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<p>This study focuses on the development of biodegradable packaging films from corn husk, enhanced through surface coating with a solution containing starch, neem flower extract, and varying concentrations of glycerol (T<sub>1</sub>: 3&#xa0;g, T<sub>2</sub>: 5&#xa0;g, T<sub>3</sub>: 7&#xa0;g). The biological macromolecules, particularly starch and cellulose, played a key role in improving the film's texture, appearance, and physical properties. Glycerol, as a plasticizer, reduced water absorption (T<sub>1</sub> &gt; T<sub>2</sub> &gt; T<sub>3</sub>), with respective absorption rates of 63.51, 53.69, and 38.96% compared to the uncoated film. SEM analysis confirmed a smoother surface post-coating, while solubility increased with higher glycerol concentrations, ranging from 20 to 45%. The T<sub>2</sub>-coated films exhibited strong antimicrobial properties, showing no microbial growth. Additionally, T<sub>2</sub> displayed superior flexibility, texture, and appearance after all treatments. These findings underscore the advantages of flexible, smooth, biodegradable packaging films derived from corn husk cellulose and starch, aligning with sustainable packaging goals and promoting an eco-friendly alternative for primary packaging.</p> Graphical Abstract <p></p>

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Antimicrobial Packaging Material Based on Waste Corn Husk Coated with Starch and Neem (Azadirachta indica) Flower Extract for Sustainable Food Packaging Applications

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Suman Singh,
  • Arti Topwal,
  • Samiksha Bisht,
  • Kirtiraj K. Gaikwad

摘要

This study focuses on the development of biodegradable packaging films from corn husk, enhanced through surface coating with a solution containing starch, neem flower extract, and varying concentrations of glycerol (T1: 3 g, T2: 5 g, T3: 7 g). The biological macromolecules, particularly starch and cellulose, played a key role in improving the film's texture, appearance, and physical properties. Glycerol, as a plasticizer, reduced water absorption (T1 > T2 > T3), with respective absorption rates of 63.51, 53.69, and 38.96% compared to the uncoated film. SEM analysis confirmed a smoother surface post-coating, while solubility increased with higher glycerol concentrations, ranging from 20 to 45%. The T2-coated films exhibited strong antimicrobial properties, showing no microbial growth. Additionally, T2 displayed superior flexibility, texture, and appearance after all treatments. These findings underscore the advantages of flexible, smooth, biodegradable packaging films derived from corn husk cellulose and starch, aligning with sustainable packaging goals and promoting an eco-friendly alternative for primary packaging.

Graphical Abstract