Mechanically toughened EMI shielding natural rubber composite in microwave frequency bands

Jeevakumari, S. A. Amutha; Mothilal, T.; Ramesh, G.; Prakash, Ved

doi:10.1080/14658011.2021.1890514

Cited by 26 publications

(5 citation statements)

References 34 publications

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“…It is observed that when frequency of microwave increases, wave attenuation percentage also increases for all composite designation. [ 19 ] The improvement in absorption shielding mechanism is the cause of improved conductivity of PVA composite due to the presence of Ni‐biocarbon particles. Since the biocarbon contains carbon atoms as continuous structure the eddy current development is high when the incoming microwaves hit the composite material.…”

Section: Resultsmentioning

confidence: 99%

Development of highly conductive hybrid Ni‐biocarbon‐based polyvinyl alcohol composites for microwave shielding properties

Rose¹,

Kuppusamy²,

Bapu³

et al. 2023

Vinyl Additive Technology

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In this study a highly flexible microwave shielding material was fabricated by solution casting method utilizing Nickel and biocarbon particles in PVA matrix and characterized for mechanical, magnetic, and microwave shielding properties. The main aim of this study was to prove the significant role of magnetic particles in electromagnetic interference (EMI) shielding along with conductive particles. The results show that the addition of Ni-biocarbon hybrid particle increases the shielding properties up to 56.5 dB at 20 GHz. The magnetic permeability increased gradually with the inclusion of Ni particles with a highest magnetization, coercivity, and retentivity of 1250 E À6 emu, À9000 G, and 1100 E À6 emu. Similarly the mechanical results show that adding biocarbon enhances the composite's mechanical properties. A highest tensile strength, tear strength, elongation, and hardness are noted as 38, 168 MPa, 18.4%, and 36 Shore-D. Comparatively, the hardness and elongation% of composite designations contains 3 and 5 vol% of hybrid particles have increased by 9% and 26%, respectively, in comparison to composite containing only 5 vol% of biocarbon with PVA. Scanning electron microscope fractography indicates biocarbon particles reduce voids and improve adhesion. These flexible EMI shielding composites could be used in telecommunication and other wave transmitting devices in engineering applications.

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Section: Resultsmentioning

confidence: 99%

Development of highly conductive hybrid Ni‐biocarbon‐based polyvinyl alcohol composites for microwave shielding properties

Rose¹,

Kuppusamy²,

Bapu³

et al. 2023

Vinyl Additive Technology

View full text Add to dashboard Cite

show abstract

“…8f), which represents an outstanding alternative for polymer-based composites (Fig. 8e) [2,6,[52][53][54][55][56][57][58][59].…”

Section: Electromagnetic Shielding Of the Biocompositesmentioning

confidence: 99%

Epiphyte-Inspired Multifunctional Biocomposites for Electromagnetic Interference Shielding

Hong

Rojas

et al. 2023

Preprint

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“…At cryogenic conditions, the polymer matrix shrinkage was responsible to enhance the interfacial strength. The main failure mode in unidirectional [90] s samples was the interfacial debonding of fiber/matrix. Matrix shrinkage at cryogenic conditions provides a denser and brittle structure and improves tensile properties.…”

Section: Mechanical Aspects Of Thermal Shocks and Thermal Cyclesmentioning

confidence: 99%

A review on critical aspects of thermal shocks and thermal cycles in fiber reinforced polymer composites

Jamshidi

Hejazi

Sheikhzadeh

et al. 2022

Journal of Reinforced Plastics and Composites

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Fiber reinforced polymer composites (FRPCs) have gained great progress in a wide range of applications from construction and building structures to automobile and vehicle systems. During the operational lifetime, some FRPCs are exposed to various environmental conditions such as thermal cycles and thermal shocks. Fluctuation of the ambient temperature in the forms of thermal shocks or thermal cycles is one of the most important factors that deteriorate the durability and performance of the FRPCs. Compared to ceramic composites, less attention has been paid to the effects of thermal shocks and thermal cycles on the physical/mechanical properties of FRPCs. A comprehensive insight for the future advancements in this field is essential to possibly reduce the failure risks of FRPCs under thermal shocks and thermal cycles. The present work provides a comprehensive review on the physical/mechanical behavior of FRPCs under thermal cycles and thermal shocks. This work also provides a broad review on several factors that determines mechanical behavior of FRPCs, such as polymeric matrix, fiber type, incorporated nanofillers and fiber/polymer interface. Recent studies denoting important aspects and possible problems in mechanical performance of FRPCs under thermal shocks are also summarized.

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Mechanically toughened EMI shielding natural rubber composite in microwave frequency bands

Cited by 26 publications

References 34 publications

Development of highly conductive hybrid Ni‐biocarbon‐based polyvinyl alcohol composites for microwave shielding properties

Development of highly conductive hybrid Ni‐biocarbon‐based polyvinyl alcohol composites for microwave shielding properties

Epiphyte-Inspired Multifunctional Biocomposites for Electromagnetic Interference Shielding

A review on critical aspects of thermal shocks and thermal cycles in fiber reinforced polymer composites

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