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<p>Graphene and zinc oxide-based materials have shown impressive potential due to their ease of preparation, renewability, unique catalytic properties, and exceptional physical characteristics, including a large surface area and mechanical strength. This study reports the synthesis and characterization of pure chitosan (CS) and ZnO/GO-CS composite films with enhanced structural, electrical, mechanical, optical, and antibacterial properties. XRD and EDX confirm the effective integration and crystalline stability of ZnO and GO within the chitosan matrix. The ZnO/GO-CS films exhibit high transparency in the visible range, strong violet-blue photoluminescence, improved electrical conductivity, and superior mechanical properties, including higher tensile strength and flexibility. Antibacterial tests reveal significant efficacy of ZnO/GO-CS against <i>Escherichia coli</i> and <i>Staphylococcus aureus</i>, achieving a &gt; 99% reduction in bacterial viability, compared to only ~ 5% with pure CS. In the disk diffusion method, ZnO/GO-CS films produced inhibition zones of 32 mm and 28 mm for <i>S. aureus</i> and <i>E. coli</i>, respectively, compared to 8 mm and 4 mm for pure CS. These results demonstrate the multifunctional capabilities of ZnO/GO-CS composite films, offering a biosafe, renewable, and efficient solution for biomedical and environmental applications.</p> Graphical Abstract <p></p>

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Biosafe Chitosan Films Reinforced with Zinc Oxide/Graphene Oxide: Comprehensive Multifunctional Properties

  • 期刊论文

  • 发表日期：

    2025年1月24日

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  • Sanaz Almadari,
  • Mohammad Mansoorian,
  • Mehdi Mousavi-Kamazani

摘要

Graphene and zinc oxide-based materials have shown impressive potential due to their ease of preparation, renewability, unique catalytic properties, and exceptional physical characteristics, including a large surface area and mechanical strength. This study reports the synthesis and characterization of pure chitosan (CS) and ZnO/GO-CS composite films with enhanced structural, electrical, mechanical, optical, and antibacterial properties. XRD and EDX confirm the effective integration and crystalline stability of ZnO and GO within the chitosan matrix. The ZnO/GO-CS films exhibit high transparency in the visible range, strong violet-blue photoluminescence, improved electrical conductivity, and superior mechanical properties, including higher tensile strength and flexibility. Antibacterial tests reveal significant efficacy of ZnO/GO-CS against Escherichia coli and Staphylococcus aureus, achieving a > 99% reduction in bacterial viability, compared to only ~ 5% with pure CS. In the disk diffusion method, ZnO/GO-CS films produced inhibition zones of 32 mm and 28 mm for S. aureus and E. coli, respectively, compared to 8 mm and 4 mm for pure CS. These results demonstrate the multifunctional capabilities of ZnO/GO-CS composite films, offering a biosafe, renewable, and efficient solution for biomedical and environmental applications.

Graphical Abstract