PIGMENT PRINTING OF COTTON FABRICS WITH CYCLODEXTRIN AND BIFUNCTIONAL REACTIVE DYE

Abstract

Beta-cyclodextrin, which has seven glucopyranose units, have ability to make inclusion complexes with the appropriate molecules that are called guest molecules. The inclusion complex occurs in the apolar cavity of beta-cyclodextrin therefore guest molecules should have the appropriate apolar groups and molecular size. Cyclodextrins can change the some properties of guest molecules, such as solubility, thermal behavior etc. Beta-cyclodextrin, has been preferred to use in various textile applications, such as insecticide, cosmetics, pharmaceutical agents, antibacterial agents, odour applications, and in dyeing as an auxiliary agent. However, a few studies are done using cyclodextrins in printing. Printing of pigment dyes with reactive printing paste using beta-cyclodextrin was investigated in this work. By this purpose, in the first step inclusion complexes were obtained by kneading method at various weight ratios of beta-cyclodextrin and pigments. Inclusion complexes were printed on cotton fabric by flat screen printing with using alginate based reactive printing paste. In the second step, pigments were printed by pigment printing paste with and without of cyclodextrin Reactive dye also was printed with and without cyclodextrin. Colorimetric values, colour strength fastness properties and stiffness peculiarities were investigated. The optimum complex forming weight ratio was found 1:2 for red, blue and mixture of pigments, and 1:3 for yellow pigment from colorimetric and colour strength values. Crocking fastness were improved by addition of inclusion complexes.

Keywords

• Fastness
• Printing
• Inclusioncomplex
• Colour strength
• CIEL*a*b*