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<p>In this study, phyto-synthesised zinc oxide nanoparticles (ZnO NPs) from <i>Terminalia chebula (TC)</i> fruit extract and zinc citrate dihydrate were reinforced into methylcellulose (MC) to fabricate MC/ZnO (1.0–5.0 wt.%) nanocomposite (NC) films via the solution-casting technique. The phyto-synthesised ZnO NPs exhibited a crystalline wurtzite structure with an average size of ~ 18.8&#xa0;nm. X-ray diffraction (XRD) and attenuated total reflectance (ATR)-Fourier-transform infrared (FT-IR) analyses confirmed the incorporation of ZnO NPs into the MC matrix, which resulted in enhanced functional performance of the MC/ZnO NC films. Notably, the MC/3.0 wt.% ZnO NC film demonstrated improved tensile strength (~ 31.85&#xa0;MPa), Young’s modulus (~ 1316.52&#xa0;MPa) and reduced water vapor permeability (~ 2.49 × 10<sup>− 10</sup> g·m<sup>− 1</sup>·s<sup>− 1</sup>·Pa<sup>− 1</sup>) compared to the neat MC film. The MC/5.0 wt.% ZnO NC film exhibited UV-shielding (UV-A ~ 85.07%, UV-B ~ 84.62%), antioxidant activity (~ 57.2% DPPH inhibition), and pronounced antibacterial activity against <i>E. coli</i> (~ 70.01% inhibition) than <i>S. aureus</i> (~ 35.09% inhibition).</p>

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Phyto-assisted synthesis of zinc oxide nanoparticles to develop multifunctional methylcellulose/zinc oxide nanocomposite films for food packaging

  • 期刊论文

  • 发表日期：

    2026年6月25日

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  • Srikanth R. Veerabhadraiah,
  • Sweta Maji,
  • Ashique Thazheparamban,
  • Suresh Chandra Varsha,
  • Sudheer Kumar Yannam,
  • Arunkumar Panneerselvam

摘要

In this study, phyto-synthesised zinc oxide nanoparticles (ZnO NPs) from Terminalia chebula (TC) fruit extract and zinc citrate dihydrate were reinforced into methylcellulose (MC) to fabricate MC/ZnO (1.0–5.0 wt.%) nanocomposite (NC) films via the solution-casting technique. The phyto-synthesised ZnO NPs exhibited a crystalline wurtzite structure with an average size of ~ 18.8 nm. X-ray diffraction (XRD) and attenuated total reflectance (ATR)-Fourier-transform infrared (FT-IR) analyses confirmed the incorporation of ZnO NPs into the MC matrix, which resulted in enhanced functional performance of the MC/ZnO NC films. Notably, the MC/3.0 wt.% ZnO NC film demonstrated improved tensile strength (~ 31.85 MPa), Young’s modulus (~ 1316.52 MPa) and reduced water vapor permeability (~ 2.49 × 10− 10 g·m− 1·s− 1·Pa− 1) compared to the neat MC film. The MC/5.0 wt.% ZnO NC film exhibited UV-shielding (UV-A ~ 85.07%, UV-B ~ 84.62%), antioxidant activity (~ 57.2% DPPH inhibition), and pronounced antibacterial activity against E. coli (~ 70.01% inhibition) than S. aureus (~ 35.09% inhibition).