Dielectric Spectroscopy

Deshmukh, Kalim; Sankaran, Sowmya; Ahamed, M. Basheer; Sadasivuni, Kishor Kumar; Pasha, Khadheer S.K.; Ponnamma, Deepalekshmi; Sreekanth, P.S. Rama; Chidambaram, K.

doi:10.1016/b978-0-323-46140-5.00010-8

Cited by 34 publications

(26 citation statements)

References 146 publications

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“…The researchers suggested the nanocomposite to be suitable as an electrode material for supercapacitors . Deshmukh et al reinforced PVA/poly(4‐styrenesulfonic acid) (PSSA) blend with GO and calculated electrical parameters such as dielectric constant and dielectric loss. On incorporating 3 wt% GO, contact angle of PVA–PSSA blend decreased from 78.1° to 66.2°, surface energy increased from 36.6 (PVA) to 44 mJ/m 2 , dielectric constant increased from 82.6 (PVA) to 297.9 (at 50 Hz, 150°C), dielectric loss increased from 1.56 (PVA) to 2.64 (at 50 Hz, 150°C).…”

Section: Pva Nanocompositesmentioning

confidence: 99%

“…On incorporating 3 wt% GO, contact angle of PVA–PSSA blend decreased from 78.1° to 66.2°, surface energy increased from 36.6 (PVA) to 44 mJ/m 2 , dielectric constant increased from 82.6 (PVA) to 297.9 (at 50 Hz, 150°C), dielectric loss increased from 1.56 (PVA) to 2.64 (at 50 Hz, 150°C). The prepared flexible nanocomposites are strong candidates for energy storage devices . Pandele et al prepared Chitosan (CS)‐PVA and GO based nanocomposites.…”

Section: Pva Nanocompositesmentioning

confidence: 99%

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Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Aslam

Kalyar

Raza

2018

Polymer Engineering & Sci

459

229

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This review presents the nature, fundamental structure, and various morphologies of native poly(vinyl alcohol) (PVA) matrix. It highlights recent advances in pure PVA and its composites containing various nanofillers that have potential applications in various fields. Over half a century, PVA is known as an auspicious material for diverse applications. The review focuses on the structural, mechanical, optical, and electrical properties of PVA‐based nanocomposites. The study highlights a new promising area of optoelectronics for possible applications of PVA nanocomposites. The challenges and opportunities in working with various PVA nanocomposites are discussed along with some future recommendations are presented to strengthen this area of research. POLYM. ENG. SCI., 58:2119–2132, 2018. © 2018 Society of Plastics Engineers

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Section: Pva Nanocompositesmentioning

confidence: 99%

Section: Pva Nanocompositesmentioning

confidence: 99%

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Aslam

Kalyar

Raza

2018

Polymer Engineering & Sci

459

229

View full text Add to dashboard Cite

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“…Dielectric spectroscopy is a versatile method in the characterization of cellulosic materials, which inspects microscopic dynamics (either diffusional or orientational) of a material and is able to provide unique information regarding the structure and composition on molecular level [10,11,12,13,14,15]. Due to the non-invasion nature as well as other merits like rapidness in measurement, easy instrumentation, and simple sampling requirement [16,17], dielectric spectroscopy is also an effective tool in in-situ and real-time monitoring of kinetic processes, such as annealing of ultrastable glass [18], isothermal crystallization [19,20], and cell division [21].…”

Section: Introductionmentioning

confidence: 99%

Evolution of Dielectric Behavior of Regenerated Cellulose Film during Isothermal Dehydration Monitored in Real Time via Dielectric Spectroscopy

Zhao

Chen

2019

Polymers

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The dielectric relaxation behavior of a regenerated cellulose (RC) film during isothermal dehydration was monitored in real time via dielectric spectroscopy, in order to investigate on one hand the influence of water on its dynamics and the variation of microstructure and phase composition during dehydration on the other. The progression of water loss is clearly revealed by the evolution of the dielectric relaxation behavior with drying time, which suggests two distinctly different drying stages separated by a striking transition period. The dielectric relaxation behavior at the first drying stage is found overwhelmingly dominated by ionic motion, and that at the second stage is basically a result of molecular dynamics. The mechanisms of these relaxations are proposed, through which the influence of water on the dynamics of the RC film and the variation of the microstructure and phase composition of the film at different hydration state are discussed in detail. An interesting finding is that highly ordered but noncrystalline arrangement of cellulose molecules exists, but it can be formed only when the film is in specific hydration state. This study demonstrates that dielectric spectroscopy is an effective tool in real-time monitoring kinetic process.

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“…However, the dielectric constant for all the nanocomposites was gradually decreasing and becomes nearly constant at a higher frequency. At high frequency, the low values of dielectric constant are because of the interruption in dipoles orientation in the direction of an applied electric field, whereas the higher values of dielectric constants at lower frequencies are due to interfacial and dipolar polarization 46–48 …”

Section: Resultsmentioning

confidence: 99%

Dielectric and electromagnetic interference shielding properties of zeolite13Xand carbon black nanoparticles basedPVDFnanocomposites

Rani

Ahamed

Deshmukh

2020

J of Applied Polymer Sci

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In the present work, Zeolite 13X and carbon black nanoparticles (CBNPs) reinforced polyvinylidene fluoride (PVDF) nanocomposites were obtained by a simple solvent casting technique. The structural, morphological and thermal properties of PVDF/Zeolite 13X/CBNPs nanocomposites with various loadings of Zeolite 13X and CBNPs were investigated using Fourier-transform infrared spectroscopy, X-ray diffraction, Scanning electron microscopy and thermo-gravimetric analysis. The dielectric studies were carried out in the 50 Hz-10 MHz frequency range at room temperature. The electromagnetic interference (EMI) shielding effectiveness (SE) of PVDF/Zeolite 13X/CBNPs nanocomposite was investigated in the 8-18 GHz frequency region (X-band and Ku-band). The maximum EMI SE of approximately −11.1 dB (8-12 GHz) and −11.5 dB (12-18 GHz) was observed for PVDF/CBNPs nanocomposites with 10 wt% loading of CBNPs. These findings emphasize the application of PVDF/ Zeolite 13X/CBNPs nanocomposites as a potential EMI shielding material.

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Dielectric Spectroscopy

Cited by 34 publications

References 146 publications

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Evolution of Dielectric Behavior of Regenerated Cellulose Film during Isothermal Dehydration Monitored in Real Time via Dielectric Spectroscopy

Dielectric and electromagnetic interference shielding properties of zeolite13Xand carbon black nanoparticles basedPVDFnanocomposites

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