Antibacterial performance of nano-silver-zirconium phosphate antibacterial polyurethane
Polyurethane material has excellent physical and chemical performances, good biocompatibility and anti-clotting properties, and is easy to shape. However, artificial organs manufactured using the polyurethane are vulnerable to the invasion of bacteria and other microorganisms.
The polyurethane added with nano-silver base inorganic antimicrobial agents had a good antibacterial effect on Staphylococcus aureus and Escherichia coli.
The inhibitory rate against Staphylococcus aureus in the groups containing 0.5%-5% antimicrobial agents were 80.23%, 91.32%, 95.23%, 99.19%, 99.87% and 99.93%, respectively; the inhibitory rate against Escherichia coli in the corresponding groups were 76.70%, 86.96%, 92.92%, 95.43%, 99.34% and 99.87%, respectively.
The antimicrobial properties of polyurethane increased significantly with the increasing proportions of the antibacterial agents.
These results indicate that nano-silver base inorganic antimicrobial agents can endow the polyurethanes an excellent antibacterial property. From the antimicrobial perspective, the recommended adding proportion of the nano-silver base inorganic antimicrobial agents in the polyurethane is no less than 1.5%.