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<p>This study aimed at the controlled synthesis of zinc oxide (ZnO) nanofibers via the polyol process and their subsequent incorporation into a poly (vinyl butyral) (PVB) matrix, with the goal of developing nanocomposites with enhanced thermomechanical properties. Two synthesis routes were investigated, with the most successful one being optimized through the addition of poly(vinylpyrrolidone) (PVP) to ensure morphological control of the nanostructures. Scanning and transmission electron microscopy (SEM and TEM) analyses confirmed that the optimization of the synthetic parameters, notably the variation of PVP molecular weight, was crucial to suppress the formation of spherical nanoparticles and obtain ZnO nanofibers with high aspect ratio and greater homogeneity. The optimized synthesis route was then employed to fabricate PVB/ZnO nanocomposites by casting. Structural, thermal (thermogravimetric analysis – TGA), and dynamic-mechanical (dynamic mechanical analysis – DMA) characterizations revealed that the incorporation of the nanofibers significantly altered the physical-mechanical behavior of PVB. The results show that the nanocomposite containing 5% ZnO nanofibers exhibited a remarkable 15% increase in storage modulus compared to the neat matrix, indicating strong interfacial interactions between the nanoscale reinforcement and the polymer matrix. These findings demonstrate the effectiveness of the methodological approach for controlling ZnO morphology, confirming that the obtained nanofibers act as superior reinforcement for the PVB matrix, paving the way for applications requiring enhanced thermomechanical performance.</p>

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Morphological Control in the Production of Nanometric-Scale Zinc Oxide Nanowires by the Polyol Process for Incorporation into PVB

  • 期刊论文

  • 发表日期：

    2025年11月15日

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  • Renato César Tobias,
  • Patrícia Zigoski Uchôa,
  • Bruna Louise Silva,
  • Denise Abatti Kasper Silva,
  • Jean Carlos Hoepfner,
  • Sérgio Henrique Pezzin

摘要

This study aimed at the controlled synthesis of zinc oxide (ZnO) nanofibers via the polyol process and their subsequent incorporation into a poly (vinyl butyral) (PVB) matrix, with the goal of developing nanocomposites with enhanced thermomechanical properties. Two synthesis routes were investigated, with the most successful one being optimized through the addition of poly(vinylpyrrolidone) (PVP) to ensure morphological control of the nanostructures. Scanning and transmission electron microscopy (SEM and TEM) analyses confirmed that the optimization of the synthetic parameters, notably the variation of PVP molecular weight, was crucial to suppress the formation of spherical nanoparticles and obtain ZnO nanofibers with high aspect ratio and greater homogeneity. The optimized synthesis route was then employed to fabricate PVB/ZnO nanocomposites by casting. Structural, thermal (thermogravimetric analysis – TGA), and dynamic-mechanical (dynamic mechanical analysis – DMA) characterizations revealed that the incorporation of the nanofibers significantly altered the physical-mechanical behavior of PVB. The results show that the nanocomposite containing 5% ZnO nanofibers exhibited a remarkable 15% increase in storage modulus compared to the neat matrix, indicating strong interfacial interactions between the nanoscale reinforcement and the polymer matrix. These findings demonstrate the effectiveness of the methodological approach for controlling ZnO morphology, confirming that the obtained nanofibers act as superior reinforcement for the PVB matrix, paving the way for applications requiring enhanced thermomechanical performance.