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<p>Packaging films based on biopolymers are gaining global attention because of their sustainability compared to plastic packaging. In this study, TiO<sub>2</sub> nanoparticles (NPs) were incorporated into a chitosan/starch (CS/S) biocomposite to develop a food-packaging film. The CS/S/TiO<sub>2</sub> films were investigated by scanning electron microscopy (SEM) for morphology, fourier transform infrared spectroscopy (FTIR) for structural analysis, and thermogravimetric analysis (TGA) for thermal stability. These films offer a promising platform owing to their antioxidant and antimicrobial properties, and balanced barrier performance. The presence of TiO<sub>2</sub> nanoparticles in CS/S/TiO<sub>2−</sub>50films increased the efficiency of antioxidant release, along with a noticeable decrease in porosity (69.83 ± 0.5%), moisture content (23.36 <b>±</b> 0.5%) and water solubility (20.58 ± 0.5%) than pure CS films. The CS/S/TiO<sub>2</sub>50 film showed an antimicrobial potential against Gram-positive <i>P. aeruginosa</i> (inhibition zone 12.3&#xa0;mm), <i>S. aureus</i> (12.6&#xa0;mm) and Gram-negative B. <i>Subtilius</i> (18.6&#xa0;mm) and <i>E. coli</i> bacteria (12.8&#xa0;mm). These bionanocomposites displayed good shelf-life protection for green chilies and great potential in the future of packaging films.</p>

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Physiochemical, antimicrobial and antioxidant properties of chitosan/starch/TiO2 bionanocomposites for food packaging applications

  • 期刊论文

  • 发表日期：

    2026年4月16日

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  • Shalinee Singh,
  • Santosh Kumar

摘要

Packaging films based on biopolymers are gaining global attention because of their sustainability compared to plastic packaging. In this study, TiO2 nanoparticles (NPs) were incorporated into a chitosan/starch (CS/S) biocomposite to develop a food-packaging film. The CS/S/TiO2 films were investigated by scanning electron microscopy (SEM) for morphology, fourier transform infrared spectroscopy (FTIR) for structural analysis, and thermogravimetric analysis (TGA) for thermal stability. These films offer a promising platform owing to their antioxidant and antimicrobial properties, and balanced barrier performance. The presence of TiO2 nanoparticles in CS/S/TiO2−50films increased the efficiency of antioxidant release, along with a noticeable decrease in porosity (69.83 ± 0.5%), moisture content (23.36 ± 0.5%) and water solubility (20.58 ± 0.5%) than pure CS films. The CS/S/TiO250 film showed an antimicrobial potential against Gram-positive P. aeruginosa (inhibition zone 12.3 mm), S. aureus (12.6 mm) and Gram-negative B. Subtilius (18.6 mm) and E. coli bacteria (12.8 mm). These bionanocomposites displayed good shelf-life protection for green chilies and great potential in the future of packaging films.