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<p>Cassava starch film composites increase relevance due to their biodegradability, flexibility, and the potential to replace petrochemical-based polymers. On the other hand, layered double hydroxides (LDH), also known as hydrotalcite-like materials, have been used as polymer additions, improving their mechanical and barrier properties. However, the electrical properties of biocomposite materials have been less explored. In this sense, this work involves obtaining cassava starch-LDH composite biopolymer by casting method.&#xa0;Concentration from 0 to 10% LDH: cassava starch was tested. The results obtained by XRD indicate the change from A-type to B-type with LDH addition. Electrical analysis reveals changes associated with particle–particle interaction. Two types of circuits were obtained to explain the impedance results. Grotthuss mechanism for charge transport was identified for A-type starch. Tan δ exhibits a displacement in the peak through high frequencies as LDH concentration increases. These results suggest re-ordering the conduction pathway and strong interaction between LDH and cassava starch.</p> Graphical abstract <p></p>

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Tunning electrical properties of composite biopolymer based on starch and layered double hydroxides

  • 期刊论文

  • 发表日期：

    2025年2月14日

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  • Nayda Patricia Arias Duque,
  • Estefany Paola Mejía Therán,
  • Oscar Hernán Giraldo Osorio,
  • Jairo Salcedo Mendoza

摘要

Cassava starch film composites increase relevance due to their biodegradability, flexibility, and the potential to replace petrochemical-based polymers. On the other hand, layered double hydroxides (LDH), also known as hydrotalcite-like materials, have been used as polymer additions, improving their mechanical and barrier properties. However, the electrical properties of biocomposite materials have been less explored. In this sense, this work involves obtaining cassava starch-LDH composite biopolymer by casting method. Concentration from 0 to 10% LDH: cassava starch was tested. The results obtained by XRD indicate the change from A-type to B-type with LDH addition. Electrical analysis reveals changes associated with particle–particle interaction. Two types of circuits were obtained to explain the impedance results. Grotthuss mechanism for charge transport was identified for A-type starch. Tan δ exhibits a displacement in the peak through high frequencies as LDH concentration increases. These results suggest re-ordering the conduction pathway and strong interaction between LDH and cassava starch.

Graphical abstract