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<p>The present work aims to develop flexible polymer blend nanocomposites with enhanced thermal, mechanical, and dielectric properties for potential energy storage applications. To achieve this, chlorinated polyethylene (CPE)/ethyl vinyl acetate (EVA) blend nanocomposites reinforced with nickel oxide (NiO) nanoparticles were prepared using a solvent-free two-roll mill mixing process. The successful formation of blend nanocomposites was confirmed through Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) analyses. FTIR analysis confirmed the incorporation of NiO through the appearance of new vibrational bands, while XRD revealed its characteristic crystalline reflections. UV–Vis spectra exhibited bathochromic shifts with increasing NiO loading, suggesting strong interfacial interactions. FE-SEM and HR-TEM images revealed uniform dispersion of nanoparticles at 5&#xa0;wt% loading, whereas higher contents led to agglomeration. Thermogravimetric analysis (TGA) demonstrated that incorporating NiO significantly improved the thermal stability of the blend nanocomposites. Extensive dielectric studies across wide temperature and frequency ranges exhibited significant enhancements in dielectric constant, electric modulus, and AC conductivity. The composite with 5&#xa0;wt% NiO exhibited the highest performance, with a dielectric constant of 87 and an AC conductivity of 3.38 × 10<sup>−6</sup> S/cm at 10<sup>6</sup>&#xa0;Hz. Mechanical testing showed remarkable improvements, with tensile strength, tear strength, and impact strength increasing by 74.1%, 116.85%, and 55.7%, respectively, accompanied by a hardness increase from 59 to 66. These findings demonstrate that EVA/CPE/NiO nanocomposites exhibit an optimal balance of structural integrity, thermal stability, and electrical performance, making them promising candidates for flexible energy storage devices.</p>

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Solvent-free processing of nickel oxide-reinforced chlorinated polyethylene/ ethyl vinyl acetate nanocomposites with improved energy storage capabilities

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Mananthala Shini,
  • Manammel Thankappan Ramesan

摘要

The present work aims to develop flexible polymer blend nanocomposites with enhanced thermal, mechanical, and dielectric properties for potential energy storage applications. To achieve this, chlorinated polyethylene (CPE)/ethyl vinyl acetate (EVA) blend nanocomposites reinforced with nickel oxide (NiO) nanoparticles were prepared using a solvent-free two-roll mill mixing process. The successful formation of blend nanocomposites was confirmed through Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) analyses. FTIR analysis confirmed the incorporation of NiO through the appearance of new vibrational bands, while XRD revealed its characteristic crystalline reflections. UV–Vis spectra exhibited bathochromic shifts with increasing NiO loading, suggesting strong interfacial interactions. FE-SEM and HR-TEM images revealed uniform dispersion of nanoparticles at 5 wt% loading, whereas higher contents led to agglomeration. Thermogravimetric analysis (TGA) demonstrated that incorporating NiO significantly improved the thermal stability of the blend nanocomposites. Extensive dielectric studies across wide temperature and frequency ranges exhibited significant enhancements in dielectric constant, electric modulus, and AC conductivity. The composite with 5 wt% NiO exhibited the highest performance, with a dielectric constant of 87 and an AC conductivity of 3.38 × 10−6 S/cm at 106 Hz. Mechanical testing showed remarkable improvements, with tensile strength, tear strength, and impact strength increasing by 74.1%, 116.85%, and 55.7%, respectively, accompanied by a hardness increase from 59 to 66. These findings demonstrate that EVA/CPE/NiO nanocomposites exhibit an optimal balance of structural integrity, thermal stability, and electrical performance, making them promising candidates for flexible energy storage devices.