Структура та електричні властивості антимікробних полімерних нано-композитів, наповнених вуглецевими нанотрубками та наночастинками срібла

The work investigated the structure, electrical conductivity and antimicrobial properties of polyethylene oxide-based nanocomposites modified with multi-walled carbon nanotubes (CNTs) and silver nanoparticles (AgNPs). X-ray diffraction analysis showed that the introduction of different types of fillers leads to a decrease in the degree of crystallinity of the polymer matrix. The greatest suppression of the crystallinity of the system was observed when filled with a hybrid filler. Impedance spectroscopy revealed a percolation behavior of electrical conductivity with the values of percolation transitions: 0.5% for CNTs, 1% for AgNPs and only 0.3% for the hybrid filler. Antimicrobial studies showed that hybrid composites are the most effective against S. aureus, E. coli and C. albicans, demonstrating inhibition zones up to 16 mm. The results obtained confirm the promising potential of combined nanofillers for creating functional materials with improved conductive and biocidal properties.