Influence of SiO2 nanoparticles on morphological, thermal, and dielectric properties of PVDF

Gaur, M. S.; Indolia, Ajay Pal; Рогачев, А. А.; Rahachou, A.V.

doi:10.1007/s10973-015-4872-x

Cited by 39 publications

(15 citation statements)

References 54 publications

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“…This may be due to the accumulation of charge at the interface in the heterostructure materials which provides strong interfacial polarization, thus improving the dielectric constant 37 . The above finding is superior to the results of the dielectric constant of PVDF‐Er 2 O 3, 31 PVDF‐SiO 2 29 and PVDF‐Y 2 O 3 2 nanocomposites. Furthermore, the current value of the dielectric constant for PVDF/PVP/Co 3 O 4 at 4.0 wt% is nearly equal to the dielectric constant of PVDF‐ZnO with 10.0 wt% 22 …”

Section: Resultsmentioning

confidence: 76%

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Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Taha

Mahmoud

Hamdeh

2021

Polymer International

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The main objective of this research was to prepare high thermal and dielectric performance PVDF/PVP/Co3O4 nanocomposites (PVDF, oply(vinylidene fluoride); PVP, polyvinylpyrrolidone) using the method of solution mixing. The structural properties and thermal stability of the samples were examined through measurements of XRD, SEM, Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). From the XRD measurements, the cubic crystal structure of the Co3O4 nanoparticles was revealed with an average size of 17 nm. Also, diffraction peaks of the α‐phase were seen in PVDF/PVP/Co3O4 nanocomposite spectra. The SEM images for the surface of the films showed a homogeneous distribution of the nanoparticles. The absorption peaks of both α‐ and β‐phases were confirmed by measurements of the FTIR spectra. The nanocomposite films grafted with Co3O4 nanoparticles possess high thermal stability. The dielectric permittivity and energy density of the nanocomposites improved significantly at 4.0 wt% Co3O4. Finally, the increase in Co3O4 content caused an improvement in dielectric response function as well as electrical conductivity. © 2021 Society of Industrial Chemistry.

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Section: Resultsmentioning

confidence: 76%

“…We conclude from this that there is a congruence between the XRD measurements and the FTIR spectra of the polymer nanocomposites. This result is an indication of the interaction between the Co 3 O 4 and the PVDF/PVP polymer matrix 29 …”

Section: Resultsmentioning

confidence: 79%

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Taha

Mahmoud

Hamdeh

2021

Polymer International

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“…The area under the observed PVDF melting peak was compared to the melting enthalpy of a hypothetical 100% crystalline sample, assuming 104.6 J/g as the enthalpy value of the perfect crystal. [28][29][30] For composites, the measured enthalpy values were normalized to the actual content of PVDF in each sample.…”

Section: Characterization Methodsmentioning

confidence: 99%

Improved dielectric properties of poly(vinylidene fluoride)–BaTiO₃ composites by solvent‐free processing

Brunengo

Conzatti

Schizzi

et al. 2020

J of Applied Polymer Sci

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Composites of poly(vinylidene fluoride) (PVDF) and BaTiO3 nanoparticles (average diameter ca. 125 nm) are fabricated by a solvent‐free and industrially scalable technique, that is, melt blending, followed by compression molding. The effect of processing parameters on the spectroscopic, microstructural, thermal, mechanical and dielectric properties are evaluated as a function of composition (loading up to 30 vol%). The presence of nanoparticle inclusions as well as specific compression molding parameters demonstrate both to affect the molecular relaxations of the PVDF matrix, studied by correlating the results of different techniques, and to induce the PVDF crystallization as β phase. Processing parameters also play a key role for optimizing the dielectric properties. An improved dielectric behavior of the composites is obtained in terms of both permittivity, whose value increases up to four times that of neat PVDF, and dielectric losses, lower than 5% between 10 and 3·104 Hz. The obtained performances resulted enhanced compared to analogous composites prepared with the use of solvents.

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“…First, TiO 2 and SiO 2 can function as temporary crosslinkers between the macromolecular chains 36,52 and also additional secondary interactions can be formed between nanofillers and PVdF. 49 For all samples, after the addition of nanofillers, tensile strain values dropped. Incorporation of inorganic nanofillers made the nanofibers more rigid and samples were broken at lower level of strain.…”

Section: Mechanical Characterizationmentioning

confidence: 96%

“…47,48 As previously reported additional hydrogen bonds that were formed between SiO 2 and PVdF enhanced the interfacial and thermal properties of the system. 49 Since filler ratio is low, the low-temperature weight loss region observed for TiO 2 and SiO 2 was not seen for NCFs and BCFs.…”

Section: Thermogravimetric Analysismentioning

confidence: 98%

PVdF‐based electrospun fibers with various morphologies and their separator applications for secondary batteries

Toprakçi

2021

Polymers for Advanced Techs

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In this study, pristine PVdF nanofibers (PPFs), nanocomposite fibers (NCFs), and bicomponent fibers (BCFs) were prepared by electrospinning. TiO 2 and SiO 2 nanofillers were used in order to tune the properties and performance of the separators. The morphology, thermal degradation behavior, thermal dimensional stability, mechanical properties, porosity, electrolyte uptake, and electrochemical performance of the samples were investigated. All three morphologies were successfully fabricated under optimized conditions and 15 wt% polymer concentration was found electrospinnable at 0.4 ml h −1 feed rate and under 15 kV applied voltage. Viscosity and conductivity of the spinning solutions were found significant for the fiber morphology. For nanocomposite and bicomponent fibers, TiO 2 and SiO 2 nanofillers were found to be well dispersed throughout the fiber axis with good adhesion to the matrix. Nanofillers were found to increase the thermal stability, mechanical strength,

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Influence of SiO2 nanoparticles on morphological, thermal, and dielectric properties of PVDF

Cited by 39 publications

References 54 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Improved dielectric properties of poly(vinylidene fluoride)–BaTiO₃ composites by solvent‐free processing

PVdF‐based electrospun fibers with various morphologies and their separator applications for secondary batteries

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Influence of SiO2 nanoparticles on morphological, thermal, and dielectric properties of PVDF

Cited by 39 publications

References 54 publications

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co3O4 nanocomposites

Improved dielectric properties of poly(vinylidene fluoride)–BaTiO3 composites by solvent‐free processing

PVdF‐based electrospun fibers with various morphologies and their separator applications for secondary batteries

Contact Info

Product

Resources

About

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Enhanced thermal and dielectric performance in ternary PVDF/PVP/Co₃O₄ nanocomposites

Improved dielectric properties of poly(vinylidene fluoride)–BaTiO₃ composites by solvent‐free processing