the viscoelastic mechanical loss tangent and the more effective dissipation of absorbed EM radiation which might account for the discrepancy between the theoretically predicted and experimentally observed EMI SE.

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Section: Emi Shielding Propertiesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation between mechanical dissipation and improved X-band electromagnetic shielding capabilities of amine functionalized graphene/thermoplastic polyurethane composites

Esfahani

Katbab

Taeb

et al. 2017

European Polymer Journal

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show abstract

“…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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Advanced Nanostructured Materials in Electromagnetic Interference Shielding

Srivastava

Mittal²

2017

Hybrid Nanomaterials

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MWNT/PEG grafted nanocomposites and an analysis of their EMI shielding properties

Cited by 6 publications

References 28 publications

Correlation between mechanical dissipation and improved X-band electromagnetic shielding capabilities of amine functionalized graphene/thermoplastic polyurethane composites

Correlation between mechanical dissipation and improved X-band electromagnetic shielding capabilities of amine functionalized graphene/thermoplastic polyurethane composites

Preparation and electromagnetic properties of zinc ferrite/expanded graphite composites

Advanced Nanostructured Materials in Electromagnetic Interference Shielding

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