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<p>In this work, poly (lactic acid)/strontium yttrium oxide (PLA/SrYO₃) nanocomposite films were successfully fabricated by the solution casting method with SrYO₃ loadings of 0.5–4 wt%. X-ray diffraction analysis confirmed enhanced crystallinity with increasing nanofiller concentration, while SEM images revealed uniform dispersion of SrYO₃ nanoparticles up to 2 wt%. FTIR spectra indicated strong interfacial interactions between PLA and SrYO₃ without chemical bond formation. Optical studies showed a reduction in the direct optical band gap from 5.03&#xa0;eV (pure PLA) to 4.72&#xa0;eV (4 wt% SrYO₃), accompanied by increased optical conductivity. Dielectric investigations demonstrated an increase in dielectric constant and AC conductivity with filler content and temperature, reaching optimal performance at 2 wt% SrYO₃. These results suggest that PLA/SrYO₃ nanocomposites are promising candidates for optoelectronic and dielectric applications.</p>

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Optical and electrical characterization of poly (lactic acid) films embedded with strontium yttrium oxide nanocomposites

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • S. Shruthi,
  • Vinayakprasanna Narayana Hegde,
  • Bhuvan M Lokesh,
  • P. Mallu,
  • N. Sandhya Rani

摘要

In this work, poly (lactic acid)/strontium yttrium oxide (PLA/SrYO₃) nanocomposite films were successfully fabricated by the solution casting method with SrYO₃ loadings of 0.5–4 wt%. X-ray diffraction analysis confirmed enhanced crystallinity with increasing nanofiller concentration, while SEM images revealed uniform dispersion of SrYO₃ nanoparticles up to 2 wt%. FTIR spectra indicated strong interfacial interactions between PLA and SrYO₃ without chemical bond formation. Optical studies showed a reduction in the direct optical band gap from 5.03 eV (pure PLA) to 4.72 eV (4 wt% SrYO₃), accompanied by increased optical conductivity. Dielectric investigations demonstrated an increase in dielectric constant and AC conductivity with filler content and temperature, reaching optimal performance at 2 wt% SrYO₃. These results suggest that PLA/SrYO₃ nanocomposites are promising candidates for optoelectronic and dielectric applications.