Journal
JOURNAL OF NATURAL FIBERS
Volume 15, Issue 5, Pages 668-679Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15440478.2017.1354742
Keywords
Cationic agent; cotton; dyeing; mordant; natural dye; purple corncob
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In this investigation, dyeing of cotton fabric with natural dye extracted from purple corncob was attempted by means of pretreatment with a cationic agent, 3-chloro-2-hydroxypropyltrimenthylammonium chloride (CHTAC). Maximum color yield results were achieved when the fabric was pretreated with CHTAC at a concentration of 125g/L, followed by dyeing at 100 degrees C for 30min in a dye bath adjusted to pH 9. The influence of meta- and post-mordanting with AlK(SO4)(2), CuSO4, FeSO4, and gallnut was subsequently explored. Compared with the unmordanted sample, post-mordanting enhanced K/S values and slightly improved light fastness, but both meta- and post-mordanting caused a reduction in wash fastness from an excellent to a fair level, with the exception of CuSO4. Meanwhile, mordanting with gallnut increased the acid and alkaline perspiration fastness from a poor and fair to a good level.
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