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This work focused on the study of optical properties of membranes constructed with organic materials based on polyvinyl alcohol (PVA) and polyvinyl alcohol and polyethylene glycol (PVA/PEG), incorporating the inorganic material SiO2 through the sol-gel method, using PVA (with a concentration of % 10) and concentrated PEG 400 as precursors. Characterizations were done using FTIR spectroscopy and UV-Vis spectroscopy methods, mainly to determine the correct integration of the precursors and their molecular interactions. For FTIR, stretchings were obtained at bands 470 cm−1, 558 cm−1 and 850 cm−1 from the silica, and at 3000 cm−1 y 3200 cm−1 due to the organic material. With respect to UV-Vis spectroscopy, an absorption edge starting at 400 nm was observed. About the physical properties, the PVA membrane presents a smooth, homogenous surface, without fractures. On the other hand, the PVA/PEG membrane is composed of circular patterns on its surface and with apparently lower mechanical resistance. These results contribute directly to future biomedical applications, specifically in regenerative medicine, such as drug release.

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PVA and PVA/PEG Membranes Incorporating Silica Obtained by Sol-Gel Method

  • 会议论文

  • 发表日期：

    2026年

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  • Esly Arleth Carrillo Alvarado,
  • Manuel Alejandro Chairez Ortega,
  • Betania Sánchez Santamaria,
  • Delfino Cornejo Monroy,
  • Amanda Carrillo Castillo

摘要

This work focused on the study of optical properties of membranes constructed with organic materials based on polyvinyl alcohol (PVA) and polyvinyl alcohol and polyethylene glycol (PVA/PEG), incorporating the inorganic material SiO2 through the sol-gel method, using PVA (with a concentration of % 10) and concentrated PEG 400 as precursors. Characterizations were done using FTIR spectroscopy and UV-Vis spectroscopy methods, mainly to determine the correct integration of the precursors and their molecular interactions. For FTIR, stretchings were obtained at bands 470 cm−1, 558 cm−1 and 850 cm−1 from the silica, and at 3000 cm−1 y 3200 cm−1 due to the organic material. With respect to UV-Vis spectroscopy, an absorption edge starting at 400 nm was observed. About the physical properties, the PVA membrane presents a smooth, homogenous surface, without fractures. On the other hand, the PVA/PEG membrane is composed of circular patterns on its surface and with apparently lower mechanical resistance. These results contribute directly to future biomedical applications, specifically in regenerative medicine, such as drug release.