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Lili Yang,Zhenxiang Xu,Hongqi Li,Cuiying Wang,Yunqin Wang,Congcong Lu 한국섬유공학회 2021 Fibers and polymers Vol.22 No.4
A new dye intermediate and novel reactive dyes containing both azo and benzsulfonamide auxochromic groupswere synthesized. Their structures were characterized by 1H-NMR, 13C-NMR, MS, IR, and UV-Vis spectral analysis. Thesynthesized dyes were applied to dyeing of cotton fabrics and their dyeing parameters were assessed. The new dyes exhibitedimproved substantivity and fixation property on cotton fabrics compared with the dye C.I. Reactive Black 5 (RB5). Themaximum exhaustion and total fixation values of the reactive dyes appeared when 2 % owf of the dye concentration wasused. The wash fastness and rub fastness of the new dyes reached up to 4 grade and 4-5 grade, respectively. In addition, theyshowed excellent fastness to light. These new dyes seem to be promising candidates for application to dyeing of cotton fibers.