日本金属学会誌
Online ISSN : 1880-6880
Print ISSN : 0021-4876
ISSN-L : 0021-4876
論文
光触媒抗菌試験条件がチタン基板上の大腸菌生存率に与える影響
坂本 広太小宮谷 真司高原 豊文住佐 太大津 直史
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2014 年 78 巻 4 号 p. 159-162

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  To evaluate the antibacterial performance of photocatalytic coating, Japan Industrial Standard (JIS) committee has suggested the standard testing conditions for quantitative evaluation. However, these conditions had been constructed based on the experimental consideration from the coating formed on a glass substrate. In this study, to check the applicability of the JIS conditions to the coating on a titanium (Ti) substrate, the change of the survival rate of Escherichia coli (E. coli) on the Ti surface was evaluated. We confirmed that the decrease of microorganisms caused by dryness and UV-light were effectively suppressed by the use of these conditions. Furthermore, when testing the antibacterial performance of an anodic TiO2 layer on a Ti substrate, its performance could be evaluated clearly. In conclusion, we confirmed that the survival rate of E. coli on the Ti substrate could be evaluated by using the experimental conditions described in the JIS.

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