Structural, optical, mechanical and dielectric properties of titanium dioxide doped PVA/PVP nanocomposite

Rajesh, Kumar; Crasta, Vincent; Kumar, Nikhil; Shetty, Gananatha; Rekha, P. D.

doi:10.1007/s10965-019-1762-0

Cited by 195 publications

(90 citation statements)

References 45 publications

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“…While 330 nm absorption edge is referred to the π → π* transition (C=O group) along the main PVP chains. The obtained PVP data is well-matched with the published works [35,39,40]. Moreover, according to the transmittance spectra of the polymeric composite films shown in Fig.…”

Section: Optical Analysissupporting

confidence: 88%

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Badawi

2021

Appl. Phys. A

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The optical properties of polyvinylpyrrolidine (PVP) polymer have been enhanced using ternary Zn 1-x Sn x S as a filler for UVregion optical applications. Solution casting technique is used to prepare different Sn molar ratios (x: 0-0.3) in Zn 1-x Sn x S filled PVP polymeric composite films (1.0 wt.%). SEM, FT-IR and UV-visible-NIR spectrophotometry is utilized to characterize the optical properties of the plain PVP and polymeric composite films. SEM images reveal the homogeneous dispersion of the filler (Zn 1-x Sn x S) in the host PVP matrix. The FT-IR spectroscopic measurements ensure the successful interaction of ternary Zn 1-x Sn x S material and the host PVP polymer. The cut off transmittance edge is shifted from 260 nm (host PVP) to 390 nm (polymeric composite). The direct optical energy bandgap of the prepared polymeric composite films are shifted from 4.78 eV (plain PVP) to 3.45 eV for Zn 0.7 Sn 0.3 S polymeric composite film. An enhancement of the refractive index (n) and the optical conductivity (σ opt.) of the polymeric composite films is achieved as compared with those of the plain one. The single oscillator (E 0) and dispersion (E d) energies of the polymeric composite films were determined using Wemple and DiDomenico (WDD) model. The prepared polymeric composite films are strongly recommended for UV-region optical applications.

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Section: Optical Analysissupporting

confidence: 88%

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Badawi

2021

Appl. Phys. A

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“…The Young's modulus (Y) of PVA also increased as SrO nanofillers increased (see Figure F). The Young's modulus of the developed PVA nanocomposites in this study is higher than the one reported in literature . However, the percentage of elongation at break reduced as the loading of SrO nanofillers in the host matrix increased (Figure G).…”

Section: Resultscontrasting

confidence: 58%

Enhancement in thermal, mechanical and electrical properties of novel PVA nanocomposite embedded with SrO nanofillers and the analysis of its thermal degradation behavior by nonisothermal approach

Selvi

Parthasarathy

Mahalakshmi³

et al. 2019

Polymer Composites

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Effect of SrO nanofillers on the physical and chemical properties of newly prepared PVA nanocomposites was investigated in‐depth in this article. The structure of SrO nanopowder and PVA nanocomposites were analyzed using FTIR for surface chemistry and XRD for crystallographic nature. The extent of dispersion and particle size of SrO nanopowders were obtained from TEM micrographs. The average particle size of the SrO nanopowder was 57 nm. The uniformly dispersed SrO nanofillers in the host PVA matrix were observed from the TEM micrographs. The prepared PVA nanocomposites displayed a high absorption in the UV region. The thermal stability of PVA nanocomposites was enhanced after the addition of SrO nanofillers. The nonisothermal degradation study was carried out using different kinetic models for the prepared PVA nanocomposites. The Young's modulus (Y) and tensile strength of the PVA nanocomposites were higher than that of the pristine PVA. The DC conductivity of PVA was also increased when the PVA was embedded with the SrO nanoparticles. Highlights The novel PVA nanocomposites embedded with SrO nanofillers were prepared by the solution casting method. The band gap of PVA was decreased gradually while increasing the concentration of SrO nanofillers. The thermal degradation of polymer composites was studied under nonisothermal heating using several kinetic models. The thermal stability of PVA was enhanced after the addition of SrO nanofillers. The electrical and mechanical Properties of PVA nanocomposites were also improved.

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“…It showed that the maximum absorption occurred at the dose (D = 1 × 10 12 ions/cm 2 ). To identify the existence of energy band gap behavior of pristine and implanted PMMA samples, the UV-vis spectra translated into Tauc’s plot used the following equation [ 38 ],

where α is the absorption coefficient, hv is the incident photon, E g is the optical band gap and B is energy independent constant.…”

Section: Resultsmentioning

confidence: 99%

Section: Photoluminescence and Uv-vis Analysismentioning

confidence: 99%

Effect of Cu Ions Implantation on Structural, Electronic, Optical and Dielectric Properties of Polymethyl Methacrylate (PMMA)

et al. 2021

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In this work, the effect of ion bombardment on the optical properties of Polymethylmethacrylate (PMMA) was studied. Polymer samples were implanted with 500 keV Cu+ ions with a fluence ranging from 1 × 1012 to 1 × 1014 ions/cm2. X-ray Diffractometer (XRD) study indicated a relatively lower variation with a higher dose of ions. Fourier Transform Infrared (FTIR) spectra exhibited that with the implantation of Cu ions the intensity of existing bands decreases, while the result confirms the existence of a C=C group. The pristine and ion-implanted samples were also investigated using photoluminescence (PL) and Ultra Violet-Visible (UV-VIS) spectra. The optical band gap (Eg) was observed up to 3.05 eV for the implanted samples, while the pristine sample exhibited a wide energy-gap up to ~3.9 eV. The change in the optical gap indicated the presence of a gradual phase transition for the polymer blends. The dielectric measurements of the pristine and Cu-implanted PMMA were investigated in the 10 Hz to 2 GHz frequency range. It was found that the implanted samples showed a significant decrease in the value of the dielectric constant. The value of the dielectric constant and dielectric loss of the PMMA and Cu-implanted samples at a 1-kHz frequency were found to be ~300 and 29, respectively. The modification of the PMMA energy bandgap in the current research suggested the potential use of Cu implanted PMMA in the field of optical communications and flexible electronic devices.

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Structural, optical, mechanical and dielectric properties of titanium dioxide doped PVA/PVP nanocomposite

Cited by 195 publications

References 45 publications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Enhancement in thermal, mechanical and electrical properties of novel PVA nanocomposite embedded with SrO nanofillers and the analysis of its thermal degradation behavior by nonisothermal approach

Effect of Cu Ions Implantation on Structural, Electronic, Optical and Dielectric Properties of Polymethyl Methacrylate (PMMA)

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