In this study, different percentages of semiconducting zinc oxide nanoparticles (ZnONPs) are mixed with polyvinyl alcohol (PVA) to create flexible ZnO/PVA polymer nanocomposite films. The characteristics of the prepared films are investigated using differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The XRD pattern shows that the ZnO/PVA composite films were successfully synthesized; while the SEM images show that the ZnONPs are homogeneously dispersed in the PVA polymer chain. Moreover, the DSC indicates an improvement in the thermal stability behavior with increased of ZnONPs concentration. The electrical conductivity, dielectric properties, electric modulus behavior, and the energy density efficiency of the pristine PVA and ZnO/PVA composite films are determined using an LCR meter in the frequency range 10²–10⁶ Hz. The dielectric constant of the composite film increased from 0.185 for pristine PVA to 1.389 for 9%ZnO/PVA, and the conductivity is improved from 1.93 × 10−5 S/cm to 7.98 × 10−5 S/cm. This work would open the road for utilizing ZnO/PVA flexible nanocomposite films for wide range of applications such as batteries, super-capacitor and energy storage devices.

中文翻译：

---

ZnO纳米添加剂对PVA结构特性和介电性能的影响

在这项研究中，将不同百分比的半导体氧化锌纳米粒子 (ZnONP) 与聚乙烯醇 (PVA) 混合，形成柔性 ZnO/PVA 聚合物纳米复合薄膜。使用差示扫描量热法 (DSC)、扫描电子显微镜 (SEM) 和 X 射线衍射 (XRD) 技术研究制备的薄膜的特性。XRD图谱表明成功合成了ZnO/PVA复合薄膜；而SEM图像显示ZnONPs均匀分散在PVA聚合物链中。此外，DSC 表明随着 ZnONPs 浓度的增加，热稳定性行为得到改善。电导率、介电性能、电模量行为、² –10 ⁶赫兹。复合薄膜的介电常数从原始 PVA 的 0.185 增加到 9%ZnO/PVA 的 1.389，电导率从1.93 × 10-5S/cm 至7.98 × 10-5米/厘米。这项工作将为将 ZnO/PVA 柔性纳米复合薄膜用于电池、超级电容器和储能设备等广泛应用开辟道路。