Patsidis Anastasios C, Dimitrakellis Panagiotis, Gogolides Evangelos, Psarras Georgios C
Smart Materials & Nanodielectrics Laboratory, Department of Materials Science, School of Natural Sciences, University of Patras, 26504 Patras, Greece.
Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Aghia Paraskevi, 15341 Attiki, Greece.
Materials (Basel). 2024 Aug 15;17(16):4063. doi: 10.3390/ma17164063.
In this work, the effect of etching the surface of polymer matrix nanocomposites with atmospheric pressure plasma targeting to achieve enhanced dielectric properties was investigated. Polymer nanocomposites, with varying reinforcing phase content, were modified by atmospheric-pressure plasma resulting in an increase in the surface filler's concentration. Polymethyl methacrylate (PMMA) matrix nanocomposites reinforced with zinc oxide (ZnO) nanoparticles were prepared and dielectrically studied as a function of the nanoparticle content and the plasma modified surfaces. The electrical response of the composite systems was studied by means of Broadband Dielectric Spectroscopy (BDS) over a wide range of temperatures and frequencies. The dielectric permittivity increased with the embedded phase content and with plasma surface treatment. Energy density followed the same trend as dielectric permittivity, and the plasma-treated nanocomposite with the higher ZnO content exhibited approximately 27% higher energy density compared to the unreinforced matrix.
在这项工作中，研究了用大气压等离子体蚀刻聚合物基纳米复合材料表面以实现增强介电性能的效果。通过大气压等离子体对具有不同增强相含量的聚合物纳米复合材料进行改性，导致表面填料浓度增加。制备了用氧化锌（ZnO）纳米颗粒增强的聚甲基丙烯酸甲酯（PMMA）基纳米复合材料，并作为纳米颗粒含量和等离子体改性表面的函数进行了介电研究。通过宽带介电谱（BDS）在很宽的温度和频率范围内研究了复合系统的电响应。介电常数随嵌入相含量和等离子体表面处理而增加。能量密度遵循与介电常数相同的趋势，与未增强的基体相比，具有较高ZnO含量的经等离子体处理的纳米复合材料的能量密度高出约27%。
