Enhancing the structural, optical, and dielectric properties of GNP-reinforced PVC/PMMA polymer nanocomposites for capacitive energy storage applications

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization Pub Date : 2026-01-02 Epub Date: 2025-08-21 DOI:10.1080/1023666X.2025.2547895

Abdullah F. Al Naim , A. A. Al-Muntaser

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Abstract

This study aims to enhance the dielectric and electrical properties of PVC/PMMA polymer blends by incorporating graphene nanoplatelets (GNPs) for potential use in energy storage devices. Nanocomposites were prepared via the solution casting method and characterized using various analytical techniques such as XRD, HR-TEM, FTIR, UV-Vis spectroscopy, dielectric measurements, AC conductivity, and impedance spectroscopy. X-ray diffraction (XRD) analysis revealed the emergence of a sharp crystalline peak at 2θ = 26.48°, corresponding to the (002) plane of GNPs, while the overall crystallinity of the polymer nanocomposites decreased due to disrupted polymer chain packing. HR-TEM imaging confirmed the layered morphology of GNPs, emphasizing 2D nanostructure with high surface area. FTIR spectroscopy indicated strong interfacial interactions, including π-π stacking and hydrogen bonding. UV-Vis. absorption spectra exhibited a redshift and increased intensity with higher GNP content, correlating with band gap narrowing due to charge carrier delocalization. Dielectric measurements demonstrated a remarkable increase in the dielectric constant (ε′), reaching 1.6 × 103 at 10 Hz for the 0.25 wt.% GNP composite, attributed to Maxwell-Wagner-Sillars polarization. AC conductivity analysis revealed a transition from insulating to conductive behavior with increasing GNP concentration, supported by impedance spectroscopy, which showed a reduction in bulk resistance. These findings highlight the potential of GNP-reinforced PVC/PMMA composites for capacitive energy storage applications.

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提高gnp增强聚氯乙烯/PMMA聚合物纳米复合材料的结构、光学和介电性能，用于电容储能应用

本研究旨在通过加入石墨烯纳米片（GNPs）来提高PVC/PMMA聚合物共混物的介电性能和电性能，以用于储能设备。采用溶液浇铸法制备了纳米复合材料，并利用XRD、HR-TEM、FTIR、UV-Vis光谱、介电测量、交流电导率和阻抗谱等分析技术对其进行了表征。x射线衍射（XRD）分析表明，在2θ = 26.48°处出现了一个尖锐的结晶峰，对应于GNPs的（002）平面，而聚合物链的排列被打乱导致聚合物纳米复合材料的整体结晶度下降。HR-TEM成像证实了GNPs的层状形貌，强调具有高表面积的二维纳米结构。FTIR光谱分析表明，两者之间存在很强的界面相互作用，包括π-π堆积和氢键。紫外可见。随着GNP含量的增加，吸收光谱表现出红移和强度增加，这与电荷载流子离域引起的带隙缩小有关。介电测量表明介电常数（ε′）显著增加，在10 Hz时达到1.6 × 103。% GNP综合指数，归因于麦克斯韦-瓦格纳-西拉极化。交流电导率分析表明，随着GNP浓度的增加，材料的绝缘行为向导电行为转变，阻抗谱分析表明，材料的体电阻减小。这些发现突出了gnp增强PVC/PMMA复合材料在电容储能应用中的潜力。

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来源期刊

International Journal of Polymer Analysis and Characterization 化学-高分子科学

CiteScore

3.50

自引率

5.30%

发文量

审稿时长

1.6 months

期刊介绍： The scope of the journal is to publish original contributions and reviews on studies, methodologies, instrumentation, and applications involving the analysis and characterization of polymers and polymeric-based materials, including synthetic polymers, blends, composites, fibers, coatings, supramolecular structures, polysaccharides, and biopolymers. The Journal will accept papers and review articles on the following topics and research areas involving fundamental and applied studies of polymer analysis and characterization: Characterization and analysis of new and existing polymers and polymeric-based materials. Design and evaluation of analytical instrumentation and physical testing equipment. Determination of molecular weight, size, conformation, branching, cross-linking, chemical structure, and sequence distribution. Using separation, spectroscopic, and scattering techniques. Surface characterization of polymeric materials. Measurement of solution and bulk properties and behavior of polymers. Studies involving structure-property-processing relationships, and polymer aging. Analysis of oligomeric materials. Analysis of polymer additives and decomposition products.