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This study presents the synthesis and characterization of alginate-based microcapsules that encapsulate 2-aminobenzothiazole (ABT), an organic corrosion inhibitor intended for controlled-release applications. Alginate (Alg), a low-cost and biocompatible polymer, was utilized to fabricate microcapsules in an aqueous medium at room temperature. The encapsulation process was confirmed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). These methods verified the microcapsules’ structural integrity and thermal stability. The release performance of ABT in a 3.5% NaCl solution was evaluated using electrochemicalImpedance spectroscopy impedanceImpedance spectroscopyElectrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) on copper substrates. The results demonstrated the effectiveness of the sustained ABT release, which resulted in effective corrosion inhibition. The influence of different divalent crosslinking ions (Ca2+, Co2+, and Zn2+) on release behavior and protective efficiency was also assessed, as well as the effect of temperature on release kinetics. The findings indicate that ABT-loaded alginate capsulesAlginate capsule possess the potential to function as eco-friendly, long-lasting corrosion inhibitorsRelease inhibitor, thereby safeguarding metal in aggressive environmentsEnvironment.

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Synthesis and Characterization of Alginate-Based Capsules for Controlled Release of Inhibitors

  • 会议论文

  • 发表日期：

    2026年

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  • Mohammed Lasri,
  • Abdelhadi Louroubi,
  • Nourreddine Idlahoussaine,
  • Aziz ait-karra,
  • Othmane Zakir,
  • Rachid Idouhli,
  • Mohy Eddine Khadiri,
  • Mustapha Ait Ali,
  • Abdesselam Abouelfida

摘要

This study presents the synthesis and characterization of alginate-based microcapsules that encapsulate 2-aminobenzothiazole (ABT), an organic corrosion inhibitor intended for controlled-release applications. Alginate (Alg), a low-cost and biocompatible polymer, was utilized to fabricate microcapsules in an aqueous medium at room temperature. The encapsulation process was confirmed using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). These methods verified the microcapsules’ structural integrity and thermal stability. The release performance of ABT in a 3.5% NaCl solution was evaluated using electrochemicalImpedance spectroscopy impedanceImpedance spectroscopyElectrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) on copper substrates. The results demonstrated the effectiveness of the sustained ABT release, which resulted in effective corrosion inhibition. The influence of different divalent crosslinking ions (Ca2+, Co2+, and Zn2+) on release behavior and protective efficiency was also assessed, as well as the effect of temperature on release kinetics. The findings indicate that ABT-loaded alginate capsulesAlginate capsule possess the potential to function as eco-friendly, long-lasting corrosion inhibitorsRelease inhibitor, thereby safeguarding metal in aggressive environmentsEnvironment.