深入了解聚苯乙烯-氧化锌纳米复合材料的介电性能和热性能:多元表征方法

IF 3.6 4区 材料科学 Q2 MATERIALS SCIENCE, COMPOSITES
A Rahimli, A Huseynova, N Musayeva, R Alekperov, M Jafarov
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引用次数: 0

摘要

本研究采用溶液混合法和热压法相结合的方法,成功地将氧化锌纳米颗粒(ZnO)掺入聚苯乙烯(PS)中,得到了一系列 PS/ZnO 纳米复合材料。利用 X 射线衍射 (XRD) 技术、扫描电子显微镜 (SEM)、阻抗光谱 (IS)、拉曼光谱 (RS)、热重分析 (TG) 和差示扫描量热法 (DSC) 进行的表征揭示了不同的特征。纳米复合材料的 XRD 分析表明,在不同的散射角(2θ = 8°-11° 和 20°-22°)下,既有弱强度峰,也有高强度峰,表明纳米颗粒大小不一的无定形相 PS 相。事实证明,在所研究的物质(PS/10%ZnO)中,添加较多的 ZnO 会导致弱强度最大值的消失,这是由于形成了微晶区域,从而形成了高强度的尖锐最大值。据测定,氧化锌浓度增加到 5% 时,聚苯乙烯的介电渗透率(ε)和极化能力都会提高。据认为,根据氧化锌浓度的不同,介电渗透率和极化能力的提高归因于氧化锌纳米颗粒与基体之间的边界上具有不同电荷密度的相,这促进了额外的极化,并有助于整体介电常数的提高。随着氧化锌含量的增加,热重(TG)曲线呈阶梯状,这表明界面边界的形成是显而易见的。在 PS 中引入氧化锌纳米粒子会形成新的相,改变拉曼散射光谱中 376 cm-1 和 485 cm-1 频率处的峰值强度和位置,部分峰值会向更高的频率移动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Insights into dielectric and thermal properties of polystyrene-zinc oxide nanocomposites: A multifaceted characterization approach
In this study, zinc oxide nanoparticles (ZnO) were successfully incorporated into polystyrene (PS) using a combination of solution mixing and hot-pressing methods, yielding a range of PS/ZnO nanocomposites. Characterization using X-ray diffraction (XRD) techniques, scanning electron microscopy (SEM), impedance spectroscopy (IS), Raman spectroscopy (RS), thermogravimetric analysis (TG) and differential scanning calorimetry (DSC) revealed distinct features. XRD analysis of nanocomposites showed both weak and high-intensity peaks at different scattering angles (2θ = 8°–11° and 20°–22°), indicating amorphous phases PS phases with varying sizes of nanoparticles. It has been proved that the addition of higher amounts of ZnO leads to the disappearance of the maximum of weak intensity in the studied substance (PS/10%ZnO), which is due to the formation of microcrystalline regions that lead to the formation of sharp maxima with high intensity. It was determined that the increase in the concentration of ZnO up tp 5 % volume content enhances the dielectric permeability (ε) and polarization capacity of polystyrene. It is believed that, depending on the ZnO concentration, the increased dielectric permeability and polarizability are attributed to phases with different charge densities at the boundaries between the ZnO nanoparticles and the matrix, which promotes additional polarization and contributes to the overall enhanced permittivity. This formation of interfacial boundaries is evident from the stepwise shape of the thermogravimetric (TG) curve with increasing ZnO content. The introduction of ZnO nanoparticles into PS results in the formation of new phases, altering the intensity and position of peaks observed at frequencies of 376 cm⁻1 and 485 cm⁻1 in the Raman scattering spectrum, partially shifting towards higher frequencies.
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来源期刊
Journal of Thermoplastic Composite Materials
Journal of Thermoplastic Composite Materials 工程技术-材料科学:复合
CiteScore
8.00
自引率
18.20%
发文量
104
审稿时长
5.9 months
期刊介绍: The Journal of Thermoplastic Composite Materials is a fully peer-reviewed international journal that publishes original research and review articles on polymers, nanocomposites, and particulate-, discontinuous-, and continuous-fiber-reinforced materials in the areas of processing, materials science, mechanics, durability, design, non destructive evaluation and manufacturing science. This journal is a member of the Committee on Publication Ethics (COPE).
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