<scp>Pani‐Ag</scp>/<scp>PVA</scp> nanocomposite: Gamma induced changes in the thermal and optical characteristics

Alhazime, Ali A.; Benthami, K.; Alsobhi, B. O.; Ali, Ghareib W.; Nouh, S. A.

doi:10.1002/vnl.21782

Cited by 44 publications

(8 citation statements)

References 32 publications

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“…[ 1 ] Moreover, Heiba et al showed that the optical and dielectric properties of PVA/CMC blend could be improved by chalcogenide nano fillers. [ 10 ] Furthermore, the effect of the gamma irradiation on the optical and thermal properties of Pani‐Ag/PVA nanocomposites (NCs) was examined in Reference [39].…”

Section: Introductionmentioning

confidence: 99%

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Badawi

Alharthi

Althobaiti

et al. 2021

Vinyl Additive Technology

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The effect of iron oxide nanoparticles (Fe2O3 NPs) content on the structural and optical parameters of polyvinyl alcohol/graphene (PVA/G) blend has been investigated. Fe2O3 NPs were synthesized by the hydrothermal procedure. Nanocomposite (NC) films of PVA/G filled with different amounts of Fe2O3 NPs were equipped using the solution casting technique. The surface morphology, structural, and optical properties were examined by scanning electron microscope (SEM), X‐ray diffraction (XRD), and ultraviolet‐visible‐near‐IR (UV‐Vis‐NIR) spectrophotometry techniques, respectively. SEM micrographs reveal the homogenous distribution of Fe2O3 NPs in the PVA/G matrix. The XRD analysis exhibits the formulation of the hematite phase of Fe2O3 NPs and the semi‐crystalline nature of PVA/G NC films. The UV‐Vis‐NIR data analysis shows that the optical properties of the PVA/G blend could be tailored via Fe2O3 NPs filling. Wemple–DiDomenico model is utilized to explore the dispersion parameters of the prepared NCs. A significant effect of Fe2O3 NPs filling is realized on the oscillator and dispersion energies, infinite refractive index, dielectric constant, average oscillator strength and the lattice dielectric constant of the NC films. PVA/G filled Fe2O3 NPs are suggested for different optical and storage applications.

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Section: Introductionmentioning

confidence: 99%

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Badawi

Alharthi

Althobaiti

et al. 2021

Vinyl Additive Technology

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“…This is similar to the cage effect that includes the free radical re-combination prior to taking part in reactions that encourage crosslinking [32,33]. Through crosslinking, the chains can be joined end to end; the increase of the polymeric chain length add also to the shift of Tm toward higher temperatures [23]. Fig.…”

Section: Differential Thermal Analysis (Dta)mentioning

confidence: 75%

“…This wide peak is due to the amorphous PANI as the amorphous PANI has two wide peaks at 2 = 20.4° and 24.8°. These peaks are owing to the periodicity parallel and perpendicular to PANI chains, correspondingly [23]. No peaks appeared for Co indicating the incorporation of Co in the NCP matrix.…”

Section: Ray Diffractionmentioning

confidence: 99%

Effect of gamma radiation on the structure and thermal properties of polyaniline-cobalt/polycarbonate nanocomposite

Samy

Hassan

El-Feky

et al. 2020

Al-Azhar Bulletin of Science

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The induced alterations in the structure and thermal properties of polyaniline-cobalt/polycarbonate, PANI-Co/PC, nanocomposite (NCP) owing to  irradiation have been investigated. The chemical composition and morphology of the prepared NCP samples were studied using scanning electron microscopy and energy dispersive spectrometry technique. Additionally, X-ray diffraction (XRD), FTIR spectroscopy, thermogravimetric analysis (TGA) and differential thermal analysis (DTA) were performed to investigate the resulted effect of  radiation. The  radiation with doses 50-350 kGy leads to the prevalence of intermolecular crosslinking which enhances the disordered phase and increases the bonds between the hydrogen of the PANI amine groups and carbonyl groups of PC. This is reflected in a rise in the degradation temperature values from 400 to 475 o C indicating an improvement in the thermostability of the NCP samples. Additionally, the melting temperature increased from 350 to 361 o C indicating a more compact structure of the NCP samples.

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“…Also, the presence of more negative charges creates novel interior bonds in the NC. Besides, the minute size of the Pd NPs decreases the atomic volume occupied by Pd and thus increases its density, leading to the enhancement of the absorbance [46,47].…”

Section: Absorption Coefficient Investigationmentioning

confidence: 99%

Structural, Thermal, and Optical Studies of Gamma Irradiated Polyvinyl Alcohol-, Lignosulfonate-, and Palladium Nanocomposite Film

et al. 2022

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Nanocomposite (NC) films of polyvinyl alcohol (PVA), lignosulfonate (Lg), and nanosized palladium (Pd) were synthesized by ex-situ casting method. Samples from the synthesized PVA-Lg/Pd NC films were irradiated with 5–100 kGy γ doses. The effect of γ doses on the structural, thermal, and optical characteristics of the NC films were studied using different characterization techniques. The results indicated that the γ irradiation improves the decomposition temperature from 227 to 239 °C, signifying an increase in the thermal stability of the NC films. This was accompanied by a reduction of the melting temperature due to the increase of the amorphous phase. This can be attributed to the dominance of crosslinking. On the other hand, the refractive index increased from 2.21 to 2.32 while increasing the γ dose up to 100 kGy. This was associated with a reduction of the optical bandgap from 3.49 to 3.30 eV, which could be attributed to the increase in the amorphous phase as a result of crosslinking. This indicates an enhancement of the spreading of the NPs inside the blend matrix due to γ irradiation. This results in a more compacted construction of the PVA-Lg/Pd NC films. Furthermore, we used the Commission Internationale de E’Claire (CIE) method to estimate the change in color among the irradiated NC films and the pristine film. The PVA-Lg/Pd NC attained a significant color difference value greater than five, meaning permanent color changes.

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Pani‐Ag/PVA nanocomposite: Gamma induced changes in the thermal and optical characteristics

Cited by 44 publications

References 32 publications

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Effect of gamma radiation on the structure and thermal properties of polyaniline-cobalt/polycarbonate nanocomposite

Structural, Thermal, and Optical Studies of Gamma Irradiated Polyvinyl Alcohol-, Lignosulfonate-, and Palladium Nanocomposite Film

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