Antibacterial Efficacy of Cotton Fabrics Chemically Modified by Metal Salts

抄録

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 againstKlebsiella 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.