STRUCTURAL AND LUMINESCENT CHARACTERISTICS OF LDPE MODIFIED WITH BIOFILLERS BASED ON FISH SCALES

• Shucayat Zeynalov

  Azerbaijan Technical University

  Author

• Sara Sadigova

  Author

• Vafa Salimova

  Author

• Ragib Damirov

  Author

• Davron Aslonqulovich Juraev

  Author

• Hardik Patel

  Author

Low-density polyethylene (LDPE)-based biocomposites containing fish scale (Fs) biofiller and iron nanoparticles were investigated with respect to their structural and photoluminescent properties. The composites were prepared with different concentrations of fish scale filler, while Fe nanoparticles were introduced as modifying additives to evaluate their influence on the optical behavior of the polymer matrix. X-ray diffraction (XRD) analysis demonstrated that thermal treatment of the fish scale biofiller increases its degree of crystallinity, indicating structural rearrangement and partial ordering of the organic-mineral components. Photoluminescence spectra of LDPE + x vol.% Fs and LDPE + x vol.% Fs + Fe composites were recorded under excitation at 342 nm. The obtained results revealed that the emission intensity strongly depends on the concentration of the biofiller and the presence of iron nanoparticles. An increase in fish scale content led to noticeable changes in the luminescence response of the composites, whereas incorporation of Fe nanoparticles caused a significant decrease in emission intensity. This effect is associated with enhanced nonradiative relaxation processes and possible energy transfer mechanisms induced by iron particles. The combined influence of the biofiller and metallic nanoparticles on the structural ordering and optical response of the composites was established. The developed LDPE-based biocomposites exhibit tunable luminescent characteristics and may be considered promising materials for functional polymer systems, optical coatings, and environmentally friendly polymer applications requiring controlled photoluminescent behavior.

1. Shucayat Zeynalov, Azerbaijan Technical University

   https://drive.google.com/drive/folders/1xWxLY2JDdaFLQnoALbK8N8GDru4ihF76?usp=sharing

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