RESEARCH ON MECHANICAL AND ANTI-BACTERIAL PROPERTIES OF NANOCOMPOSITE ON THE BASIS OF POLYLACTIC ACID (PLA) AND Ag/TiO2

Abstract

Nanocomposite materials are an area of interest to many scientists and science enthusiasts because of their
great potential. In this work, synthesis of nanoparticle hybrid Ag/TiO2 by using reducing agent method and
preparation of polymer nanocomposite were investigated and their properties were characterized. Analysis of
the characteristics of hybrid particles by modern physical methods such as XRD and TEM showed that hybrid
particles with Ag nanoparticles distributed on TiO2 have been synthesized. The antibacterial ability of the hybrid
particles showed that the sample has antibacterial ability with 3 strains of microorganisms. Successfully
fabricated antibacterial nanocomposite based on Ag/TiO2 and PLA. When adding hybrid particles, the physical
and mechanical properties of the material do not change much. Testing the bactericidal ability of
nanocomposites found that: Salmonella typhimurium (ATCC 14028) and E.coli ATCC 25922 had quite similar
bactericidal performance. The fully antibacterial ability of the materials was at nanoparticles hybrid content of
0.04%, while by S.aureus ATCC 25923 the nanoparticles hybrid content was 0.05%. The result indicated that the
antibactericidal ability of S.aureus ATCC 25923 is weaker.