Structural, Optical and Thermal Properties of (PEG/PAA:MnO2) Nano Composites

Abstract

In this work using manganese chloride and ammonia hydroxide in an aqueous solution as starting material to synthesize MnO2 nanoparticles by precipitation method The structural and optical and thermal properties of PEG PAA MnO2 Nano Composites films were investigated The PEG PAA polymeric blend films were doped with different ratios of MnO2 nanoparticles 0 1 3 and 5 using a casting method of 25 1 mm The obtained results demonstrated that the optical transmittance at the wavelengths between 200 1100 nm The optical properties of the films were affected by the MnO2 ratio The Energy gap of doped films decreased from 5 32 eV to 4 92 eV by increasing the doping MnO2 ratios The thermal conductivity coefficient K increases when adding MnO2 nanoparticles to the polymeric mixture PAA PEG.

Enhancement in Some Physical Properties of (PVP: CMC) Blend by the addition of MgO

“…A peak around 1600-1500 cm -1 , corresponds to the bending vibration of O-H on the surface of the MgO nanoparticles. A peak around 1400-1300 cm -1 [17,18], corresponds to the symmetric stretching vibration of Mg-O bonds in the MgO nanoparticles. In addition, the FTIR spectra of CMC: PVP doped with MgO nanoparticles may also show some overlapping peaks [19,20], such as the -OH stretching vibration of water molecules and the -CH stretching vibration of the CMC and PVP backbones [21].…”

Enhancements of Structural and Optical Properties of MgO: SnO2 Nanostructure Films

“…The optical absorption and transmission spectra of the MgO nanoparticles revealed a change in the band gap transition as the concentration of SnO 2 is increased, with a higher percentage of dopant, there is a small shift toward the longer wavelength region. The sharp increase in the spectra at the absorption edge demonstrates highly crystalline nanoparticles with few surface defects within the films [26,27] . Transmittance and reflectance were calculated separately, the transmittance spectra of the films are plotted as a function of the wavelength of incident light of all MgO:SnO 2 samples.…”