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<p>The growing demand for multifunctional materials in electronics, biomedical devices, and packaging has directed increasing attention toward polymer-based nanocomposites. In this work, a fluorine-containing methacrylate derivative (PTFBMA) was synthesized and blended with poly(vinyl alcohol) (PVA) biopolymer to produce biogenic silver nanoparticles (AgNPs)-containing nanocomposite structures. Trifluoromethyl group and ester chains containing fluorine atoms have the potential to provide high thermal stability, hydrophobic surface properties, and microbial interaction control to the polymer matrix. At the same time, AgNPs obtained by green synthesis were integrated into the nanocomposites to increase surface and electrical performance. As a result of structural characterizations, the transition from monomer to polymer was confirmed by FTIR and NMR analyses; SEM images showed that AgNPs were dispersed and embedded in the matrix, and EDX analyses confirmed an Ag content of up to 23.4%. XRD data showed distinct diffraction peaks belonging to AgNPs at 38.1°, 44.3°, and 64.4° angles. In TGA analysis, it was determined that pure PTFBMA started to decompose at 360&#xa0;°C, and this temperature increased to 390&#xa0;°C with 7% AgNPs incorporated. DSC data showed that the glass transition temperature ranged from 85&#xa0;°C to 101&#xa0;°C. In surface contact angle measurements, the increase in the water angle from 53.75° to 70.07° with AgNPs incorporation showed that the surface became more hydrophobic. In dielectric analysis, the AC conductivity value at 1&#xa0;MHz increased to 7.7 × 10<sup>− 6</sup> S/m, the impedance decreased from 3 × 10⁶ ohm to 10⁴ ohm, and the ε′ value was measured as 7.63 in the 7% AgNPs incorporation sample. In addition, the sample containing 5% AgNPs stood out as the most effective structure in biological tests, with an inhibition zone of 11.66&#xa0;mm on <i>C. albicans</i>. The data gathered shows that the nanocomposites produced can be used in food and medical packaging, antimicrobial, flexible electronic devices, and coating areas.</p>

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PVA-Based Nanocomposites Reinforced with Fluorinated Methacrylate and Green-Synthesized AgNPs: Enhanced Thermal, Dielectric, Surface, and Antimicrobial Properties

  • 期刊论文

  • 发表日期：

    2025年8月8日

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  • Ibrahim Erol,
  • Gofur Khamidov,
  • Odilov Khasanjon,
  • Ömer Hazman,
  • Ibrahim Ismail,
  • Tukhtaev Davlat,
  • Sanjar Tillayev,
  • Alisher Yusupov

摘要

The growing demand for multifunctional materials in electronics, biomedical devices, and packaging has directed increasing attention toward polymer-based nanocomposites. In this work, a fluorine-containing methacrylate derivative (PTFBMA) was synthesized and blended with poly(vinyl alcohol) (PVA) biopolymer to produce biogenic silver nanoparticles (AgNPs)-containing nanocomposite structures. Trifluoromethyl group and ester chains containing fluorine atoms have the potential to provide high thermal stability, hydrophobic surface properties, and microbial interaction control to the polymer matrix. At the same time, AgNPs obtained by green synthesis were integrated into the nanocomposites to increase surface and electrical performance. As a result of structural characterizations, the transition from monomer to polymer was confirmed by FTIR and NMR analyses; SEM images showed that AgNPs were dispersed and embedded in the matrix, and EDX analyses confirmed an Ag content of up to 23.4%. XRD data showed distinct diffraction peaks belonging to AgNPs at 38.1°, 44.3°, and 64.4° angles. In TGA analysis, it was determined that pure PTFBMA started to decompose at 360 °C, and this temperature increased to 390 °C with 7% AgNPs incorporated. DSC data showed that the glass transition temperature ranged from 85 °C to 101 °C. In surface contact angle measurements, the increase in the water angle from 53.75° to 70.07° with AgNPs incorporation showed that the surface became more hydrophobic. In dielectric analysis, the AC conductivity value at 1 MHz increased to 7.7 × 10− 6 S/m, the impedance decreased from 3 × 10⁶ ohm to 10⁴ ohm, and the ε′ value was measured as 7.63 in the 7% AgNPs incorporation sample. In addition, the sample containing 5% AgNPs stood out as the most effective structure in biological tests, with an inhibition zone of 11.66 mm on C. albicans. The data gathered shows that the nanocomposites produced can be used in food and medical packaging, antimicrobial, flexible electronic devices, and coating areas.