4.7 Article

Printing properties of the red reactive dyes with different number sulfonate groups on cotton fabric

期刊

CARBOHYDRATE POLYMERS
卷 101, 期 -, 页码 666-670

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ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.09.107

关键词

Cotton; Print; Reactive dyes; Affinity; Color yield

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Cellulose fabric is an important printing substrate. Four red azo reactive dyes based on 1-naphthol-8-amino-3,6-disulfonic acid for cotton fabric printing were designed. Their UV-Vis spectra and printing properties for cotton were investigated. The relationship between the chemical structures of the dyes and their printing properties on cotton fabric was discussed. The results show that the color yield (K IS) values of the printed fabrics decreased with the increase of sulfonate groups, but the fixation and penetration of the reactive dyes on cotton fabric increased. The reactive dyes with fewer number sulfonate groups were sensitive to alkaline and urea. Whereas, the reactive dyes with numerous sulfonate groups were not sensitive to urea and had good leveling properties, penetration uniformity, and good wet fastness for cotton fabric. Surface wettability of all cotton fabrics printed with four dyes was excellent. It is possible to print cotton fabric urea-free using the reactive dyes with numerous sulfonate groups. (C) 2013 Elsevier Ltd. All rights reserved.

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