Preparation and application of a β-cyclodextrin-disperse/reactive dye complex.

Autor: Stefania Parlati, Roberto Gobetto, Aldo Arrais, Claudio Medana, Piero Savarino
Zdroj: Journal of Inclusion Phenomena & Macrocyclic Chemistry; Apr2007, Vol. 57 Issue 1-4, p463-470, 8p
Abstrakt: Abstract  A disperse and a disperse/reactive azo-dyes were prepared and characterised with spectroscopic methods. The complexes with β-cyclodextrin were prepared by a dry milling method. The characterisation of the complexes in solid state was performed by 13C CP MAS NMR, FT-IR, Raman spectroscopies and TGA–DTA analysis. The presence of the complexes in solution was evidenced with ESI-MS experiments. The products were used to dye synthetic (nylon, PET), natural (cotton) and cotton-PET blend fibres. Colour intensity and uniformity were evaluated by means of tristimulous colorimetry. β-Cyclodextrin, used as additive in dyeing baths, enhanced the colour intensity and uniformity of dyed samples. The complexes gave rise to a generalised good result. The disperse/reactive dye showed better fastness to washing properties on nylon 6 and cotton fibres. β-Cyclodextrin easily substituted the surface active agents, normally used in industrially dyeing processes, without loss in dyeing quality as dyeing uniformity, intensity and washing fastness. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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