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<p>The development of nanocomposites can be used to consolidate archaeological materials, such as papyrus sheets, which were prepared and subjected to accelerated thermal aging at 105&#xa0;°C for 7&#xa0;days. Additionally, they can act as biofungicides when treated Oak wood samples are exposed to <i>Pythium tardicrescens</i> (Accession number PV636491) and <i>Fusarium circinatum</i> (Accession number PV636492). Nano-composites containing hydroxypropyl cellulose (HPC) and Regalrez loaded with titanium dioxide nanoparticles (TiO<sub>2</sub>NPs) and nano-crystalline cellulose (NCC) were prepared at 0.5% and 1%. These nanocomposites were characterized using Transmission Electron Microscope (TEM), Dynamic Light Scattering (DLS), and X-ray diffraction (XRD) to determine their size and shape. Both treated and untreated papyrus samples were evaluated before and after aging to assess their morphological, mechanical, and chemical properties using different analytical methods. This included USB microscopy, scanning electron microscopy (SEM), color change measurement, mechanical property assessment, pH analysis, and ATR-FTIR analysis. The results indicated that the treated papyrus sheets by Regalrez loaded with TiO<sub>2</sub>NPs produced the best overall results. With fugal inhibition percentages (FIP) values of 88.14%, 87.03%, and 85.55%, respectively, the treatments HPC (0.5%) loaded with TiO<sub>2</sub>NPs (0.5%), HPC (0.5%) loaded with TiO<sub>2</sub>NPs (1%), and HPC (0.5%) loaded with NCC (0.5%) exhibited the strongest activity against the growth of <i>F. circinatum</i>. The treatments of HPC (0.5%) loaded with TiO<sub>2</sub>NPs (0.5%) and HPC (0.5%) loaded with TiO<sub>2</sub>NPs (1%) showed substantial activities against the growth of <i>P. tardicrescens</i>, which had FIP values of 72.59% and 70.00%, respectively.</p>

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Evaluation of nanocomposites utilizing HPC and Regalrez polymers infused with TiO2 nanoparticles and nanocrystalline cellulose for the consolidation of archaeological papyrus and biofungicides

  • 期刊论文

  • 发表日期：

    2026年7月7日

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  • Mostafa Abdel-Hamied,
  • Abeer A. Mohamed,
  • Eman Megahed,
  • Gehad Khalifa,
  • Hader Shaban,
  • Mayar Hussin,
  • Mazen Farouk,
  • Salma Awad,
  • Shefaa Abd Alazem,
  • Ahmed Mohamed Sadek,
  • Mohamed Z. M. Salem

摘要

The development of nanocomposites can be used to consolidate archaeological materials, such as papyrus sheets, which were prepared and subjected to accelerated thermal aging at 105 °C for 7 days. Additionally, they can act as biofungicides when treated Oak wood samples are exposed to Pythium tardicrescens (Accession number PV636491) and Fusarium circinatum (Accession number PV636492). Nano-composites containing hydroxypropyl cellulose (HPC) and Regalrez loaded with titanium dioxide nanoparticles (TiO2NPs) and nano-crystalline cellulose (NCC) were prepared at 0.5% and 1%. These nanocomposites were characterized using Transmission Electron Microscope (TEM), Dynamic Light Scattering (DLS), and X-ray diffraction (XRD) to determine their size and shape. Both treated and untreated papyrus samples were evaluated before and after aging to assess their morphological, mechanical, and chemical properties using different analytical methods. This included USB microscopy, scanning electron microscopy (SEM), color change measurement, mechanical property assessment, pH analysis, and ATR-FTIR analysis. The results indicated that the treated papyrus sheets by Regalrez loaded with TiO2NPs produced the best overall results. With fugal inhibition percentages (FIP) values of 88.14%, 87.03%, and 85.55%, respectively, the treatments HPC (0.5%) loaded with TiO2NPs (0.5%), HPC (0.5%) loaded with TiO2NPs (1%), and HPC (0.5%) loaded with NCC (0.5%) exhibited the strongest activity against the growth of F. circinatum. The treatments of HPC (0.5%) loaded with TiO2NPs (0.5%) and HPC (0.5%) loaded with TiO2NPs (1%) showed substantial activities against the growth of P. tardicrescens, which had FIP values of 72.59% and 70.00%, respectively.