Investigation of Linear Optical Parameters and Dielectric Properties of Polyvinyl Alcohol/ZnO Nanocomposite Films

Abstract

The scientific community maintains considerable interest in polyvinyl alcohol (PVA) based on metal oxide nanocomposites due to its ability to combine both polymers and dopants with their properties. [1-15] These polymers have many applications in medical and engineering technology because of their mechanical, electrical, and optical properties. [16,17] ZnO-based polymeric nanocomposite materials have attracted scientific attention because of their transparency, high electron mobility, wide bandgap (3.2 eV, at 300 K [18,19]), and electrical properties. The insertion of ZnO nanoparticles into PVA matrices, in general, may significantly change their electric, mechanical, and optical characteristics. [1,7,8,15] PVA is readily water-soluble, and as such has many uses in the fields of polymer processing, pharmacy, and biomedicine. [20-23] Shanshool et al. [7] have studied the optical properties of various composites that use ZnO nanoparticles as a filler material in different polymer matrices, such as poly(methyl methacrylate) (PMMA), poly(vinylidene fluoride) (PVDF), PVA, and polystyrene (PS). ZnO nanoparticles have been found to have an effect on the bandgap of each polymer matrix, depending on the polymer's nature. The structural, optical, and dielectric properties of ZnOreinforced poly(ethylene oxide) (PEO) blended with poly(vinyl pyrrolidone) (PVP) have been previously studied by Choudhary. [13] It was noted that the enhanced optical properties of obtained nanocomposite films confirm the suitability of these materials for use in optical sensors. Moreover, Selvi et al. [1] synthesized ZnO nanoparticles with the co-precipitation method and reinforced a PVA matrix to investigate the optical and electrical properties of the resultant polymer composite films. However, the linear optical parameters, such as the refractive

PVA/Gd2O3@Zno Nanocomposite Films as New Uv-Blockers: Structure and Optical Revelations

“…Optical conductivity (σopt) is a characteristic that indicates how electromagnetic waves affect the flow of charge carriers in a substance. This can be accessed from the following equation [38][39][40] σopt…”

“…The extinction coefficient (K) indicates how much energy is lost as an electromagnetic wave travels through a material. It can be calculated using the equation below [39,40].…”

A Systematic Review on the Dielectric Response of Polyvinyl alcohol - Zinc Oxide Nanocomposites Films

“…Journal of Physics: Conference Series 2267 (2022) 012046 constant values of 10 4 which makes the material potential candidate for flexible electronics applications. Tarek S. Soliman et al [25] have studied the dielectric properties of the nanocomposites for the frequency range of 100 Hz-5 kHz and a temperature range of 310 K to 360 K. The permittivity of the polymer films was reported to increases as the temperature rises. In the optical transmittance study, the minimum transmittance peak at 375 nm was attributed to the absorption due to ZnO nanoparticles.…”

“…The extent of the effect depends on the weight percent (wt%) of ZnO in the polymer matrix, the measurement temperature and frequency windows. There are several reports available in the literature on the dielectric properties of this PVA-ZnO nanocomposites at different temperatures and frequencies [18][19][20][21][22][23][24][25][26][27]. In this work we have attempted to consolidate all these works and to provide a systematic roadmap towards performance improvement and optimum operating conditions.…”

Study of the optical properties and frequency-dependent electrical modulus spectrum to the analysis of electric relaxation and conductivity effect in zinc oxide nanoparticles

“…But they have not included details relaxation mechanism and largescale temperature variation along with high temperature region. Soliman et al studied optical properties and dielectric response for Polyvinyl Alcohol/ZnO Nanocomposite systems with two different frequencies 100 Hz and 10 kHz [21]. Recently, dielectric properties of different metal doped ZnO NPs and polymer-ZnO NPs composites are studied by different researchers [22][23][24][25][26].…”