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<p>This study explores the development of biodegradable cassava starch films enriched with cassava root cortex extract, an underutilized agricultural byproduct rich in phenolic compounds, for sustainable food packaging applications. The extract was incorporated at concentrations of 20%, 30%, 40%, and 50% (w/w), and the films were characterized for their physical, mechanical, antioxidant, and biodegradability properties. Scanning electron microscopy (SEM) revealed that increasing extract concentrations led to denser and more heterogeneous film matrices, while Fourier-transform infrared spectroscopy (FT-IR) confirmed chemical interactions between phenolic compounds and the starch matrix. Films with 50% extract exhibited a total phenolic content of 187&#xa0;mg GAE/100&#xa0;g and a significant increase in antioxidant activity (FRAP: 19.62 mmol Fe²⁺/kg), demonstrating their potential for active packaging. Migration tests in simulated food environments (aqueous, acidic, and fatty) revealed controlled release of phenolic compounds, with the highest diffusion observed in aqueous and acidic media. Biodegradability studies demonstrated up to 27% weight loss after six weeks of composting, highlighting the films’ environmental sustainability. These findings underscore the dual functionality of cassava root cortex-enriched films as both antioxidant-active and biodegradable materials, offering a promising alternative to conventional petroleum-based plastics for sustainable food packaging.</p>

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Development and Characterization of Cassava Starch Films Enriched with Cassava Root Cortex Extract: Functional, Structural, and Biodegradability Insights

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Maria Eduarda Martins Duarte,
  • Tálysson Raphael Rodrigues Pereira,
  • Agdylannah Felix Vieira,
  • Newton Carlos Santos,
  • Deyzi Santos Gouveia,
  • Hugo M. Lisboa,
  • Ana Paula Trindade Rocha

摘要

This study explores the development of biodegradable cassava starch films enriched with cassava root cortex extract, an underutilized agricultural byproduct rich in phenolic compounds, for sustainable food packaging applications. The extract was incorporated at concentrations of 20%, 30%, 40%, and 50% (w/w), and the films were characterized for their physical, mechanical, antioxidant, and biodegradability properties. Scanning electron microscopy (SEM) revealed that increasing extract concentrations led to denser and more heterogeneous film matrices, while Fourier-transform infrared spectroscopy (FT-IR) confirmed chemical interactions between phenolic compounds and the starch matrix. Films with 50% extract exhibited a total phenolic content of 187 mg GAE/100 g and a significant increase in antioxidant activity (FRAP: 19.62 mmol Fe²⁺/kg), demonstrating their potential for active packaging. Migration tests in simulated food environments (aqueous, acidic, and fatty) revealed controlled release of phenolic compounds, with the highest diffusion observed in aqueous and acidic media. Biodegradability studies demonstrated up to 27% weight loss after six weeks of composting, highlighting the films’ environmental sustainability. These findings underscore the dual functionality of cassava root cortex-enriched films as both antioxidant-active and biodegradable materials, offering a promising alternative to conventional petroleum-based plastics for sustainable food packaging.