Dielectric properties of polyvinyl alcohol (PVA) nanocomposites filled with green synthesized zinc sulphide (ZnS) nanoparticles

Reddy, P. Lokanatha; Deshmukh, Kalim; Chidambaram, K.; Ali, M. M.; Sadasivuni, Kishor Kumar; Kumar, Y. Ravi; Lakshmipathy, R.; Pasha, S. K. Khadheer

doi:10.1007/s10854-019-00761-y

Cited by 114 publications

(44 citation statements)

References 58 publications

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“…However, the largest value of the dielectric constant was 76.3 for 10 wt% loading of CBNPs in the PVDF matrix. The high values of dielectric constant at lower frequencies are attributed to the progression of interfacial polarization mechanisms, 45 indicating good dispersion and interaction of Zeolite13X and CBNPs in the PVDF matrix. However, the dielectric constant for all the nanocomposites was gradually decreasing and becomes nearly constant at a higher frequency.…”

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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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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“…Furthermore, ZnS is easily fabricated, non-toxic, and widely used. To date, many research groups have successfully synthesized low-dimensional nanomaterials such as ZnS nanoparticles [40,98,101,[111][112][113][114][115][116][117], nanowires [118][119][120][121][122], nanotubes [123][124][125][126], and nanosheets [127,128].…”

Section: Zns Series Photocatalystmentioning

confidence: 99%

Recent Advances and Applications of Semiconductor Photocatalytic Technology

et al. 2019

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Along with the development of industry and the improvement of people’s living standards, peoples’ demand on resources has greatly increased, causing energy crises and environmental pollution. In recent years, photocatalytic technology has shown great potential as a low-cost, environmentally-friendly, and sustainable technology, and it has become a hot research topic. However, current photocatalytic technology cannot meet industrial requirements. The biggest challenge in the industrialization of photocatalyst technology is the development of an ideal photocatalyst, which should possess four features, including a high photocatalytic efficiency, a large specific surface area, a full utilization of sunlight, and recyclability. In this review, starting from the photocatalytic reaction mechanism and the preparation of the photocatalyst, we review the classification of current photocatalysts and the methods for improving photocatalytic performance; we also further discuss the potential industrial usage of photocatalytic technology. This review also aims to provide basic and comprehensive information on the industrialization of photocatalysis technology.

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“…Finally, the morphology of the PVA/NiS nanocomposite films was investigated using HRTEM and the results are shown in figure 11. The HRTEM images of PVA/NiS nanocomposite films filled with 3 wt% of NiS NPs (figures 11(a)-(d)) revealed that the NiS NPs have been uniformly dispersed in the PVA matrix revealing good compatibility between the polymer matrix and the nanofiller [12].…”

Section: Thermal Analysismentioning

confidence: 99%

“…So, there is a necessity that the NPs have to be dispersed homogeneously within the polymer matrix because it causes an improvement in the chemical and physical properties of the PNCs [8,9]. Therefore, to control the functioning of PNCs, two important parameters are required i.e., the spatial distribution of NPs and their interactions with the host polymer matrix [10][11][12]. For the past few years, it has been considered that the improved dielectric properties of the PNCs loaded with inorganic NPs is believed to be a strong candidate for energy storage applications [13,14].…”

Section: Introductionmentioning

confidence: 99%

Enhanced dielectric properties of green synthesized Nickel Sulphide (NiS) nanoparticles integrated polyvinylalcohol nanocomposites*

Reddy

Deshmukh

Kovařík

et al. 2020

Mater. Res. Express

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A green synthesis approach has been adopted to prepare nickel sulphide nanoparticles (NiS NPs) using banana peel extract (BPE) as a reducing and capping agent. Polyvinyl alcohol (PVA)/NiS nanocomposite films were fabricated using a cost-effective solution casting technique by dispersing different contents of NiS NPs (0-3 wt%) in the PVA matrix. Various characterization techniques were employed to analyze the structural, thermal and morphological properties of the PVA/NiS nanocomposite films. Further, the dielectric behaviour of these nanocomposite films was investigated at frequency range 50 Hz-20 MHz and in the temperature range 40°C-140°C. Also, there exists a significant interaction between the polymer matrix and the nanofiller as evident from the notable improvement in the dielectric properties of the nanocomposites. The dielectric constant (ε) value of PVA/NiS nanocomposite film with 3 wt % NiS NPs loading was found to be 154.55 at 50 Hz and at 140°C which is 22 times greater than the dielectric constant value of neat PVA (6.90). These results suggest that NiS NPs were dispersed homogeneously in the PVA matrix.Among various polymers used for the fabrication of PNCs, polyvinyl alcohol (PVA) is most often preferred as a host matrix owing to its excellent film-forming ability, higher dielectric strength, the capability to form strong hydrogen bonding, easy processability, excellent chemical stability, and highly durable nature [17]. PVA has been employed for various applications such as in battery components, packaging, textile applications in the microelectronic industry, electromagnetic interference applications and so on [17,18]. Several research groups reported the dielectric properties of the PVA based nanocomposites [19][20][21]. With this inspiration, in the present study PVA has been chosen as a host polymer to synthesize PVA based nanocomposites. Now a day, more attention has been focussed on metal sulphide nanostructures because of their unique properties and applications [22]. Among these, nickel sulphide (NiS) has been mostly investigated because of its simple production, affordable price and high electronic conductivity [23,24]. It exhibits complicated electrical, optical, structural, compositional and magnetic phase behaviour [25]. Also due to the possession of multi-phases, binary Ni-S systems such as NiS 2 , Ni 3 S 4 , Ni 9 S 8 , Ni 7 S 6 , Ni 6 S 5 , Ni 4 S 3+x , Ni 3 S 2 , and Ni 3+x S 2 have become fascinated materials [26]. NiS NPs exhibit different shapes such as layer-rolled structures, urchin-like nanocrystallites, flower-like architectures, hollow spheres, nanoframes, nanorods, and nanospheres etc [27,28].Recently, increased attention has been given to the green approach for the synthesis of NPs because of its several advantages [29][30][31][32]. For the synthesis of NPs, the plant extracts which serve as reducing/capping agents are considered to be more beneficial than remaining techniques [33]. Several researchers reported the synthesis of metal sulphide NPs through a green synthesis a...

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Dielectric properties of polyvinyl alcohol (PVA) nanocomposites filled with green synthesized zinc sulphide (ZnS) nanoparticles

Cited by 114 publications

References 58 publications

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

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

Recent Advances and Applications of Semiconductor Photocatalytic Technology

Enhanced dielectric properties of green synthesized Nickel Sulphide (NiS) nanoparticles integrated polyvinylalcohol nanocomposites*

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