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This study investigates the complexation process between Chitosan (Ch) and Gum Arabic (GA) in bulk using electricalElectrical impedanceImpedance spectroscopyImpedance spectroscopy (EIS). While previous analyses using the Randles equivalent circuitEquivalent circuit were limited to a narrow frequency range (1– \({10}^{3}\) Hz), we performed simulations to generate impedanceImpedance and admittance data across an extended frequency range ( \({10}^{-4}\) – \({10}^{5}\) Hz) to better characterize the relaxation dynamics. Our analysis of complex conductivityConductivity revealed a minimum ionic strengthIonic strength at a 7:1 (GA: Ch) ratio, coinciding with a maximum relaxation time, identifying this as the optimal complexation mass ratio. An improved equivalent circuitEquivalent circuit model was proposed that accurately reproduces the observed impedanceImpedance and conductivity behavior, demonstrating that frequency-dependent characteristics are influenced by active layer thickness. This analysis provides a comprehensive understanding of polyelectrolyte complexation for biomaterial applications.

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Investigation of Electrical Properties in the Complexation of Gum Arabic and Chitosan: Insights from Complex Impedance and Conductivity Analysis

  • 会议论文

  • 发表日期：

    2026年

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  • Soumia Zaim,
  • Rchid Halima,
  • Nmila Rachid,
  • Elmoznine Reddad

摘要

This study investigates the complexation process between Chitosan (Ch) and Gum Arabic (GA) in bulk using electricalElectrical impedanceImpedance spectroscopyImpedance spectroscopy (EIS). While previous analyses using the Randles equivalent circuitEquivalent circuit were limited to a narrow frequency range (1– \({10}^{3}\) Hz), we performed simulations to generate impedanceImpedance and admittance data across an extended frequency range ( \({10}^{-4}\) – \({10}^{5}\) Hz) to better characterize the relaxation dynamics. Our analysis of complex conductivityConductivity revealed a minimum ionic strengthIonic strength at a 7:1 (GA: Ch) ratio, coinciding with a maximum relaxation time, identifying this as the optimal complexation mass ratio. An improved equivalent circuitEquivalent circuit model was proposed that accurately reproduces the observed impedanceImpedance and conductivity behavior, demonstrating that frequency-dependent characteristics are influenced by active layer thickness. This analysis provides a comprehensive understanding of polyelectrolyte complexation for biomaterial applications.