Magnetic and dielectric properties of nickel-ferrite-embedded natural rubber composites

Menon, Sankar S.; Krishna, Rao S.; Wilson, Lida; Sambhudevan, Sreedha; Shankar, Balakrishnan; Mayeen, Anshida; Kalarikkal, Nandakumar

doi:10.1007/s00289-018-2323-0

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…5. Change of tensile strength and elongation at break of investigated NBR composites a large elongation at break values [13,14]. The variation of the loss factor tan δ and permittivity ε' versus frequency f at several temperatures for Cu-Al-Zn alloy are presented in Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

Electrical and Mechanical behaviors of rubber composites based on polar elastomers with incorporated Cu-based alloy

Mahmoud¹,

Nassar

Moustafa

et al. 2022

Preprint

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Dielectric elastomers (DE) containing conducting inorganic fillers would have great potential for actuators, capacitive energy storage, elastomer sensors and many other applications. In this regard, ternary composites with metal alloy materials as reinforcing fillers might be an enabler for low dielectric loss and high dielectric constant. Herein, ternary rubber composites were prepared by incorporation of Cu-based alloy into acrylonitrile-butadiene rubbers (NBR). However, material incompatibility between the Cu-Al-Zn alloy and the rubber matrix often results in phase separation, void formation and particle aggregation, with dramatically degraded performance. Through surface modification, Cu-Al-Zn alloy particles were uniformly dispersed onto the NBR rubber matrix via 3-(Trimethoxysilyl) propyl methacrylate (TMSPM) as coupling agent. The effective reinforcement of modified Cu-based alloy particles into NBR was systematically analyzed by SEM (scanning electron microscope) and XRD (X-ray diffraction). The results reveal that the morphology and dispersion state of modified Cu-Al-Zn alloy were critical to the dielectric properties of the NBR compounds. Mechanical properties were greatly enhanced by the reinforcement of modified Cu-based alloy into the NBR matrix. The outstanding performance of NBR composites is due to the uniform dispersion of modified Cu-Al-Zn alloy particles and good interfacial compatibility with rubber matrix, suggesting high performance dielectric composite.

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Section: Mechanical Propertiesmentioning

confidence: 97%

Electrical and Mechanical behaviors of rubber composites based on polar elastomers with incorporated Cu-based alloy

Mahmoud¹,

Nassar

Moustafa

et al. 2022

Preprint

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“…It is further noted that the imaginary part of permeability is higher than the real part in all frequency ranges. This difference is the cause of hysteresis losses due to residual magnetism [29]. Thus, the addition of cobalt nanowire improves the magnetic nature of composite to a significant level and improves the hysteresis losses, which in turn suppressing the incoming microwaves not to penetrate in the rubber composite.…”

Section: Characterisationmentioning

confidence: 99%

Mechanically toughened EMI shielding natural rubber composite in microwave frequency bands

Jeevakumari¹,

Mothilal²,

Ramesh³

et al. 2021

Plastics, Rubber and Composites

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Mechanically toughened high electromagnetic interference (EMI) shielding natural rubber composite material was prepared and characterised. The aim of this investigation was to reveal the role of adding cobalt nanowire and conductive graphene nanoplatelet in toughening and EMI shielding effectiveness of rubber composite in microwave bands (E, F, I and J). The composites were prepared using two roll-mill and cured at 150 ο C. The mechanical and EMI shielding behaviour was measured following ASTM standards. The addition of graphene nanoplatelet improved the toughness and skin effect of rubber, whereas cobalt nanowire improved the magnetic permeability. A highest EMI shielding of −17.6 dB in absorption and −20 dB in reflection at 18 GHz was observed for the composite made of graphene nanoplatelet and cobalt nanowire of 3 and 8phr. These mechanically toughened promising EMI shielding composite materials could be used as EMI filters and electromagnetic wave absorbers in antennae application with good toughness.

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“…No complete study was addressing the manufacturing and testing of such composites up to now, even if some papers addressed the properties of, e.g., natural rubber composites with other types of nickel ferrites [50], and so the innovative concept presented in the paper may bring clear benefits for the users. The characterization of these composite materials consisted of the determination of the hydrostatic density, SEM analyses, TG DSC analyses, and finally, dedicated tests to demonstrate the functionality of such materials as electromagnetic shields with proven flexibility, namely by the determination of the magnetic permeability, the dielectric characteristics, as well as the determination of the efficiency of electromagnetic shielding and lifetime.…”

Section: Introductionmentioning

confidence: 99%

Flexible Electromagnetic Shielding Nano-Composites Based on Silicon and NiFe2O4 Powders

Caramitu¹,

Ciobanu

Ion³

et al. 2023

Polymers

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In this paper, the obtaining and characterization of five experimental models of novel polymer composite materials with ferrite nano-powder are presented. The composites were obtained by mechanically mixing two components and pressing the obtained mixture on a hot plate press. The ferrite powders were obtained by an innovative economic co-precipitation route. The characterization of these composites consisted of physical and thermal properties: hydrostatic density, scanning electron microscopy (SEM), and TG DSC thermal analyses, along with functional electromagnetic tests in order to demonstrate the functionality of these materials as electromagnetic shields (magnetic permeability, dielectric characteristics, and shielding effectiveness). The purpose of this work was to obtain a flexible composite material, applicable to any type of architecture for the electrical and automotive industry, necessary for protection against electromagnetic interference. The results demonstrated the efficiency of such materials at lower frequencies, but also in the microwave domain, with higher thermal stability and lifetime.

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Magnetic and dielectric properties of nickel-ferrite-embedded natural rubber composites

Cited by 12 publications

References 33 publications

Electrical and Mechanical behaviors of rubber composites based on polar elastomers with incorporated Cu-based alloy

Electrical and Mechanical behaviors of rubber composites based on polar elastomers with incorporated Cu-based alloy

Mechanically toughened EMI shielding natural rubber composite in microwave frequency bands

Flexible Electromagnetic Shielding Nano-Composites Based on Silicon and NiFe2O4 Powders

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