The antibacterial activity of cotton fabrics chemically modified by some metal salt (metal ions) such as Cu
2 +, Fe
2 +, Fe
3 + and Zn
2 + was investigated. The increase of the amount of adsorbed metal and the increase of anhydrous succinic acid concentrations was correlated. Zn
2 + ion-adsorption was the highest, followed by Fe
2 +, Cu
2 + and Fe
3 + with the same amount of anhydrous succinic acid. The antibacterial activity of Cu
2 +-treatment against
Staphylococcus aureus was the most effective. Zn
2 +-treatment possessed a great antibacterial activity against
S. aureus even when the amount of adsorbed metal was the lowest. Cotton fabric treated with Cu
2 + possessed the most effective antibacterial activity against
Klebsiella pneumoniae and that treated with Zn
2 +, Fe
2 + and Fe
3 + possessed a slight antibacterial activity. The antibacterial activity of 4 kinds of metal-treated fabrics was higher than that of commercial antibacterial and deodorant fabrics, when the amounts of anhydrous succinic acid used was more than 1.0 g/g fabric. In particular, the Cu
2 +treatment on cotton fabrics was more effective than that of commercial treatments. These findings suggest that antibacterial activity could be improved by treatment with metal salt on cotton fabrics.
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