PHYSICAL PROPERTIES AND ANTIBACTERIAL ACTIVITY OF TiO2 NANOPARTICLES WITH POLYVINYL ALCOHOL/POLYVINYL PYRROLIDONE POLYMER

The structural properties which include X-ray diffraction (XRD) and scanning electron microscopy (SEM) of the polymer PVA/PVP and a mixture of polymer PVA/PVP with titanium dioxide with two particle sizes (45.7 and 15.7) nm have been studied. The absorption and transmission spectra of these films have been measured. The casting method was used to prepare films of PVA/PVP and this composite polymer with titanium dioxide with two particle sizes in plastic and glass plates in order to study the activity of these films to reduce bacterial growth. The antibacterial activity against pathogenic bacteria Staphylococcus aureus as gram positive bacteria and Escherichia coli as gram negative bacteria was tested. The results showed that the best reduction of S. aureus growth for TiO2 (15.7 nm)/PVA/PVP film on plastic plate reached to (62%) and on glass plates reached to (79.7%), while the best reduction of E. coli growth for TiO2 (15.7 nm)/PVA/PVP film on plastic plates reached to (84.7%) and on glass plates reached to (76%).