The antibacterial activity of cotton fabrics chemically modified by some metal salt (metal ions) such as Cu 2 +, Fe 2 +, Fe3 + 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 Fe3 + 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 againstKlebsiella pneumoniae and that treated with Zn 2 +, Fe 2 + and Fe3 + 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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Nakashima et al. (2001) studied this question.
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