Poly(vinyl alcohol) (PVA) nanocomposites incorporated with ZnO nanofiller were prepared and examined to study the influence of nanofiller on their properties. All the prepared samples were analyzed using FTIR and XRD. The observation of M–O stretching peak (at 526 cm⁻¹) in the samples indicated the interaction of ZnO with PVA matrix. The XRD patterns of PVA nanocomposites confirmed the presence of ZnO nanofiller. The uniform dispersion of ZnO nanofiller as well as the interaction of nanofiller with the PVA matrix was also observed in SEM study. The size of the ZnO nanoparticles (NPs) was estimated to be less than 35 nm from the TEM micrograph. The light absorption and transmittance behaviors of the PVA nanocomposites were examined by analyzing the UV–visible spectra. The prepared PVA nanocomposite films exhibited high absorption in the UV region. The band gap of PVA was decreased after incorporating the ZnO NPs. The thermal property and non-isothermal degradation behavior of the polymer nanocomposites were assessed using a TGA instrument. The energy of activation associated with the thermal decomposition behavior of the polymer composites was determined using the kinetic models. The DC electrical conductivity, mechanical properties, and thermal stability of the nanocomposite films were enhanced by the addition of ZnO NPs as compared with the pure PVA.

中文翻译：

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聚乙烯醇-ZnO纳米复合材料的光学，电学，机械和热学性质以及非等温分解行为

制备并检查了掺有ZnO纳米填料的聚乙烯醇（PVA）纳米复合材料，以研究纳米填料对其性能的影响。使用FTIR和XRD分析所有制备的样品。观察到M–O拉伸峰（在526 cm ^-1处）表明样品中ZnO与PVA基质的相互作用。PVA纳米复合材料的XRD图谱证实了ZnO纳米填料的存在。SEM研究还观察到ZnO纳米填料的均匀分散以及纳米填料与PVA基质的相互作用。根据TEM显微照片，ZnO纳米颗粒（NPs）的尺寸估计小于35 nm。通过分析紫外可见光谱检查了PVA纳米复合材料的光吸收和透射行为。制备的PVA纳米复合膜在UV区显示出高吸收。掺入ZnO NP后，PVA的带隙减小。使用TGA仪器评估聚合物纳米复合材料的热性质和非等温降解行为。使用动力学模型确定与聚合物复合材料的热分解行为相关的活化能。与纯PVA相比，通过添加ZnO NP增强了纳米复合膜的直流电导率，机械性能和热稳定性。