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<p>This study focuses on developing starch-based composites using the solution casting method, with potato starch as the polymer matrix and eggshell powder (ESP) and walnut shell powder (WSP) as fillers. In addition to using ESP and WSP individually, their combinations were also explored to achieve a synergistic effect and address the limitations of plain starch composites. Among the various compositions, the ESP (60) + WSP combination exhibited the most balanced performance across all parameters. The synthesized composites were characterized using FTIR analysis, which showed overlapping peaks, indicating the uniform dispersion of WSP and ESP within the starch matrix. The water solubility test demonstrated that the ESP (60) + WSP combination showed 42.8% total soluble matter (TSM), compared to plain starch 56%, confirming the positive impact of filler deposition on water resistance. The contact angle measurements (46.63°) as compared to plain starch (29.8°) revealed improvements in hydrophobicity, making the composite more resistant to moisture. XRD analysis of the best-performing combination confirmed that adding fillers increased crystallinity by 19.12%. Also, the samples studied for biodegradation. The matrix as well as fillers are explored from natural resources hence making the composite highly suitable candidate for ecofriendly biodegradable packaging applications.</p> Graphical abstract <p></p>

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Development of eggshell & walnut shell powder reinforced starch composites

  • 期刊论文

  • 发表日期：

    2025年5月16日

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  • Adesh Siddhamsittiwar,
  • Gufran A. Ansari,
  • Neha More,
  • Siddhant Vyavahare,
  • Aarti More

摘要

This study focuses on developing starch-based composites using the solution casting method, with potato starch as the polymer matrix and eggshell powder (ESP) and walnut shell powder (WSP) as fillers. In addition to using ESP and WSP individually, their combinations were also explored to achieve a synergistic effect and address the limitations of plain starch composites. Among the various compositions, the ESP (60) + WSP combination exhibited the most balanced performance across all parameters. The synthesized composites were characterized using FTIR analysis, which showed overlapping peaks, indicating the uniform dispersion of WSP and ESP within the starch matrix. The water solubility test demonstrated that the ESP (60) + WSP combination showed 42.8% total soluble matter (TSM), compared to plain starch 56%, confirming the positive impact of filler deposition on water resistance. The contact angle measurements (46.63°) as compared to plain starch (29.8°) revealed improvements in hydrophobicity, making the composite more resistant to moisture. XRD analysis of the best-performing combination confirmed that adding fillers increased crystallinity by 19.12%. Also, the samples studied for biodegradation. The matrix as well as fillers are explored from natural resources hence making the composite highly suitable candidate for ecofriendly biodegradable packaging applications.

Graphical abstract