AC conductivity and dielectric characteristics of PVA/PVP nanocomposite filled with MWCNTs

Abdelrazek, E.M.; Abdelghany, A.M.; Tarabiah, A. E.; Zidan, H. M.

doi:10.1007/s10854-019-01929-2

Cited by 93 publications

(70 citation statements)

References 40 publications

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“…However, no definitive peaks can be observed for the ′ plot, and the ′′ spectrum shows an asymmetry relaxation peak accompanied by the dispersion of ′ in the frequency range employed in this study. The broadness and asymmetry shape of the ′′ peak disclose the distribution of relaxation time and non-Debye relaxation process [14,45]. A shift in the ′′ relaxation peak towards the higher-frequency side with a temperature rise indicates the reduction in the relaxation time, which directly supports the ionic conductivity enhancement as a consequence of an increase in the mobility of free ions [17].…”

Section: Dielectric Studymentioning

confidence: 68%

“…However, no definitive peaks can be observed for the M plot, and the M spectrum shows an asymmetry relaxation peak accompanied by the dispersion of M in the frequency range employed in this study. The broadness and asymmetry shape of the M peak disclose the distribution of relaxation time and non-Debye relaxation process [14,45].…”

Section: Dielectric Studymentioning

confidence: 92%

“…Polyvinyl alcohol (PVA) has been extensively used as the host for electrolyte systems due to its hydrophilic properties, non-toxicity, water-solubility, biocompatibility, biodegradability, low cost, and good film-forming properties [12,13]. The hydroxyl (O-H) groups of PVA help in the dissociation of salts at high concentrations to form an ionic medium as a result of hydrogen bonding, which makes the PVA matrix a potential candidate in electronics and optoelectronics applications [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Effect of ZnO Nanoparticle Content on the Structural and Ionic Transport Parameters of Polyvinyl Alcohol Based Proton-Conducting Polymer Electrolyte Membranes

et al. 2021

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Proton conducting nanocomposite solid polymer electrolytes (NSPEs) based on polyvinyl alcohol/ammonium nitrate (PVA/NH4NO3) and different contents of zinc oxide nanoparticles (ZnO-NPs) have been prepared using the casting solution method. The XRD analysis revealed that the sample with 2 wt.% ZnO-NPs has a high amorphous content. The ionic conductivity analysis for the prepared membranes has been carried out over a wide range of frequencies at varying temperatures. Impedance analysis shows that sample with 2 wt.% ZnO-NPs has a smaller bulk resistance compared to that of undoped polymer electrolyte. A small amount of ZnO-NPs was found to enhance the proton-conduction significantly; the highest obtainable room-temperature ionic conductivity was 4.71 × 10−4 S/cm. The effect of ZnO-NP content on the transport parameters of the prepared proton-conducting NSPEs was investigated using the Rice–Roth model; the results reveal that the increase in ionic conductivity is due to an increment in the number of proton ions and their mobility.

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Section: Dielectric Studymentioning

confidence: 68%

Section: Dielectric Studymentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

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Effect of ZnO Nanoparticle Content on the Structural and Ionic Transport Parameters of Polyvinyl Alcohol Based Proton-Conducting Polymer Electrolyte Membranes

et al. 2021

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“…The values of the estimated slope or the exponent 1 < s < 2 samples, that may be related to the electronic mechanism of conduction. Where the transport conduction mechanism of the electric charges in sample corresponds to the well‐localized hopping and/or reorientation motion 61 . Where the extracted values of s decrease with increasing the doping ratio for 3blend and 4blend, this result may be due to improvements toward to the ohmic conduction the samples.…”

Section: Resultsmentioning

confidence: 97%

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Nawar

Ali

Khairy

et al. 2022

Polymers for Advanced Techs

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Herein, a novel proposed optical attenuator poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP) doped PbS (NPs) nanoparticles nanocomposites films. The samples are fabricated by casting‐method to analyze the linear optical properties and estimate the nonlinear optical parameters. The crystal and molecular structure of the fabricated nanocomposites thick (PVA/PVP) films of different PbS (NPs) doping ratios were analyzed by XRD technique and FT‐IR, respectively. The semi‐crystalline nature of the fabricated PVA/PVP is influenced through all samples and the crystallinity is increased. The particle size of PbS (NPs) is increased in the doped samples and the strain parameter is increased. The measured transmission of the fabricated PVA/PVP doped PbS (NPs) films are decreased as the doping ratio of PbS (NPs) is increased. The absorption coefficient is incremented and shows large absorption values in the UV regions, may be utilized in UV‐blocking for saving the human skin, dramatically, and a noticed red‐shift in the edge of absorption for all samples as the doping ratio is increased. The most probable transition is indirect, and the evolved values of the energy gaps between HOMO and LUMO levels are decrement from 3.97 to 2.65 eV as doping ratio of PbS (NPs) is increased. Different models are utilized to evaluate the average values of the real refractive index (2.175–2.438). The fabricated PVA/PVP doped PbS (NPs) samples are investigated for normal light and laser attenuations. The mass attenuation coefficient increases, gradually, with increment of PbS (NPs), but the half value layer (HVL) parameter decreases with increasing of the doping ratio. These experimental results confirm the applicability of the fabricated samples to attenuate Red‐632 nm and Green‐532 nm laser radiation. It is possible to utilize PVA/PVP doped PbS (NPs) nanocomposites in different, wide‐scale optical filters.

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“…PVP is a very good hydrophilic polymer with good biocompatibility, excellent film-forming properties, non-toxicity, biodegradability, and low surface tension [34,35]. PVP also possess electrical conductivity as its intrinsic characteristic and charge storage capacity [36,37]. PVP has a strong interaction with both CMC and PVA.…”

Section: Introductionmentioning

confidence: 99%

Optimized Loading of Carboxymethyl Cellulose (CMC) in Tri-component Electrospun Nanofibers Having Uniform Morphology

Hashmi

Ullah

et al. 2020

Polymers

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Cellulose is one of the most hydrophilic polymers with sufficient water holding capacity but it is unstable in aqueous conditions and it swells. Cellulose itself is not suitable for electrospun nanofibers’ formation due to high swelling, viscosity, and lower conductivity. Carboxymethyl cellulose (CMC) is also super hydrophilic polymer, however it has the same trend for nanofibers formation as that of cellulose. Due to the above-stated reasons, applications of CMC are quite limited in nanotechnology. In recent research, loading of CMC was optimized for electrospun tri-component polyvinyl alcohol (PVA), polyvinylpyrrolidone (PVP), and carboxymethyl cellulose (CMC) nanofibers aim at widening its area of applications. PVA is a water-soluble polymer with a wide range of applications in water filtration, biomedical, and environmental engineering, and with the advantage of easy process ability. However, it was observed that only PVA was not sufficient to produce PVA/CMC nanofibers via electrospinning. To increase spinnability of PVA/CMC nanofibers, PVP was selected as the best available option because of its higher conductivity and water solubility. Weight ratios of CMC and PVP were optimized to produce uniform nanofibers with continuous production as well. It was observed that at a weight ratio of PVP 12 and CMC 3 was at the highest possible loading to produce smooth nanofibers.

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AC conductivity and dielectric characteristics of PVA/PVP nanocomposite filled with MWCNTs

Cited by 93 publications

References 40 publications

Effect of ZnO Nanoparticle Content on the Structural and Ionic Transport Parameters of Polyvinyl Alcohol Based Proton-Conducting Polymer Electrolyte Membranes

Effect of ZnO Nanoparticle Content on the Structural and Ionic Transport Parameters of Polyvinyl Alcohol Based Proton-Conducting Polymer Electrolyte Membranes

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Optimized Loading of Carboxymethyl Cellulose (CMC) in Tri-component Electrospun Nanofibers Having Uniform Morphology

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