Abstract
This study examines the dye uptake ability and mordanting effects of chitosan and nano silver composite non-woven fabrics dyed with an extracted solution from Caesalpinia sappan. L. The effects of mordants (alum, iron) on the color of dyed chitosan and nano silver composite non-woven fabrics were measured by L<SUP>*</SUP>, a<SUP>*</SUP>, b<SUP>*</SUP>, ΔE and H V/C values. In the undyed group, as the chitosan and nano silver percentage grew, the a<SUP>*</SUP> values and b* values increased and the L<SUP>*</SUP> values decreased. In the dyed group, ΔE values of chitosan and nano silver composite non-woven fabrics were higher than ΔE values of 100% cotton non-woven fabrics. As the chitosan and nano silver content increased (from 5% → to 10%, → to 30%), they became darker, more red and more blue. Mordants treatment influenced the color difference and color change of the dyed fabrics. Among the mordants, the effect of alum on color change of the dyed non-woven fabrics was the smallest, and the color difference achieved with alum was less than that with iron. The dyed non-woven fabrics were colored red and violet by mordant treatment, with alum and iron. Caesalpinia sappan. L. confirmed that these could be polygenetic colors. The dye uptake ability of 100% cotton non-woven fabrics and chitosan and nano silver composite non-woven fabrics was increased by mordant treatments.
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