Nonlinear optical and dielectric properties of TiO2 nanoparticles incorporated PEO/PVP blend matrix based multifunctional polymer nanocomposites

Sengwa, R. J.; Choudhary, Shobhna; Dhatarwal, Priyanka

doi:10.1007/s10854-019-01587-4

Cited by 72 publications

(54 citation statements)

References 62 publications

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“…Further, as compared to peaks intensities and positions of NSPE0 film, it is found that there is an increase in intensities of the PEO and PVDF peaks with a small change in their positions for the NSPE2 film (see 2θ and I values given in Table 1). Furthermore, a low intensity peak at 25.17° (101) is also exhibited in the XRD pattern of this film which is the main characteristic peak of tetragonal anatase TiO 2 [73]. Besides this peak, several weak intensity peaks around 27°, 36.08°, 37.75°, and 47.92° can be noted with increasing TiO 2 contents in the films attributing to anatase and rutile phases of TiO 2 [73].…”

Section: Xrd Spectra and Crystal Structuresmentioning

confidence: 62%

“…Furthermore, a low intensity peak at 25.17° (101) is also exhibited in the XRD pattern of this film which is the main characteristic peak of tetragonal anatase TiO 2 [73]. Besides this peak, several weak intensity peaks around 27°, 36.08°, 37.75°, and 47.92° can be noted with increasing TiO 2 contents in the films attributing to anatase and rutile phases of TiO 2 [73]. It is also observed from these XRD patterns that with the increase of TiO 2 concentrations up to 20 wt%, the peaks intensities of both the polymers decrease anomalously, whereas there is a gradual increase in the intensities of TiO 2 peaks.…”

Section: Xrd Spectra and Crystal Structuresmentioning

confidence: 76%

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Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dhatarwal

Sengwa

2020

SN Appl. Sci.

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The effect of TiO 2 nanofiller concentration on the dielectric polarization and relaxation processes of (75PEO/25PVDF)/25 wt% LiClO 4-x wt% TiO 2 (x = 0, 2, 5, 10, 15, and 20) compositions based nanocomposite solid polymer electrolyte (NSPE) films has been investigated by employing the dielectric relaxation spectroscopy. The SEM micrographs demonstrate that the dispersion of TiO 2 nanoparticles enormously alters the spherulitic morphology with the development of some cracks, pores, and wrinkles of these solution-cast prepared NSPE films. The X-ray diffraction study confirms that the heterostructures of these NSPE materials are semicrystalline and their degree of crystallinity increases irregularly with the increase of TiO 2 concentration, however the crystallinity of host polymer blend matrix of these electrolytes decreases. The complex dielectric permittivity spectra of these NSPE materials in the frequency range from 20 Hz to 1 MHz at 27 °C reveal that there is a dominant contribution of electrode polarization and interfacial polarization at lower frequencies, whereas the high frequency permittivity values attribute to dipolar and ionic polarizations. Four types of relaxation processes have been probed by the 'master curve representation' of the dielectric and electrical spectra of these solid ion-dipole complexes. It is observed that the addition of TiO 2 nanoparticles up to 10 wt% in these electrolytes influences the dielectric properties anomalously, but a huge decrease in the dielectric polarization and increase in the relaxation times are noted resulting in a significant decrease in the ionic conductivity of the film at 20 wt% TiO 2 concentration. The dependence of dc ionic conductivity of these lithium-ion conducting NSPE materials on the chain segmental relaxation time and also the degree of crystallinity has been explored. The results of these NSPE materials have also been compared with the TiO 2 nanoparticles loaded different polymer matrices and salts based electrolytes and discussed appropriately. These lithium-ion based electrolyte films are accredited for the solid-state ion-conducting energy storing devices from their electrochemical parameters characterized by LSV, CV, and CA techniques.

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Section: Xrd Spectra and Crystal Structuresmentioning

confidence: 62%

Section: Xrd Spectra and Crystal Structuresmentioning

confidence: 76%

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dhatarwal

Sengwa

2020

SN Appl. Sci.

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“…This confirms the polymorphism of PVDF [38]. The low intensity peaks at 25.17°, 27°, 37.75°, and 47.92° in the XRD pattern of NCPE films belong to TiO2 [39]. The crystalline peaks at 22°, 25°, 32° and 36° pertaining to NaClO4 [40] were not found in the NCPE films, which confirms that NaClO4 is completely complexed in the blend of polymers PEO and PVDF.…”

Section: Xrd Studiesmentioning

confidence: 54%

Effect of TiO2 Nano-filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Ganta¹,

Jeedi²,

Kumar

et al. 2021

Preprint

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Nanocomposite Polymer Electrolyte (NCPE) films based on a blend of two polymers poly (ethylene oxide) (PEO) and poly (vinylidene fluoride) (PVDF) complexed with sodium perchlorate (NaClO4) salt and Nano-filler Titanium dioxide (TiO2) (i.e., (80wt%PEO/20wt%PVDF) + 7.5wt%NaClO4+ xwt%TiO2 where x = 3, 6, 9, 12, 15, and 18) were prepared and characterized as potential candidates for battery applications. Electrochemical Impedance Spectroscopy (EIS) has been employed between the frequencies 10 Hz and 4 MHz to investigate electrical, dielectric and electric modulus properties of the prepared NCPE films. Effect of TiO2 Nano-filler concentration on the structural, ionic conductivity, and dielectric relaxation has been studied. The AC conductivity of the NCPE films at high frequencies obeys Jonscher’s power law. The values of DC ionic conductivity calculated by fitting the AC conductivity spectra to the best fit of Joncher’s power law are consistent with the values of DC ionic conductivity calculated from the bulk resistance (Rb) of the NCPE films. The ionic conductivity that depends on temperature follows the Arrhenius rule between the temperatures 298 K and 328 K. The maximum ionic conductivity at ambient temperature 8.75x10-5 S/cm was obtained for (80wt%PEO/20wt%PVDF) +7.5wt%NaClO4 +15wt%TiO2 NCPE film and it is attributed to the decrease in crystallinity. Using Wagner’s polarization technique ionic transport numbers of various NCPE films were measured.

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“…[7][8][9] Blending modification methods based on chemical or physical processes can improve the mechanical, heatresistant and insulating properties of epoxy resin thermosets. [10][11][12] Many scholars have carried out fruitful research in this area and have achieved rich research results. Ma et al 13 physically blended epoxy resin and organophosphorus flame retardant (DPOD) to modify combustion properties of epoxy resin thermoset.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics study on thermal and mechanical properties of AOO modified DGEBA‐anhydride insulating materials for high voltage GIS

Zhao

Zhang

et al. 2021

J of Applied Polymer Sci

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Increases in rated voltage and power density of high voltage gas insulated switchgears (GIS) impose stringent requirements on the diglycidyl ether of bisphenol A (DGEBA)-anhydride thermoset, which is widely used as insulation materials for high GIS, for higher mechanical and heat-resistant properties. In this paper, 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate (AOO) was copolymerized with DGEBA -anhydride system to increase the mechanical and thermal properties of the thermosets. Based on the molecular dynamics simulation method, the coefficient of thermal expansion, glass transition temperature (T g ), and modulus of AOO copolymer-modified DGEBAanhydride thermosets were calculated. The AOO copolymer-modified DGEBA-anhydride thermosets specimens were further experimentally prepared and subjected to differential scanning calorimeter test, TGA test, tensile bending test, and dielectric test. The results of simulation and experiment simultaneously indicated that the T g and modulus of the DGEBA-anhydride thermoset are enhanced after AOO modification. This is mainly due to the decrease in free volume percentage and mean square displacement of the epoxy cross-linked network structure after the introduction of AOO molecules, which makes the structure more compact and the cross-link density increased.Additionally, the dielectric performances of the thermoset was enhanced by AOO. The excellent thermal, mechanical and dielectric properties of AOO modified DGEBA-anhydride thermoset make it a promising application in the field of high voltage GIS.

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Nonlinear optical and dielectric properties of TiO2 nanoparticles incorporated PEO/PVP blend matrix based multifunctional polymer nanocomposites

Cited by 72 publications

References 62 publications

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Effect of TiO2 Nano-filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte

Molecular dynamics study on thermal and mechanical properties of AOO modified DGEBA‐anhydride insulating materials for high voltage GIS

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Nonlinear optical and dielectric properties of TiO2 nanoparticles incorporated PEO/PVP blend matrix based multifunctional polymer nanocomposites

Cited by 72 publications

References 62 publications

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Effect of TiO2 Nano-filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF&nbsp;Based Blended Polymer Electrolyte

Molecular dynamics study on thermal and mechanical properties of AOO modified DGEBA‐anhydride insulating materials for high voltage GIS

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Effect of TiO2 Nano-filler on Electrical Properties of Na+ Ion Conducting PEO/PVDF Based Blended Polymer Electrolyte