Mechanical, dielectric and EMI shielding response of styrene acrylonitrile, styrene acrylonitrile/polyaniline polymer blends, upon incorporation of few layer graphene at low filler loadings

Saboor, Abdul; Khan, Ahmad Nawaz; Jan, Rahim; Sharif, Saqib; Khan, Muhammad Bilal

doi:10.1007/s10965-018-1648-6

Cited by 22 publications

(8 citation statements)

References 47 publications

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“…Abdul et al developed styrene acrylonitrile polymer composites using PANI and few layers graphene (FLG), where an enhancement in AC conductivity from 5.38 × 10 −7 to 3.67 × 10 −5 S/cm was observed at 5 MHz for a filler loading of 10 wt % PANI and 1 wt% FLG. [ 47 ] In comparison with the AC conductivity of composites with individual fillers, it can be seen that E/TG9 exhibited a value of 3.13 × 10 −6 S/m similar to that of E/P@G. However, the conductivity of E/P9 was slightly lower.…”

Section: Resultsmentioning

confidence: 96%

Polyaniline nanorod adsorbed on reduced graphene oxide nanosheet for enhanced dielectric, viscoelastic and thermal properties of epoxy nanocomposites

Kunju

Gopalakrishnan

2021

Polymer Engineering & Sci

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In this work, polyaniline nanorod adsorbed on reduced graphene oxide (P@G) hybrid filler was prepared via in situ polymerization of aniline monomer in the presence of reduced graphene oxide as template. Fourier transform infrared, X‐ray diffraction, field emission scanning electron microscopy, and high‐resolution transmission electron microscopy images revealed the formation of P@G hybrid. The P@G hybrid was dispersed in dichlorobenzene and then introduced into epoxy resin at different loadings. The epoxy nanocomposites containing 9 wt% P@G hybrids (E/P@G9) exhibited a maximum DC conductivity of 1.34 × 10−5 S/cm that is eight orders higher compared to pure epoxy. At 103 Hz, a dielectric constant (ε′) of 163 was attained for E/P@G9, nearly 34 times higher than pure epoxy. A percolation threshold of 4 vol% was observed for ε′. Dynamic mechanical studies showed that significant enhancement in storage modulus values were exhibited for 3 and 5 wt% of hybrids. The glass transition temperature showed a maximum shift of 10°C to higher temperatures at 3 wt% loading of P@G hybrids (E/P@G3). The tensile strength, Young's modulus, and impact strength of the E/P@G3 nanocomposites enhanced by 19.7, 72, and 12%, respectively. The thermal stability of the epoxy nanocomposites also enhanced with the addition of P@G hybrid.

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Section: Resultsmentioning

confidence: 96%

Polyaniline nanorod adsorbed on reduced graphene oxide nanosheet for enhanced dielectric, viscoelastic and thermal properties of epoxy nanocomposites

Kunju

Gopalakrishnan

2021

Polymer Engineering & Sci

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“…As the composite film prepared was very thin, multiple reflections were negligible. Capacitance and dissipation factor were measured by Vector Network Analyzer in the microwave region (0.1 GHz to 20 GHz), and SER and SEA were calculated by the following formulas:

where “l” is the thickness of film, ε ′ is dielectric constant, A is the area of film, λ wavelength, C is capacitance, ε o is the dielectric permittivity of free space, and tanδ is the dissipation factor [ 34 ].…”

Section: Resultsmentioning

confidence: 99%

“…where "l" is the thickness of film, ε is dielectric constant, A is the area of film, λ wavelength, C is capacitance, ε o is the dielectric permittivity of free space, and tanδ is the dissipation factor [34]. Figure 8 shows the relation between shielding effectiveness due to reflection SER and frequency calculated by the above-mentioned equations.…”

Section: Emi Shielding In the Microwave Region Calculated Through Impedance Parametersmentioning

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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“…To overcome the limitations of PANI processability, a number of methods have been studied, and blending and compositing are the two most commonly used techniques [12][13][14][15]. In 1990, after the discovery of the solution processability of PANI, research on PANI composites or blends with insulating polymers gained popularity [16,17]. Over the years, many studies have been performed to find the substitute of conventional inorganic conductive fillers, such as metal particles and conducting carbon black, with conducting PANI fillers [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

A review of advances in the preparation and application of polyaniline based thermoset blends and composites

2020

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For several decades, forming blend and composite of polyaniline (PANI) with insulating polymers has been a widely studied research area because of the potential applications of such blends, which have a unique combination of mechanical properties, the processability of conventional polymers and the electrical property of conducting polymers. The current review paper will emphasize PANI composites or blends with thermosetting polymer matrices. The enhanced electro-mechanical properties of the blends and composites depend on the uniform dispersion of the PANI particle in polymer matrix. Therefore, considerable studies have focused on improving the distribution of PANI particles within the thermoset matrices. In this review paper, all the parameters and conditions that influence the surface morphology and application of PANI thermoset blends and composites will be described systematically. Recent progress on PANI based thermoset system with multifunctional ternary composites research will be highlighted in this paper. Furthermore, encouraging applications of different PANI thermoset composites and blends are discussed, such as flame-retardant materials, lightning damage suppression, metal ion removal, anticorrosive coating, electromagnetic shielding, conductive adhesives, and sensing materials.

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Mechanical, dielectric and EMI shielding response of styrene acrylonitrile, styrene acrylonitrile/polyaniline polymer blends, upon incorporation of few layer graphene at low filler loadings

Cited by 22 publications

References 47 publications

Polyaniline nanorod adsorbed on reduced graphene oxide nanosheet for enhanced dielectric, viscoelastic and thermal properties of epoxy nanocomposites

Polyaniline nanorod adsorbed on reduced graphene oxide nanosheet for enhanced dielectric, viscoelastic and thermal properties of epoxy nanocomposites

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

A review of advances in the preparation and application of polyaniline based thermoset blends and composites

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