Antibacterial activity of cotton fabrics treated with sulfadimidine azo dye/chitosan colloid

A series of sulfadimidine dyes has been synthesized via coupling of sulfadimidine diazonium salt with N-substituted anilines in acetic acid. This series was embedded in a chitosan colloid and applied to the surface of cotton fabric by using the pad-dry cure technique. The cotton fabric treated with sulfadimidine dye/chitosan was characterized by infrared spectra and scanning electron microscope images. The antibacterial activities of the prepared cotton fabric samples treated with chitosan and/or sulfadimidine dye/chitosan against Gram-positive bacteria (Staphylococcus aureus) and Gram-negative bacteria (Escherichia coli) were evaluated.