Effect of encapsulated multi-walled carbon nanotubes on the thermal, electrical, and dielectric properties of PEO/SA nanocomposites

المؤلفون

  • Maha Aiiad Alenizi Department of Physics, Faculty of Sciences-Arar, Northern Border University, P.O. Box 1321, Arar, 91431, Saudi Arabia المؤلف
  • A. M. Alshehari Department of Physics, Faculty of Science, Mansoura University, Mansoura, Egypt المؤلف
  • A. H. Oraby Department of Physics, Faculty of Science, Mansoura University, Mansoura, Egypt المؤلف
  • E. Salim Department of Physics, Faculty of Science, Mansoura University, Mansoura, Egypt Faculty of Health Science Technology, Mansoura National University, Gamsa, Mansoura, Egypt المؤلف
  • E. M. Abdelrazek Department of Physics, Faculty of Sciences-Arar, Northern Border University, P.O. Box 1321, Arar, 91431, Saudi Arabia المؤلف
  • G. M. Asnag الجامعة الإماراتية الدولية image/svg+xml المؤلف
  • M. A. Morsi Department of Physics, College of Science, Taibah University, Madinah, Saudi Arabia المؤلف

DOI:

https://doi.org/10.1007/s10965-025-04671-y

الكلمات المفتاحية:

PEO/SA blend; MWCNTs; Thermal stability; Dielectric performance; Loss tangent; Flexible energy storage

الملخص

Polymer nanocomposites combining dielectric properties with controlled conductivity are critical for advanced energy storage applications. This study investigates polyethylene oxide/sodium alginate (PEO/SA) blends reinforced with multi-walled carbon nanotubes (MWCNTs). PEO/SA/MWCNTs nanocomposites were fabricated using solution casting, with TEM confirming uniform dispersion of MWCNTs (diameters: 13.30–22.16 nm) without aggregation. DSC analysis revealed enhanced thermal stability, demonstrated by increased glass transition (Tg ↑ 10%), melting (Tm ↑ 12%), and decomposition temperatures, attributed to strong interfacial interactions. Electrical properties showed a significant improvement in conductivity: threefold (to 2.81 × 10⁻⁹ S.cm− 1 at 100 Hz) at a concentration of 0.40 wt% MWCNTs, with further improvement at elevated temperatures. Dielectric studies demonstrated exceptional permittivity (ε′ = 1.66 × 103at a concentration of 0.40 wt% MWCNTs, a 447% increase compared to the pure blend) and frequency-dependent behavior, with both ε′ and ε″ values decreasing steadily before stabilizing above 1 MHz. The loss tangent (Tanδ) demonstrated dual dependency: increasing with MWCNTs concentration/temperature but decreasing with frequency due to reduced interfacial polarization. These results establish PEO/SA/MWCNTs nanocomposites as promising next-generation dielectric materials for flexible energy storage and optoelectronic systems.

السيرة الشخصية للمؤلف

  • G. M. Asnag، الجامعة الإماراتية الدولية
    G. M. Asnag
    • Department of Biomedical Engineering, College of Engineering and Information Technology, Emirates International University, Sana’a, 16881, Yemen
    • Department of Optometry and Visual Science, College of Medical Sciences, Al-Razi University, Sana’a, Yemen

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التنزيلات

منشور

2025-11-17

إصدار

2025

القسم

Articles

الفئات

الرخصة

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كيفية الاقتباس

Alenizi, M. A., Alshehari, A. M., Oraby, A. H., Salim, E., Abdelrazek, E. M., Asnag, G. M., & Morsi, M. A. (2025). Effect of encapsulated multi-walled carbon nanotubes on the thermal, electrical, and dielectric properties of PEO/SA nanocomposites. المستودع الرقمي الجامعة الإماراتية الدولية, 1(1). https://doi.org/10.1007/s10965-025-04671-y

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