Microwave Shielding Behaviour of Surface Treated MWCNT-epoxy Composites in I &amp; J Band-A Note

Vincent, Arunprakash; Ramesh, G.; Kumar, S. Madhan

doi:10.1016/j.colcom.2018.04.007

Cited by 41 publications

(16 citation statements)

References 11 publications

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“…The temperature was raised to 80°C and socked for 2 h in the mould itself. Thus particulate natural rubber composite was prepared [15,16].…”

Section: Composite Preparationmentioning

confidence: 99%

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Prabhahar¹,

R³

2020

Mater. Res. Express

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This current work aims to prepare a flexible elastomeric microwave shielding composite material with good mechanical and thermal properties by dispersing Fe 3 O 4 and titania hybrid nano-particles. The primary aim of this research work is to prepare a high strength and high thermal stable flexible natural rubber composite with higher wave attenuation coefficient against 'X (8-12 GHz)' and 'Ku (12-18 GHz)' band microwave frequencies. The Fe 3 O 4 -Titania hybrids were prepared using low energy ball milling and the hybridization effect was confirmed using transmission electron spectroscopy. The prepared Fe 3 O 4 -Titania hybrids were surface-treated using 3-Aminopropyltriethoxysilane via wet solution method to avoid agglomeration. The natural rubber flexible composite was made by two-roll milling with recommended process parameters. The mechanical and thermal results showed improved tensile strength, modulus and mass decomposition. The highest tensile strength of 60 MPa was observed for composite contains 1.0 vol% of Fe 3 O 4 -TiO 2 particles. Similarly, the highest thermal stability of 385°C is observed for composite contain Fe 3 O 4 -TiO 2 particles. The X and Ku band microwave attenuation behaviour revealed the highest attenuation of 28.1 dB for 1.0 vol% of Fe 3 O 4 -TiO 2 particle dispersed rubber composite in Ku band frequency. These mechanically toughened thermally stable and high microwave attenuation flexible composites could be used as EMI shielding material at antennae and other telecommunication devices where electromagnetic wave interference creates crucial issues.

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“…The temperature was raised to 80°C and socked for 2 h in the mould itself. Thus particulate natural rubber composite was prepared [15,16].…”

Section: Composite Preparationmentioning

confidence: 99%

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Prabhahar¹,

R³

2020

Mater. Res. Express

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“…Due to the incremental of the conductive and magnetic particle content, the nanoparticle could be easily generates a conductive network in the epoxy polymer matrix. [ 25,26 ]…”

Section: Resultsmentioning

confidence: 99%

“…Due to the incremental of the conductive and magnetic particle content, the nanoparticle could be easily generates a conductive network in the epoxy polymer matrix. [25,26] Figure 4 shows the absorption loss A of our conductive composites in the three tested fields (electric field, magnetic field, electromagnetic field). From the result, A is increased with the magnetic permeability and the frequency due their represent iron (III) oxide particle addition.…”

Section: Emi Shielding Effectivenessmentioning

confidence: 99%

Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

et al. 2020

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The hybrid polymer composite (HPMC) are increasingly used in the most shielding applications in the far field region, but the main problem is these HPMC should be having a good shielding efficiency and works at high temperature. The purpose of this research study was to prepare a high stable microwave shielding hybrid polymer composite for incremental temperature implementations with surface modified MWCNTs and Fe2O3 filled contents. In this paper, the kenaf fiber, Iron (III) oxide and MWCNTs particles were surface‐treated by APTMS for effective dispersion and adhesion on epoxy matrix medium. The morphology of the obtained shields was investigated by scanning electron microscopy. Thus, additions of MWCNTs and Iron (III) oxide particles increase the magnetic permeability and electrical permittivity of epoxy polymer matrix at high temperature (25°C‐100°C‐200°C). The kenaf fibers increase the mechanical properties such as the flexural, tensile. The principal advantages of these compositions are its low cost and its higher electrical conductivity which make it a suitable material as shielding material against electromagnetic field at high temperature. For electromagnetic compatibility in the far‐field regions, the adequate SE in the frequency range of 2 to 18 GHz of the epoxy polymer matrix‐kenaf fiber conducting composites was obtained by adding the MWCNT and Fe2O3 particles.

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“…All electronic tools that distribute or transmit electrical energy create electromagnetic waves, which have harmful impacts on human health, surrounding environment, and device performance [1]. The electromagnetic wave created by them gradually interfere with each other, as well are called the electromagnetic interference (EMI) [2][3][4][5][6][7][8]. In fact, the composite material that designed for the electromagnetic compatibility (EMC) applications contain conductive fibres (High electrical conductivity σ>>0) embedded in a dielectric medium (electrical conductivity σ=0) [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…The authors also stated that when adding magnetic particles also further improves the attenuation behavior to the greater extend. Vincent et al [6] studied the effect adding MWCNTs into epoxy composites in EMI shielding behavior. They concluded that addition of more volume of MWCNTs improved the attenuation behavior by improving conductivity.…”

Section: Introductionmentioning

confidence: 99%

Impact of Temperature Variation on the Electromagnetic Shielding Behavior of Multilayer Shield for EMC Applications

Merizgui¹,

Hadjadj²,

Kious³

et al. 2019

RCMA

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This paper attempts to disclose how temperature variation affects the electromagnetic shielding of a multilayer composite made of copper (Cu) fibers surrounded by silicon (Si). The model of the composite was fabricated by physical vapor deposition method, and tested with the temperature rising from room temperature (RT), 50º C, 85º C to 110º C. Under these temperatures, several electromagnetic shielding parameters of the composite were measured in various operating microwave frequencies (E, F, I and J bands). Among them, dielectric permittivity was acquired by LCR tester, magnetic permeability was measured by vibrating sample magnetometer (VSM), and the electromagnetic (EM) wave attenuation was recorded by typical microwave test bench. The results show that the composite had an EMI shielding of 20dB at 85º and 100dB at the RT; the reflection loss of the composite (volume fraction: 0.32) was also 100dB at the RT. Thus, the temperature rise suppresses the reflection loss; the composite has better electromagnetic shielding effect at the RT than at elevated temperatures; the volume faction enhances the wave attenuation of the composite. The results provide a good reference for the design of stable electromagnetic shielding materials at elevated temperatures.

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Microwave Shielding Behaviour of Surface Treated MWCNT-epoxy Composites in I & J Band-A Note

Cited by 41 publications

References 11 publications

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

Impact of Temperature Variation on the Electromagnetic Shielding Behavior of Multilayer Shield for EMC Applications

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Microwave Shielding Behaviour of Surface Treated MWCNT-epoxy Composites in I & J Band-A Note

Cited by 41 publications

References 11 publications

Role of Magnetite (Fe3O4)-Titania (TiO2) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe3O4)-Titania (TiO2) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Electromagnetic shielding effectiveness improvement with high temperature in far‐field behavior multiwall carbon nanotube/iron (III) particles addition in composites

Impact of Temperature Variation on the Electromagnetic Shielding Behavior of Multilayer Shield for EMC Applications

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Product

Resources

About

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies

Role of Magnetite (Fe₃O₄)-Titania (TiO₂) hybrid particle on mechanical, thermal and microwave attenuation behaviour of flexible natural rubber composite in X and Ku band frequencies