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<p>In this study, we developed multifunctional nanocomposite structures by hydrothermally incorporating 3%, 5%, and 7% titanium dioxide nanowires (TiO<sub>2</sub> NWs) into a PTFBMA-CS matrix. This matrix was formed by blending PTFBMA polymer derived from 4-trifluoromethylbenzyl methacrylate (TFBMA) monomer with chitosan (CS). Our innovative system demonstrated significant performance improvements in dielectric, thermal, and antimicrobial properties, demonstrating the potential of these structures for various applications. Structural characterizations were performed using FTIR, XRD, SEM–EDX, and TEM techniques, and the TiO<sub>2</sub> NWs were observed to be homogeneously dispersed, retain their anatase phase, and interact strongly with the polymer matrix. Thermal analyses (TGA/DSC) showed that the initial decomposition temperature increased from 314 to 334&#xa0;°C at 7% additive content, and the glass transition temperature (Tg) value increased by approximately 13&#xa0;°C. This is consistent with findings from the literature that metal oxide additives increase heat resistance by stabilizing the amorphous structure. In antimicrobial tests, inhibition zones larger than 10&#xa0;mm were obtained on <i>E. coli, S. aureus</i>, and <i>C. albicans</i> in the 7% additive sample, confirming the contribution of TiO<sub>2</sub> nanoparticles to antimicrobial activity. Dielectric measurements showed that the ε′ value increased significantly with increasing additive content, reaching a value of 7.4 at a frequency of 1000&#xa0;Hz, particularly in the 7% additive sample. This increase is attributed to dipole–dipole interactions generated by the nanostructures and interfacial polarization. Additionally, contact angle measurements revealed that the surface became more hydrophilic (decreased from 64.04° to 50.99°) and the surface free energy increased to 52.97&#xa0;mN/m. This demonstrates the material's suitability for biomedical coating and sensor surface applications. In conclusion, these nanocomposite systems, developed through the synergistic effects of organic (PTFBMA and CS) and inorganic (TiO<sub>2</sub> NW) components, are groundbreaking. The obtained data suggest that the produced nanocomposites can be used in biomedical coatings, dielectric systems, antimicrobial films, and sensor technologies. These structures are considered particularly important in flexible electronics and sustainable biomaterials, generating excitement and anticipation for their future potential.</p>

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Enhanced thermal, dielectric, and antimicrobial performance of fluorinated methacrylate and chitosan-based nanocomposites reinforced with TiO2 nanowires

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • İbrahim Erol,
  • Gofur Khamidov,
  • Rustamov Uktamjon,
  • Tukhtaev Davlat,
  • Sanjar Tillayev

摘要

In this study, we developed multifunctional nanocomposite structures by hydrothermally incorporating 3%, 5%, and 7% titanium dioxide nanowires (TiO2 NWs) into a PTFBMA-CS matrix. This matrix was formed by blending PTFBMA polymer derived from 4-trifluoromethylbenzyl methacrylate (TFBMA) monomer with chitosan (CS). Our innovative system demonstrated significant performance improvements in dielectric, thermal, and antimicrobial properties, demonstrating the potential of these structures for various applications. Structural characterizations were performed using FTIR, XRD, SEM–EDX, and TEM techniques, and the TiO2 NWs were observed to be homogeneously dispersed, retain their anatase phase, and interact strongly with the polymer matrix. Thermal analyses (TGA/DSC) showed that the initial decomposition temperature increased from 314 to 334 °C at 7% additive content, and the glass transition temperature (Tg) value increased by approximately 13 °C. This is consistent with findings from the literature that metal oxide additives increase heat resistance by stabilizing the amorphous structure. In antimicrobial tests, inhibition zones larger than 10 mm were obtained on E. coli, S. aureus, and C. albicans in the 7% additive sample, confirming the contribution of TiO2 nanoparticles to antimicrobial activity. Dielectric measurements showed that the ε′ value increased significantly with increasing additive content, reaching a value of 7.4 at a frequency of 1000 Hz, particularly in the 7% additive sample. This increase is attributed to dipole–dipole interactions generated by the nanostructures and interfacial polarization. Additionally, contact angle measurements revealed that the surface became more hydrophilic (decreased from 64.04° to 50.99°) and the surface free energy increased to 52.97 mN/m. This demonstrates the material's suitability for biomedical coating and sensor surface applications. In conclusion, these nanocomposite systems, developed through the synergistic effects of organic (PTFBMA and CS) and inorganic (TiO2 NW) components, are groundbreaking. The obtained data suggest that the produced nanocomposites can be used in biomedical coatings, dielectric systems, antimicrobial films, and sensor technologies. These structures are considered particularly important in flexible electronics and sustainable biomaterials, generating excitement and anticipation for their future potential.