ABSTRACT

Polymer nanocomposites (PNCs) of tailorable dielectric and optical properties are categorized as polymer nanodielectrics (PNDs) for their uses in developing flexible and stretchable-type advanced organoelectronic devices. This paper reports the detailed structural, dielectric, and optical properties of multiphase PEO/PMMA/ZnO nanocomposites comprising poly(ethylene oxide) (PEO) blended with poly(methyl methacrylate) (PMMA) in equal composition as a host matrix and zinc oxide (ZnO) nanoparticles as filler with varying concentrations (1–5 wt%). X-ray diffraction (XRD) results confirmed the successful formation of these nanocomposites with a considerable decrease in percent crystallinity of the polymer matrix which was attributed to alterations in crystalline parameters of the PEO resulting from multiphase polymer–nanoparticle interfaces and the electrostatic interactions. The dielectric relaxation spectroscopy (DRS) of 20 Hz to 1 MHz range confirmed that the confinement of homogenously distributed ZnO nanoparticles in the PEO/PMMA structures caused a significant lowering in the dielectric permittivity governed by interfacial polarization and the dipolar ordering with some alteration in conductivity and chain segmental relaxation processes which reveal suitability of these hybrid nanocomposites as low permittivity PNDs for microelectronics. The UV-Vis absorbance and energy bandgap results were found filler concentration-dependent which explores these composites as promising materials for optoelectronic device applications.

摘要

具有可定制介电和光学特性的聚合物纳米复合材料 (PNC) 被归类为聚合物纳米电介质 (PND)，因为它们用于开发柔性和可拉伸类型的先进有机电子器件。本文报告了多相 PEO/PMMA/ZnO 纳米复合材料的详细结构、介电和光学性能，该复合材料包含与聚（甲基丙烯酸甲酯）（PMMA）混合的聚（环氧乙烷）（PEO）与作为主体基质和氧化锌等成分的聚（环氧乙烷）（PEO）。 ZnO）纳米颗粒作为不同浓度（1-5wt%）的填料。X 射线衍射 (XRD) 结果证实了这些纳米复合材料的成功形成，聚合物基质的结晶度百分比显着降低，这归因于多相聚合物-纳米颗粒界面和静电相互作用导致 PEO 结晶参数的改变。20 Hz 至 1 MHz 范围内的介电弛豫光谱 (DRS) 证实，均匀分布的 ZnO 纳米粒子在 PEO/PMMA 结构中的限制导致介电常数显着降低，介电常数受界面极化和偶极排序控制，电导率有所改变链段弛豫过程揭示了这些混合纳米复合材料作为微电子低介电常数 PND 的适用性。