Improving microwave absorption of the polyaniline by carbon nanotube and needle-like magnetic nanostructures

Sabet, Mohammad; Jahangiri, Hasan; Ghashghaei, Erfan

doi:10.1016/j.synthmet.2016.11.034

Cited by 34 publications

(9 citation statements)

References 35 publications

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“…The CF@NiFe 2 O 4 composite was facilely synthesized via a typical solvothermal reaction. 24 200 mg CF, 10 mmol FeCl 3 ·6H 2 O, 5 mmol NiCl 2 ·4H 2 O and 80 mmol ammonium acetate (NH 4 COOH) were homogeneously dispersed in 80 mL ethylene glycol phase by ultrasonication for 5 min and stirring for 25 min. Then, the liquid mixture was transferred into a 100 mL hydrothermal reactor and kept at 200 °C for 720 min.…”

Section: Methodsmentioning

confidence: 99%

“…Previous research results have shown that PANI can enhance the absorptive capacity of EM wave absorption composites through dielectric loss and eddy current loss among some other ways. [20][21][22][23][24] Besides, its structure has an important inuence on its EM wave-absorbing performance; special structural features such as its rod shape and spherical shape have received extensive attention. [25][26][27][28][29] As a typical magnetic material, NiFe 2 O 4 has been widely applied in the synthesis of efficient EM wave-absorbing composites.…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Feng

Jia

et al. 2019

RSC Adv.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Feng

Jia

et al. 2019

RSC Adv.

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“…Te incident EM radiation energy causes the induced EMR to decrease. Te characteristics that contribute to the shielding process are absorption, refection, and multiple refections [19]. Based on their shielding principles diferent kinds of shielding are present such as magnetic feld shielding, electric feld shielding, and EM feld shielding.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Kuekha

Mubarak

Azhdar

2022

Advances in Materials Science and Engineering

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The structural, magnetic, and dielectric properties of a series of Ni2+ substituted cobalt nanoferrite particle samples with the composition Co1−xNixFe2O4 (where x = 0.0 ≤ x ≤ 1.0) synthesized by using the sol-gel auto combustion route are presented in this report. The electromagnetic interference shielding of Co1−xNixFe2O4/PVA nanocomposite films has been determined in the microwave X-band (8.2–12.4 GHz) frequencies. X-ray analysis revealed the single-phase formation of nickel-substituted cobalt nanoferrite samples. The decreasing trend of lattice parameters with Ni2+ substitution indicates the incorporation of Ni2+ into the crystal structure, obeying Vegard’s law. FTIR showed the absorption bands at 560–590 cm−1 ( v 1 ) and 390–400 cm−1 ( v 2 ) were attributed to (A-site) tetrahedral and (B-site) octahedral groups complex, respectively which confirm the spinel structure of the samples. Field emission scanning electron microscopy showed agglomerated grains of different sizes and shapes in the morphological observation. EDS reveals the chemical composition of the prepared samples. TEM analysis revealed that the synthesized particles were nearly monodisperse, show to be roughly spherical in shape, and have a polycrystalline nature. The dielectric constant and loss tangent (tanδ) is found to decrease with increasing frequency which shows normal behavior for ferrimagnetic materials. The magnetic properties determined using VSM have substantially changed with the substitution of Ni2+ ions. The saturation magnetization and the experimentally magnetic moment are observed to decrease with an increase in Ni2+ content x. A series of Co1−xNixFe2O4/PVA nanocomposite films are prepared by applying simple, rapid, and inexpensive methods for EMI shielding materials. The vector network analyzer data were used to evaluate the electromagnetic interference (EMI) shielding properties of the Co1−xNixFe2O4/PVA samples. At 9.2 GHz, a study of reflection loss showed a minimum reflection loss (RL) of −32.08 dB. Also, the synthesized Co1−xNixFe2O4/PVA nanocomposite samples show improved performance for EMI efficiency which proves the utility of this doping. With this low RL value, the results and techniques also promise a simple, effective approach to achieve light-weight Co1−xNixFe2O4/PVA nanocomposite films and make it excellent microwave absorbers, capable of working at gigahertz frequencies for application potentials in EMI shielding material, communication, radar stealth technology, and electronic warfare.

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“…The energy of the incident EM radiation is reduced by the induced EMR. Three parameters contribute to the mechanism of shielding: absorption, reflection, and multiple reflections [ 11 ]. These three kinds of shielding are based on their shielding principles, such as magnetic field shielding, electric field shielding, and the EM field.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Nickel Spinel Ferrites Nanoparticles Coated with Thermally Reduced Graphene Oxide for EMI Shielding in the Microwave, UV, and NIR Regions

et al. 2021

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The co-precipitation and in situ modified Hummers’ method was used to synthesize Nickel Spinal Ferrites (NiFe) nanoparticles and NiFe coated with Thermally Reduced Graphene Oxide (TRGO) (NiFe-TRGO) nanoparticles, respectively. By using polyvinyl chloride (PVC), tetrahydrofuran (THF), and NiFe-TRGO, the nanocomposite film was synthesized using the solution casting technique with a thickness of 0.12–0.13 mm. Improved electromagnetic interference shielding efficiency was obtained in the 0.1–20 GHz frequency range. The initial assessment was done through XRD for the confirmation of the successful fabrication of nanoparticles and DC conductivity. The microstructure was analyzed with scanning electron microscopy. The EMI shielding was observed by incorporating a filler amount varying from 5 wt.% to 40 wt.% in three different frequency regions: microwave region (0.1 to 20 GHz), near-infrared (NIR) (700–2500 nm), and ultraviolet (UV) (200–400 nm). A maximum attenuation of 65 dB was observed with a 40% concentration of NiFe-TRGO in nanocomposite film.

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Improving microwave absorption of the polyaniline by carbon nanotube and needle-like magnetic nanostructures

Cited by 34 publications

References 35 publications

Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Synthesis of Nickel Spinel Ferrites Nanoparticles Coated with Thermally Reduced Graphene Oxide for EMI Shielding in the Microwave, UV, and NIR Regions

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Improving microwave absorption of the polyaniline by carbon nanotube and needle-like magnetic nanostructures

Cited by 34 publications

References 35 publications

Fabrication of NiFe2O4@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Fabrication of NiFe2O4@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Electromagnetic Interference Shielding and Characterization of Ni2+ Substituted Cobalt Nanoferrites Prepared by Sol-Gel Auto Combustion Method

Synthesis of Nickel Spinel Ferrites Nanoparticles Coated with Thermally Reduced Graphene Oxide for EMI Shielding in the Microwave, UV, and NIR Regions

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Product

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Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber

Fabrication of NiFe₂O₄@carbon fiber coated with phytic acid-doped polyaniline composite and its application as an electromagnetic wave absorber