Improvement of Dyeability of Woolen Pile Used in hand-knotted Carpet Through Biocompatible Chitosan Derivative: Study on Dyeing and Fastness Properties using Weld natural dye

Safapour, S.; Sadeghi-Kiakhani, M.; Gharanjig, K.

Improvement of Dyeability of Woolen Pile Used in hand-knotted Carpet Through Biocompatible Chitosan Derivative: Study on Dyeing and Fastness Properties using Weld natural dye

Authors

¹ Carpet Faculty, Tabriz Islamic Art University

² Department of Organic Colorants, Institute for Color Science and Technology

³ Department of Organic Colorants;Center of Excellence for Color science and Technology, Institute for Color Science and Technology

Abstract

In this study, woolen pile used in hand-knotted carpet was modified through biocompatible chitosan derivative, namely, chitosan- polypropylene imine dendrimer (CS-PPI) hybrid, and then its dyeability and color fastness using weld natural dye were investigated. The impact of CS-PPI, dyeing pH and dye concentration on the dyeability of the substrates were then studied. According to the results, as the CS-PPI amount increased, the dyeability and color depth was considerably enhanced. In the case of modified wool, the amount of dye exhausted at pH 7 was markedly higher than that at pH 4 while no appreciable difference was observed for pristine wool dyeability with pH changes. Color strength (K/S) data were in the following order of the CS-PPI modified wool>Aluminium-mordanted wool>pristine wool. Modification of wool had no adverse impact on color fastness and even in some cases resulted in minor improvement in fastness properties. Overall, it was concluded that mordant and acid could be eliminated from natural dyeing through wool modification with biocompatible CS-PPI that is of great importance from ecological point of view.

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