Abstract
Chitosan is used to treat cotton fabrics to impart antibacterial activities. The effect of concentration, molecular weight, and degree of deacetylation of chitosan on antibacterial , activity to Escherichia coli and the Hay bacillus is investigated. Bacteria reduction is evaluated using the modified Quinn method. Escherichia coli is effectively inhibited at 0.3 g/l chitosan solution and the Hay bacillus at 0.5 g/l. To bond chitosan to fabric chemically, glutaric dialdehyde is chosen as the crosslinking agent. Cotton fabrics treated with glutaric dialdehyde and chitosan show a good ability to inhibit bacteria reproduction. IR spectra of the surface of cotton fabrics and SEM pictures of fibers are presented.
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