Synthesis of polymeric blends and nanocomposites of tuned properties gained increasing attention worldwide. In the present report, semicrystalline PVA/PEO blend films loaded with clay nanoparticles (Nps), at doping ratios in the range 3–12 wt%, were prepared and characterized by various techniques. XRD, SEM, and FTIR were used for probing the semicrystalline nature, morphology, and microstructure of the blend and complexation between its constituents. UV–vis-IR spectroscopy was performed to study the optical properties and optical constants of the prepared nanocomposites. Moreover, the dielectric properties were studied in the frequency range 0.1 Hz to 20 MHz and at different temperatures. Clay Nps incorporation decreased the blend crystallinity and affect its surface morphology without changing the blend structure. Strong interaction and complexation between the films’ constituents are noted through the change in XRD peaks position and FTIR band intensity. The values of optical transmittance and absorption index of the films as well as the bandgap (E _g), refractive index (n), and optical dispersion parameters depend mainly on the clay Nps doped ratio. The direct E _g decreased from 4.5 to 3.9 eV and n increased from 3.28 to 4.78. The dielectric constant, dielectric loss tangent, dielectric moduli (M′, M″), and ac conductivity were improved with the clay Nps content and also influenced by the temperature. The nature of the relaxation peaks in tan (δ) and M″ indicate the deviation of the conduction process from the ideal Debye type behavior. Increasing the semiconducting nature and the value of ac conductivity encourage the utilization of these nanocomposites in various electric and optoelectric applications.

合成聚合物共混物和具有调谐特性的纳米复合材料在世界范围内受到越来越多的关注。在本报告中，半结晶 PVA/PEO 共混薄膜负载粘土纳米颗粒 (Nps)，掺杂比例在 3-12 wt% 范围内，通过各种技术制备和表征。XRD、SEM 和 FTIR 用于探测混合物的半结晶性质、形态和微观结构以及其成分之间的络合。进行紫外-可见-红外光谱研究制备的纳米复合材料的光学性质和光学常数。此外，还研究了 0.1 Hz 至 20 MHz 频率范围内和不同温度下的介电特性。粘土 Nps 的掺入降低了共混物结晶度并影响其表面形态而不改变共混物结构。通过 XRD 峰位置和 FTIR 波段强度的变化注意到薄膜成分之间的强相互作用和络合。薄膜的透光率和吸收指数以及带隙值（E _g )、折射率 ( n ) 和光色散参数主要取决于粘土 Nps 掺杂比。直接E _g从 4.5 eV 减少到 3.9 eV，n从 3.28 增加到 4.78。介电常数、介电损耗角正切、介电模量（M′、M″）和交流电导率随粘土 Nps 含量的增加而提高，也受温度的影响。tan ( δ ) 和M″ 中弛豫峰的性质表示传导过程与理想德拜型行为的偏差。增加半导体性质和交流电导率的值促进了这些纳米复合材料在各种电和光电应用中的利用。