Antibacterial efficacy of cotton fabrics chemically modified by metal salts

摘要

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 acidconcentrations 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.