Scholarlink

<p>Advanced materials are now a major force behind technological progress in a variety of fields, such as aerospace, energy, electronics, biomedicine, and environmental protection. The tremendous progress in these materials is helping to address global issues, ranging from high-performance nanocomposites to new materials and biodegradable polymers. This study seeks to fabricate nanocomposite films formed by hydroxypropyl methyl cellulose (HPMC) and iron oxide nanoparticles (Fe<sub>2</sub>O<sub>3</sub>-NPs) via the solution casting technique, and to evaluate their morphological, macrostructural, thermal, and optical properties for enhanced application in numerous domains such as optoelectronic and food packaging. The prepared nanocomposites were thoroughly examined using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis, and visible optical spectroscopy. SEM micrographs revealed that Fe<sub>2</sub>O<sub>3</sub>-NPs were uniformly distributed throughout the doped HPMC matrix. FTIR spectroscopy demonstrated that interactions between -OH groups in the HPMC/Fe<sub>2</sub>O<sub>3</sub> nanocomposites facilitated the full dispersion of Fe<sub>2</sub>O<sub>3</sub>-NPs inside the HPMC network. The TG/DTG thermograms indicated that the nanocomposite displayed enhanced thermal stability when Fe<sub>2</sub>O<sub>3</sub>-NPs were incorporated to HPMC. The thermokinetic coefficients were calculated using the Coats-Redfern equation. The Tauc equation was used to determine the optical band gap energy using the visible absorption spectra. The band gap energy for the direct transition decreased from 2.343 ± 0.171 to 1.666 ± 0.803 eV, and the number of carbon clusters in the nanocomposite increased from 216 to 427 with increasing Fe₂O₃-NPs concentration from 0 to 10.0 wt%. As the amount of Fe₂O₃ nanoparticles increased, the Urbach energy value ​​rose sharply from 0.947 ± 0.074 to 9.079 ± 0.439 eV. Using a single-oscillator model, the dispersion energies and associated parameters were computed. The linear and nonlinear optical parameters were found to depend on the concentration of Fe<sub>2</sub>O<sub>3</sub>-NPs. The results confirmed significant changes in the produced nanocomposite films, paving ahead for their potential usage as flexible materials in a wide range of useful technological applications, including optoelectronic devices and biodegradable food packaging.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Improving the structure, thermal, and optical properties of HPMC/Fe2O3 nanocomposites for advanced technological applications

  • 期刊论文

  • 发表日期：

    2026年4月13日

查看全文
  • Manal T. H. Moselhy,
  • Najlaa D. Alharbi,
  • Osiris W. Guirguis

摘要

Advanced materials are now a major force behind technological progress in a variety of fields, such as aerospace, energy, electronics, biomedicine, and environmental protection. The tremendous progress in these materials is helping to address global issues, ranging from high-performance nanocomposites to new materials and biodegradable polymers. This study seeks to fabricate nanocomposite films formed by hydroxypropyl methyl cellulose (HPMC) and iron oxide nanoparticles (Fe2O3-NPs) via the solution casting technique, and to evaluate their morphological, macrostructural, thermal, and optical properties for enhanced application in numerous domains such as optoelectronic and food packaging. The prepared nanocomposites were thoroughly examined using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis, and visible optical spectroscopy. SEM micrographs revealed that Fe2O3-NPs were uniformly distributed throughout the doped HPMC matrix. FTIR spectroscopy demonstrated that interactions between -OH groups in the HPMC/Fe2O3 nanocomposites facilitated the full dispersion of Fe2O3-NPs inside the HPMC network. The TG/DTG thermograms indicated that the nanocomposite displayed enhanced thermal stability when Fe2O3-NPs were incorporated to HPMC. The thermokinetic coefficients were calculated using the Coats-Redfern equation. The Tauc equation was used to determine the optical band gap energy using the visible absorption spectra. The band gap energy for the direct transition decreased from 2.343 ± 0.171 to 1.666 ± 0.803 eV, and the number of carbon clusters in the nanocomposite increased from 216 to 427 with increasing Fe₂O₃-NPs concentration from 0 to 10.0 wt%. As the amount of Fe₂O₃ nanoparticles increased, the Urbach energy value ​​rose sharply from 0.947 ± 0.074 to 9.079 ± 0.439 eV. Using a single-oscillator model, the dispersion energies and associated parameters were computed. The linear and nonlinear optical parameters were found to depend on the concentration of Fe2O3-NPs. The results confirmed significant changes in the produced nanocomposite films, paving ahead for their potential usage as flexible materials in a wide range of useful technological applications, including optoelectronic devices and biodegradable food packaging.