Antibacterial Activity against Staphylococcus aureus of Carbon Materials Dispersed with ZnO

抄録

Spherical and hard carbon particles containing ZnO at highly dispersed state were prepared by carbonizing an ion-exchange resin exchanged by Zn²⁺ ion. The antibacterial activity of as-prepared samples was studied by measuring the change in electrical conductivity with the growth of Staphylococcus aureus. From XRD measurements of carbonized resins, ZnO of hexagonal type was detected in the exchanged resin and no graphite was observed. The antibacterial activity of samples dispersed with ZnO increased with the concomitant increase of powder concentration, but no activity of samples without ZnO was observed, irrespective of powder concentration. From the comparison of the antibacterial activity for the prepared samples, it was clarified that the activity decreased with increasing the carbonizing temperature of an ion-exchange resin. The pH value after dispersing the samples containing ZnO in physiological saline was approximately 5.6. In the case of the sample without ZnO, however, the value was 9.1.