Improvement of the optical characteristics of PVA/PVP blend with different concentrations of SnS₂/Fe

Abstract

Polyvinyl alcohol (PVA)/polyvinylpyrrolidone (PVP; weight 7:3) polymer blends doped with different ratios (1 wt%, 3 wt%, 5 wt%, and 10 wt%) from nano SnS 2 /Fe are developed using casting and thermolysis procedures. Rietveld analysis showed that Fe is incorporated into the SnS 2 lattice forming a single hexagonal phase with an average crystallite size of 6 nm along [00l] direction and 15 nm along [h00] direction. X-ray diffraction together with Fourier transform infrared data is used to examine the homogeneity distribution of the nanofiller over the blend matrix. The effect of doping on the absorbance, transmittance, extinction coefficient, refractive index, direct and indirect optical band gaps, and other dispersion parameters of the blend is studied in detail.The nature of electronic transitions in the different blends was determined using Tauc's relation and the dielectric loss parameter. As the weight concentrations of SnS 2 /Fe dopants increased, the nonlinear optical parameters are increased relative to the undoped PVA/PVP polymer blend. The influence of the different excitation wavelengths and the amount of nanofillers on the fluorescence spectra from different blends are also investigated.

Noval properties of PVA/PVP polymer blend doped by nano-ZnO/M (M = Co, Cu, Mn, V)

“…Additionally, the (eV/cm) 2 0.7PVA/0.3PVP/ZnO/Mn 4.84 eV Fig. 4 Plots of (αhν) 2 vs. the photon energy (hν) for undoped and doped 70%PVA/30%PVP blends with nano ZnO and ZnO/Co, Cu, Mn refractive index of PVA/PVP was improved as it doped with the nanofiller reached its highest value in the visible range as it is doped with nano-ZnO/Mn. The enhancement in the refractive index is owing to the increase in the density of the PVA/PVP after the insertion of the nanofiller.…”

“…Polymer-based nanocomposites attracted much attention in recent years, owing to their good properties and potential applications in optoelectronic fields [1][2][3]. Moreover, mixing two or more polymers to form a blended polymer opens new fields of applications, due to the new properties that emerged [4,5]. PVA has been investigated intensively owing to its good film producing and physical characteristics, high hydrophilicity, processability and good chemical resistance [6,7].…”

Use of niobium oxide nanoparticles as nanofillers in PVP/PVA blends to enhance UV–visible absorption, opto‐linear, and nonlinear optical properties

“…[35] This provides valuable information regarding the nature of the optically forbidden gap energy for the investigated polymer films used in various potential applications. The absorption coefficient α can be calculated using the Beer-Lambert law [36] as follows:…”

Peanut Shells Cellulose Based Biodegradable Nanocomposites with Polyvinyl Pyrrolidone (PVP) and Polyvinyl Alcohol (PVA)

“…[ 17,18 ] The semicrystallinity of PVA showed important features rather than amorphous one. [ 14,19 ] Furthermore, the good compatibility of PVP with polyvinyl alcohol (PVA) also enhances the film‐forming properties of the PVP/PVA blended polymers. [ 20 ]…”

“…[17,18] The semicrystallinity of PVA showed important features rather than amorphous one. [14,19] Furthermore, the good compatibility of PVP with polyvinyl alcohol (PVA) also enhances the film-forming properties of the PVP/PVA blended polymers. [20] The objective of this study was to extract cellulose from peanut shells (Arachis hypogaea) and develop cellulose based low-cost biodegradable nanocomposite of PVP/PVA loaded with ZnO nanoparticles with higher rate of degradation by exploring their physicochemical properties.…”