Electromagnetic Shielding Effectiveness of Nylon-66 Nanofiber Interleaved Carbon Epoxy Composites

Male, Umashankar; Renukappa, N. M.; Shivakumar, Kunigal; Rajan, J. Sundara

doi:10.1109/temc.2018.2845671

Cited by 23 publications

(6 citation statements)

References 31 publications

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“…A homogeneous solution of nylon-66 was prepared for the fabrication of nylon-66 nanofiber mat. 13 An electrospinning apparatus was used to prepare the nylon-66 nanofiber mat. By exposing the polymer solution to high voltage electrical field between two electrodes, the electrostatic force helps to form nanofibers from the evaporated charged solution, which is collected on a rotating drum collector.…”

Section: Electrospinning Of Nylon-66mentioning

confidence: 99%

“…Composites were examined for external damage and subjected to c‐scan to ensure there are no internal damages. Fabrication and the curing schedule were followed as per the literature 11,13 …”

Section: Materials Preparationmentioning

confidence: 99%

“…Electrospinning of nylon‐66 was carried out using 40 g nylon‐66 solution prepared by dissolving nylon‐66 crystals 4.8 g in a mixture of formic acid (24.96 g) and chloroform (10.24 g), in the weight ratio percentage of 75:25. A homogeneous solution of nylon‐66 was prepared for the fabrication of nylon‐66 nanofiber mat 13 . An electrospinning apparatus was used to prepare the nylon‐66 nanofiber mat.…”

Section: Materials Preparationmentioning

confidence: 99%

“…Although nylon interleaved carbonepoxy composites have been used in many structural applications, their use in electrical applications such as capacitive sensitivity and response to humidity changes is very scanty except for a recent study reporting EMI shielding efficiency. 13 Several polymer composites have been tried for monitoring relative humidity (RH) or moisture content because composite structures are clearly sensitive to changes in RH/moisture. Here also, we find few studies on the RH sensitivity as a function of capacitance.…”

Section: Introductionmentioning

confidence: 99%

“…The electro‐spun interleaving of the reinforced epoxy showed improved mechanical properties, fracture toughness. Although nylon interleaved carbon–epoxy composites have been used in many structural applications, their use in electrical applications such as capacitive sensitivity and response to humidity changes is very scanty except for a recent study reporting EMI shielding efficiency 13 …”

Section: Introductionmentioning

confidence: 99%

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Gamma radiation impact on dielectrics and RH sensitivity of nylon–carbon–GNP–epoxy composites

Shivamurthy,

Boranna,

Chikkakuntappa

et al. 2024

Polymer Engineering & Sci

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Composites of carbon–graphene nanoplatelets (GNP) epoxy with nylon‐66 interleaving were fabricated and investigated to understand the impact of γ‐irradiation on their dielectrics and relative humidity (RH) sensitivity by capacitance and water absorption measurements. The moisture sensitivity was investigated by measuring memory effect (hysteresis) and response time of the capacitance. Composites were γ‐irradiated at doses of 1000 and 3000 kGy and studied by the same set of measurements. X‐ray diffraction analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy were used to understand the impact of γ‐irradiation on the morphology and surface roughness of the composites. Results of these measurements suggest that 3000‐kGy dose γ‐irradiation produces good chain scission and cross‐linking, resulting in reduced water absorption and a 360% increase in capacitance values. The sensitivity of capacitance for 3000‐kGy γ‐irradiated composite was found to be highest at 40 pF/%RH, and hysteresis was 1.8% RH and not observed in non‐irradiated composites. Based on these observations, it seems that 3000‐kGy γ‐irradiated composite could be a potential candidate for moisture content diagnostics during condition monitoring of the carbon–epoxy structures in several industrial applications and needs to be further investigated.Highlights Composites of carbon–GNP epoxy with nylon‐66 interleaving were γ‐irradiated. 3000‐kGy dose γ‐irradiated composites exhibit 360% increase in capacitance. Sensitivity and hysteresis were higher than those of 1000‐kGy and non‐irradiated samples. Good chain scission and cross‐linking resulted in reduced water absorption.

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Section: Electrospinning Of Nylon-66mentioning

confidence: 99%

Section: Materials Preparationmentioning

confidence: 99%

Section: Materials Preparationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gamma radiation impact on dielectrics and RH sensitivity of nylon–carbon–GNP–epoxy composites

Shivamurthy,

Boranna,

Chikkakuntappa

et al. 2024

Polymer Engineering & Sci

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Development and Characterization of Ethylene‐Vinyl Acetate‐Graphene Nanocomposites

Bilugali Mahadevaswamy,

Balasubramanya

2024

Macromolecular Symposia

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The prospective applications of carbon graphene nanoplatelets (GNPs) reinforced ethylene vinyl acetate (EVA) nanocomposites in flexible electronics, energy storage devices, and thermal management systems have attracted a lot of attention. These nanocomposites offer an effective solution for enhancing the electrical conductivity of interfacing materials in electronic systems and addressing issues related to thermal management. GNPs that possess excellent thermal conductivity of 2000–4000 W m−1 K−1 and an electrical conductivity of 107 S m−1 are utilized in this investigation. The homogeneous dispersion of nanofiller and the effective load transfer between components through strong filler/polymer interfacial interactions are essential for the creation of multifunctional polymer nanocomposites. Particularly, their electrical conductivity and dielectric properties are highlighted in this study, with an emphasis on the synthesis and characterization of nanocomposite materials. This work investigates the utilization of graphene nanocomposites in EVA using a melt‐mixing technique assisted by sonication to fabricate multifunctional composites. Incorporating different weight percentages of GNPs (ranging from 0.1 to 0.4 wt.%) within the polymer matrix is carried out. In the present study, the nanocomposites are characterized by scanning electron microscopy investigation and impedance spectrum analysis. The distinctive characteristics of the AC electrical transport in nanocomposites are investigated between 10 Hz and 1 MHz. Excellent interfacial compatibility has been demonstrated by the homogenous distribution of GNPs within the matrix, confirmed by SEM examination. These EVA nanocomposites demonstrate improved electrical conductivity, thereby rendering them very useful for energy storage applications, such as electronic capacitors, wherein supports with a significant dielectric constant and minimal dielectric loss are required.

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Development of lightweight carbon nanotube-based epoxy nanocomposite shield for broadband electromagnetic interference shielding: estimating shielding effectiveness and experimental validation

Mohan

Sunitha

Sindhu

2021

J Mater Sci: Mater Electron

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Electromagnetic Shielding Effectiveness of Nylon-66 Nanofiber Interleaved Carbon Epoxy Composites

Cited by 23 publications

References 31 publications

Gamma radiation impact on dielectrics and RH sensitivity of nylon–carbon–GNP–epoxy composites

Gamma radiation impact on dielectrics and RH sensitivity of nylon–carbon–GNP–epoxy composites

Development and Characterization of Ethylene‐Vinyl Acetate‐Graphene Nanocomposites

Development of lightweight carbon nanotube-based epoxy nanocomposite shield for broadband electromagnetic interference shielding: estimating shielding effectiveness and experimental validation

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