Funct. Mater. 2026; 33 (2): 220-230.
Structure, thermophysical, thermomechanical and antimicrobial properties of film materials based on polylactide
1E.O. Paton Institute of Electric Welding, NAS of Ukraine,11, Kazymyr Malevich St., Kyiv,3150, Ukraine
2National University of Food Technologies,68, Volodymyrska St., Kyiv,1601, Ukraine
3D.K. Zabolotny Institute of Microbiology and Virology, NAS of Ukraine,154, Academician Zabolotny St., Kyiv,3143, Ukraine
4National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”,37, Peremohy Avenue, Kyiv,3056, Ukraine
The structural features, thermophysical and thermomechanical properties, and antimicrobial activity of polymer composites based on a mixture of polylactide-polycaprolactone polymers and Ag, Zn, or Ag/Zn nanoparticles were investigated. The formation of Ag, Zn, or Ag/Zn particles on the surface of the PLA-PCL polymer matrix was confirmed by X-ray diffraction analysis. It was established that the deposition of metal particles on the surface of the PLA-PCL polymer leads to a decrease in the temperature of the onset of thermal destruction: for silver by 6.5 °C, for zinc by 10.5 °C, and for Ag/Zn by 13.3 °C. According to DSC data, it was established that in PLA-PCL mixtures the influence of the PCL polymer component is manifested in the effect on the crystallization and melting of polylactide. It was found that when spraying Ag, Zn or Ag/Zn particles onto the surface of the PLA-PCL polymer matrix, the degree of crystallinity and melting temperature of the polymer matrix increase. PLA-PCL biopolymer film materials treated with Ag or Ag/ZnO nanoparticles by spraying for 3 and 5 minutes, demonstrated antimicrobial effect against S. aureus and E. coli and were inactive against B. subtilis and P. aeruginosa.