Optical Study on PVA/PEG Blend Doped with Nano-Silica

Abstract

Transparent films of polyvinyl alcohol/polyethylene glycol (PVA/PEG) blend loaded with different nano-silica (SiO 2 ) content were prepared by using solution casting. The effect of SiO 2 nanoparticle loading on the optical properties of selected PVA/PEG blend ratio is studied in the spectral region 200-700 nm. The present study monitors the changes in the optical dispersion parameters such as band tail width, extinction coefficient, refractive index, and optical dielectric constant calculated as a function of nano-silica content. The results revealed that the obtained optical parameters were strongly affected by the SiO 2 content in the blend films. Also, Cauchy model is used to fit the wavelength dependence of the refractive index of the composites. In addition, thermogravimetric analysis indicates the increase of thermal stability of the composites with respect to pure blend. The Coats and Redfern model is used to calculate activation energies for decomposition.

Dynamic and Relaxation of PEG polymer Chain Segment for Phase Change Materials (PCMs)

“…The diffraction properties of the silica xerogel made from beach sand extraction and its composites demonstrate an amorphous structure with an increase in the background diffraction at 2-theta between 20 and 29q. These findings have been verified based on the findings of earlier investigations on silica xerogel [16][17][18][19], these findings have been verified. The highest peaks of PEG's semicrystalline structure, which arise at two theta and correspond to 19.09 and 23.19q, respectively, are numerous.…”

PMMA@TiO2@SiO2 Composite Microsphere with Sufficiently High Light Transmittance and Haze for Promising Application in Optical Diffusion Film

“…In total, six kinds of diffusion particles were prepared, primarily including nanosilica dioxide, nanotitanium dioxide, PMMA microspheres, PMMA@SiO 2 (P@S) composite microspheres, PMMA@TiO 2 (P@T) composite microspheres, and PMMA@TiO 2 @SiO 2 (P@T@S) composite microspheres. Because the nanosilicon dioxide and nanotitanium dioxide themselves also have light scattering effects, they can also be considered as diffusion particles and compared with PMMA microspheres and composite microspheres. , The nanoparticles were prepared by a precursor hydrolysis method, with the preparation process of PMMA microspheres and PMMA composite microspheres shown in Figure . First, PMMA microspheres were prepared by emulsion polymerization.…”

High performance of the sodium‐ion conducting flexible polymer blend composite electrolytes for electrochemical double‐layer supercapacitor applications

“…The property of the low‐molecular weight of the PEG provides the quality of high conductivity for lithium ions, but its low mechanical strength and shorter range of potential windows could not be improved. The researchers are focusing to improve in the mechanical strength of the PEG polymer via adopting various strategies such as the incorporation of different chemicals (like plasticizers, ionic liquid, and inorganic filler) plus physical components into its matrix 28 …”

“…The researchers are focusing to improve in the mechanical strength of the PEG polymer via adopting various strategies such as the incorporation of different chemicals (like plasticizers, ionic liquid, and inorganic filler) plus physical components into its matrix. 28 The blend formation of PVA along PEG polymers has been reported in the literature in detail for various applications. In the composition of PVA and PEG, the hydroxyl group in the PVA chain forms a hydrogen bond along with the ether compound that exists in the PEG chain, thus resulting in the blend formation of the PVA and PEG.…”