The Antibacterial Activities of Ag/Nano-TiO2 Modified Silicone Elastomer

L.L. Wanga, T. Sunb, S.Y. Zhoua and L.Q. Shaoa aDepartment of Stomatology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China bThe Medical Centre of Stomatology, the 1st Affiliated Hospital of Jinan University, Guangzhou 510630, China

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We studied the ability of Ag/nano-TiO2 to inhibit Staphylococcus aureus growth on silicone elastomer material. Ag/nano-TiO2 silicone elastomer was prepared with different concentrations of 0%, 2%, 4%, 6%, 8%, 10%. The antibacterial efficacy of Ag/nano-TiO2 silicone elastomer was determined by the inhibition zone method and the impregnated culture method. The antibacterial timeliness of Ag/nano-TiO2 silicone elastomer was tested by direct contact method. The samples were kept through thermal aging process in an accelerated aging chamber. The effect of concentrations of Ag/nano-TiO2 was insignificant (P < 0.05). There was significant difference between the Ag/nano-TiO2 silicone elastomer and the blank silicone elastomer (P < 0.5). There was also significant difference among specimen groups whose aging periods were 50°C, 100°C, 150°C, 200°C for 87 h (P < 0.5). The silicone elastomer with different concentrations of Ag/nano-TiO2 effectively inhibits Staphylococcus aureus growth.

DOI: 10.12693/APhysPolA.125.248 PACS numbers: 78.67.Bf