Graft and Fixation of Modified Cationic Dye onto Cotton Fiber via ATRP and UV Method

Cotton cellulose is the most widely used natural polymers in various areas. Graft polymerization was attempted to introduce dyestuff onto cotton cellulose fiber for a trial on clean dyeing. A conventional free radical polymerization via UV initiation and a living radical polymerization via atom transfer radical polymerization method were used. Modified cationic dye with acrylic acid was grafted for coloring and an organosilane monomer was co-grafted for dye fixation. The chemical structure and morphology of grafted polymer of modified dye and organosilane were characterized. The color fastness and physical properties of grafted cotton cellulose were discussed. It is found that uniform organosilane film with moderate thickness formed via ATRP method was more beneficial to dye fixation with better color fastness. The original shape and typical convolutions of cotton fiber were reserved via ATRP method.