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<p>Composites based on physically cross-linked polyvinyl alcohol (PVA) alcogels containing electrically conductive polypyrrole (PPy) were obtained. For the first time, polyvinyl alcohol gels (antifreeze-PVA) were formed by gelation of a PVA solution in aqueous ethanol under conditions that prevented freezing of the gel-like composition. During gelation, oxidative polymerization of pyrrole took place. It was shown that addition of ethanol into the system increases the PPy content in anti-freezing PVA gel compared to PVA cryogel (cryo-PVA). The resulting dried composites were characterized by scanning electron microscopy, energy dispersive X-ray microanalysis, and IR spectroscopy. The conductivity of antifreeze-PVA—PPy composites was an order of magnitude higher than that of cryo-PVA—PPy; with the increase in the PPy content, the current–voltage characteristics acquired a non-Ohmic nature.</p>

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Conductive polypyrrole and polyvinyl alcohol composites prepared in aqueous ethanol solutions at low temperatures

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • E. Y. Yagudaeva,
  • A. A. Vikhrov,
  • N. N. Kononov,
  • A. V. Sochilina,
  • S. N. Malakhov,
  • S. G. Dorofeev,
  • V. P. Zubov

摘要

Composites based on physically cross-linked polyvinyl alcohol (PVA) alcogels containing electrically conductive polypyrrole (PPy) were obtained. For the first time, polyvinyl alcohol gels (antifreeze-PVA) were formed by gelation of a PVA solution in aqueous ethanol under conditions that prevented freezing of the gel-like composition. During gelation, oxidative polymerization of pyrrole took place. It was shown that addition of ethanol into the system increases the PPy content in anti-freezing PVA gel compared to PVA cryogel (cryo-PVA). The resulting dried composites were characterized by scanning electron microscopy, energy dispersive X-ray microanalysis, and IR spectroscopy. The conductivity of antifreeze-PVA—PPy composites was an order of magnitude higher than that of cryo-PVA—PPy; with the increase in the PPy content, the current–voltage characteristics acquired a non-Ohmic nature.