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<p>This study explores a surface functionalization approach using stearic acid to enhance the performance of polypropylene (PP)-based nanocomposites reinforced with titanium dioxide (TiO₂) nanostructures. Both untreated and stearic acid-treated TiO₂ were incorporated into the PP matrix to systematically investigate their influence on the multifunctional properties of the composites. Comprehensive characterization was carried out to assess the effects of surface treatment on structural, morphological, electrical, and mechanical behaviors. Fourier Transform Infrared (FTIR), and X-ray Diffraction (XRD) analyses confirmed the successful surface modification of TiO₂ and its influence on the crystalline structure of the polymer matrix. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) observations revealed improved nanoparticle dispersion, reduced agglomeration, and enhanced interfacial compatibility in composites containing treated TiO₂. Electrical conductivity measurements showed significant enhancement with increasing TiO₂ content, particularly in treated systems, due to better nanoparticle distribution. Rheological and impact resistance analyses indicated that surface-modified TiO₂ preserved flow properties at low filler content and improved toughness at higher loadings. These results demonstrate that stearic acid-modified TiO₂ can serve as an effective strategy for improving the multifunctionality of PP-based nanocomposites.</p>

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Molecular-level surface modification of TiO₂ nanostructures with stearic acid for enhanced polypropylene nanocomposite performance

  • 期刊论文

  • 发表日期：

    2025年12月8日

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  • Fatma Zohra Benabid,
  • Samir Kridi,
  • Oum Keltoum Mallem,
  • Foued Zouai,
  • Mohammad Ehtisham Khan,
  • Syed Kashif Ali,
  • Wahid Ali,
  • Anwar Ulla Khan,
  • Mohd Imran,
  • Akbar Mohammad,
  • Abdulrahman Khamaj

摘要

This study explores a surface functionalization approach using stearic acid to enhance the performance of polypropylene (PP)-based nanocomposites reinforced with titanium dioxide (TiO₂) nanostructures. Both untreated and stearic acid-treated TiO₂ were incorporated into the PP matrix to systematically investigate their influence on the multifunctional properties of the composites. Comprehensive characterization was carried out to assess the effects of surface treatment on structural, morphological, electrical, and mechanical behaviors. Fourier Transform Infrared (FTIR), and X-ray Diffraction (XRD) analyses confirmed the successful surface modification of TiO₂ and its influence on the crystalline structure of the polymer matrix. Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) observations revealed improved nanoparticle dispersion, reduced agglomeration, and enhanced interfacial compatibility in composites containing treated TiO₂. Electrical conductivity measurements showed significant enhancement with increasing TiO₂ content, particularly in treated systems, due to better nanoparticle distribution. Rheological and impact resistance analyses indicated that surface-modified TiO₂ preserved flow properties at low filler content and improved toughness at higher loadings. These results demonstrate that stearic acid-modified TiO₂ can serve as an effective strategy for improving the multifunctionality of PP-based nanocomposites.