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<p>In recent years, interest in nanocomposite thin films has grown due to the combination of the polymer matrix’s nature and the advantageous physicochemical properties of the nanoparticles. In this regard, polyvinyl alcohol has gained significant importance due to its ease of handling, high solubility, and low toxicity. This work presents the improvement of the thermal diffusivity of polyvinyl alcohol thin films through the physical incorporation of nanofillers, specifically previously synthesized silver nanorods. Characterization using ultraviolet-visible spectroscopy and thermal lensing suggests the high transparency and low diffusivity of the unfilled films. Conversely, the incorporation of silver nanostructures decreased the band gap, improved the absorption coefficient, and consequently, the thermal diffusivity, reaching values of up to 19.32 ± 0.65&#xa0;cm²/s. Based on these results, the phenomenon of this improvement in optical and thermal properties is discussed, suggesting transitions involving the photon-electron-phonon lattice of the advanced nanocomposite.</p>

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A new nanocomposite based on polyvinyl alcohol thin films: improvement of optical and thermal properties

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • Héctor Santos Luna-Zendejas,
  • Rubén Gutiérrez-Fuentes,
  • Arturo Estrada-Torres,
  • José Luis Jiménez-Pérez,
  • Angel Netzahual-Lopantzi

摘要

In recent years, interest in nanocomposite thin films has grown due to the combination of the polymer matrix’s nature and the advantageous physicochemical properties of the nanoparticles. In this regard, polyvinyl alcohol has gained significant importance due to its ease of handling, high solubility, and low toxicity. This work presents the improvement of the thermal diffusivity of polyvinyl alcohol thin films through the physical incorporation of nanofillers, specifically previously synthesized silver nanorods. Characterization using ultraviolet-visible spectroscopy and thermal lensing suggests the high transparency and low diffusivity of the unfilled films. Conversely, the incorporation of silver nanostructures decreased the band gap, improved the absorption coefficient, and consequently, the thermal diffusivity, reaching values of up to 19.32 ± 0.65 cm²/s. Based on these results, the phenomenon of this improvement in optical and thermal properties is discussed, suggesting transitions involving the photon-electron-phonon lattice of the advanced nanocomposite.