Nanofiller concentration dependent, tunable-type structural, dielectric, thermo-mechanical, and optical properties of the polymer nanocomposites (PNCs) have established them as technologically smart multifunctional materials for advances in stretchable and flexible-type organoelectronic, optoelectronic, and energy harvesting/storage devices. In this work, organic-inorganic hybrid PNC films comprising poly(vinyl alcohol) (PVA) and poly(ethylene oxide) (PEO) blend as host matrix (PVA–PEO; 50–50 wt%) dispersed with varying concentration of tin oxide (SnO₂) nanoparticles up to 5 wt% have been prepared by the solution-cast method. The influence of SnO₂ loading on the percent crystallinity of the host matrix and the structural parameters of the PEO crystallites has been examined by the X-ray diffraction (XRD) measurements of the PNC films. The results reveal that the percent crystallinity of the semicrystalline (PVA–PEO) matrix gradually enhanced, whereas the interlayer spacing, crystallite size, and interchain separation of the PEO crystallites varied anomalously with the increase of SnO₂ concentration in the PNC films. The complex dielectric permittivity, alternating current (ac) electrical conductivity, and electric modulus dispersion over the broad frequency range (20 Hz–1 MHz) of these (PVA–PEO)/SnO₂ films has been characterized by employing the dielectric relaxation spectroscopy (DRS). It has been observed that 1 wt% SnO₂ nanoinclusion abruptly reduced the interfacial, dipole polarizations, and also electrical conduction of the host matrix, whereas considerably enhanced hindrance to the PEO chain segmental motion studied at 30 °C. The temperature dependent study (30–60 °C) of the representative PNC film of 3 wt% nanofiller reveals its thermally activated non-linear dielectric polarization at fixed frequency and also Arrhenius behaviour of the dielectric relaxation processes of significantly low activation energy (≃ 0.14 eV). The structural, dielectric, and electrical properties of the (PVA–PEO)/SnO₂ films have been critically analyzed for their suitability as controllable low dielectric permittivity polymer nanodielectric (PNDs) materials for biodegradable electronic devices.

中文翻译：

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SnO2纳米夹杂物对（PVA–PEO）/ SnO2纳米复合材料的结构和介电性能的影响

聚合物纳米复合材料（PNC）的浓度依赖于纳米填料，具有可调型的结构，介电，热机械和光学特性，已将其确立为技术上智能的多功能材料，可用于可拉伸和柔性型有机电子，光电以及能量收集/存储设备。在这项工作中，包含聚乙烯醇（PVA）和聚环氧乙烷（PEO）的有机-无机杂化PNC膜作为主体基质（PVA–PEO； 50–50 wt％）掺入了不同浓度的氧化锡通过溶液流延法已经制备了高达5wt％的（SnO ₂）纳米颗粒。SnO ₂的影响通过PNC膜的X射线衍射（XRD）测量，已经研究了基质基质的百分比结晶度和PEO晶体结构参数的负载量。结果表明，半结晶（PVA-PEO）基体的结晶度逐渐提高，而随着PNC膜中SnO ₂浓度的增加，PEO结晶的层间距，结晶尺寸和链间分离发生异常变化。这些（PVA-PEO）/ SnO ₂薄膜的宽介电常数，交流电（ac）电导率和模量色散在很宽的频率范围（20 Hz-1 MHz）中已通过采用介电弛豫光谱法进行了表征（ DRS）。已经观察到1重量％的SnO₂纳米夹杂物突然减少了主体基质的界面，偶极极化以及电传导，而在30°C下对PEO链段运动的阻碍显着增加。对3 wt％纳米填料的代表性PNC膜的温度依赖性研究（30–60°C）显示其在固定频率下的热激活非线性介电极化，以及激活能量极低的介电弛豫过程的Arrhenius行为（≃0.14） eV）。（PVA-PEO）/ SnO ₂膜的结构，介电和电性能已被严格分析，以适合作为可控制的低介电常数聚合物纳米电介质（PNDs）用于可生物降解电子设备。