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<p>The polyvinyl alcohol and carboxymethylcellulose (PVA/CMC) mix matrix is produced through the casting process utilizing 4 wt% SiO<sub>2</sub> nanoparticle reinforcement. The nanocomposite blend films were subsequently exposed to varying doses of gamma radiation. The addition of SiO<sub>2</sub> and its interaction with the blend matrix were examined using FTIR, which revealed changes in the band intensity. After gamma exposure, the absorbance band intensities are decreased compared with the pristine blend and pristine nanocomposite. Furthermore, the surface wettability and roughness of both the pristine blend matrix and the pristine nanocomposite were examined for the first time at various gamma doses through measurements. The variables of contact angle and surface roughness were investigated. Both the surface roughness and the wettability rise as the SiO<sub>2</sub> content of the matrix does, as well after gamma exposure. Additionally, using the spectrophotometer’s UV-visible spectra, the optical parameters were ascertained. Through the use of Tauc’s relation, the bandgap energy was shown to drop for both direct from 5.20 to 2.90&#xa0;eV and indirect transitions from 5.20 to 2.90&#xa0;eV and from 4.60 to 2.20&#xa0;eV for (PVA/CMC) and (PVA/CMC/4%SiO<sub>2</sub>/120&#xa0;kGy), respectively. Furthermore, the refractive index of the PVA/CMC blend improved from 1.4243 to 1.9896 for PVA/CMC and PVA/CMC/4%SiO<sub>2</sub>/120&#xa0;kGy, respectively. Optical conductivity and optical dielectric constants have risen according to further studies. These materials show potential for food packaging, flexible electronics, sensors, biomedical coatings, and eco-friendly films.</p>

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Gamma radiation effects on SiO2 reinforced PVA/CMC nanocomposite films: structural, wettability, and optical properties

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Sultan J. Alsufyani,
  • M. F. Zaki,
  • S. Abouelazm,
  • T. S. Soliman,
  • Norah Alsairy,
  • A. Saftah,
  • Tayseer I. Al-Naggar

摘要

The polyvinyl alcohol and carboxymethylcellulose (PVA/CMC) mix matrix is produced through the casting process utilizing 4 wt% SiO2 nanoparticle reinforcement. The nanocomposite blend films were subsequently exposed to varying doses of gamma radiation. The addition of SiO2 and its interaction with the blend matrix were examined using FTIR, which revealed changes in the band intensity. After gamma exposure, the absorbance band intensities are decreased compared with the pristine blend and pristine nanocomposite. Furthermore, the surface wettability and roughness of both the pristine blend matrix and the pristine nanocomposite were examined for the first time at various gamma doses through measurements. The variables of contact angle and surface roughness were investigated. Both the surface roughness and the wettability rise as the SiO2 content of the matrix does, as well after gamma exposure. Additionally, using the spectrophotometer’s UV-visible spectra, the optical parameters were ascertained. Through the use of Tauc’s relation, the bandgap energy was shown to drop for both direct from 5.20 to 2.90 eV and indirect transitions from 5.20 to 2.90 eV and from 4.60 to 2.20 eV for (PVA/CMC) and (PVA/CMC/4%SiO2/120 kGy), respectively. Furthermore, the refractive index of the PVA/CMC blend improved from 1.4243 to 1.9896 for PVA/CMC and PVA/CMC/4%SiO2/120 kGy, respectively. Optical conductivity and optical dielectric constants have risen according to further studies. These materials show potential for food packaging, flexible electronics, sensors, biomedical coatings, and eco-friendly films.