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<p>This study evaluates the potential of potato peel waste (PW) as a sustainable raw material to create biodegradable films. By incorporating sodium alginate (SA) at 10%, 20%, and 30% ratios, and calcium chloride (CaCl₂) as a crosslinking agent, the research aims to address the limitations of PW films, particularly their poor mechanical and moisture barrier properties. The results revealed a 69% increase in tensile strength and a 76% enhancement in elongation at break for crosslinked 20% SA films compared to pure PW films. Non-crosslinked 20% SA films, while having slightly lower mechanical properties, exhibited a 112% increase in elongation at break, offering improved flexibility for certain applications. Water vapor permeability (WVP) was reduced by 30%, from 2.4 × 10⁻12 g/(Pa·cm·s) in the PW film to 1.6 × 10⁻12 g/(Pa·cm·s) in the crosslinked 30% SA formulation. These improvements in both mechanical strength and moisture resistance highlight the potential of PW-based films as a viable, sustainable alternative for packaging applications. This research offers a promising solution for repurposing potato peel waste, reducing reliance on petroleum-based products, and addressing agricultural waste environmental challenges.</p>

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Sustainable biocomposites from potato peel waste: effects of sodium alginate and crosslinking on material properties

  • 期刊论文

  • 发表日期：

    2026年3月7日

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  • Mohsen Sadeghi-Shapourabadi,
  • Mathieu Robert,
  • Said Elkoun

摘要

This study evaluates the potential of potato peel waste (PW) as a sustainable raw material to create biodegradable films. By incorporating sodium alginate (SA) at 10%, 20%, and 30% ratios, and calcium chloride (CaCl₂) as a crosslinking agent, the research aims to address the limitations of PW films, particularly their poor mechanical and moisture barrier properties. The results revealed a 69% increase in tensile strength and a 76% enhancement in elongation at break for crosslinked 20% SA films compared to pure PW films. Non-crosslinked 20% SA films, while having slightly lower mechanical properties, exhibited a 112% increase in elongation at break, offering improved flexibility for certain applications. Water vapor permeability (WVP) was reduced by 30%, from 2.4 × 10⁻12 g/(Pa·cm·s) in the PW film to 1.6 × 10⁻12 g/(Pa·cm·s) in the crosslinked 30% SA formulation. These improvements in both mechanical strength and moisture resistance highlight the potential of PW-based films as a viable, sustainable alternative for packaging applications. This research offers a promising solution for repurposing potato peel waste, reducing reliance on petroleum-based products, and addressing agricultural waste environmental challenges.