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<p>The persistent accumulation of non-biodegradable plastic packaging necessitates the development of high-performance and biodegradable alternatives. This study evaluates corn cob biomass, a low value agricultural residue, as a functional reinforcing component in PVA-based biodegradable films. Corn cob powder exhibited a composition rich in structural polymers (16.6% acid-insoluble lignin, 31.6% cellulose, 38.4% hemicellulose), indicating its suitability for mechanical reinforcement. Using Box–Behnken experimental design films were formulated with varying PVA, corn cob powder and glycerol concentrations. The optimized formulation achieved a tensile strength of 10.9&#xa0;MPa at 10% PVA, 10% corn cob powder, and 3.5% glycerol, while the maximum elongation at break (1.11%) was obtained at 2% PVA, 2% corn cob powder, and 3.5% glycerol. Biodegradability improved evidently, with PVA–corn cob films reaching 62% weight loss in 60&#xa0;days, compared to 47% for neat PVA films. These findings demonstrate that corn cob biomass not only enhances mechanical stability but also accelerates environmental breakdown, Overall, the study establishes corn cob-reinforced PVA films as a technically viable and environmentally advantageous alternative for sustainable food packaging applications, with further work recommended on barrier properties and industrial scale processing.</p>

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Development of corn cob-reinforced PVA biodegradable films for eco-efficient food packaging

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • J. Merlin,
  • N. Nirmala,
  • Ayona Jayadev,
  • Deepa Indira Nair,
  • Geena Prasad

摘要

The persistent accumulation of non-biodegradable plastic packaging necessitates the development of high-performance and biodegradable alternatives. This study evaluates corn cob biomass, a low value agricultural residue, as a functional reinforcing component in PVA-based biodegradable films. Corn cob powder exhibited a composition rich in structural polymers (16.6% acid-insoluble lignin, 31.6% cellulose, 38.4% hemicellulose), indicating its suitability for mechanical reinforcement. Using Box–Behnken experimental design films were formulated with varying PVA, corn cob powder and glycerol concentrations. The optimized formulation achieved a tensile strength of 10.9 MPa at 10% PVA, 10% corn cob powder, and 3.5% glycerol, while the maximum elongation at break (1.11%) was obtained at 2% PVA, 2% corn cob powder, and 3.5% glycerol. Biodegradability improved evidently, with PVA–corn cob films reaching 62% weight loss in 60 days, compared to 47% for neat PVA films. These findings demonstrate that corn cob biomass not only enhances mechanical stability but also accelerates environmental breakdown, Overall, the study establishes corn cob-reinforced PVA films as a technically viable and environmentally advantageous alternative for sustainable food packaging applications, with further work recommended on barrier properties and industrial scale processing.