DYEING PROPERTIES OF COTTON FIBERS TREATED WITH LIQUID-AMMONIA

Citation
T. Wakida et al., DYEING PROPERTIES OF COTTON FIBERS TREATED WITH LIQUID-AMMONIA, Journal of the Society of Dyers and Colourists, 111(5), 1995, pp. 154-158
Citations number
12
Categorie Soggetti
Materiales Science, Textiles","Chemistry Applied
ISSN journal
00379859
Volume
111
Issue
5
Year of publication
1995
Pages
154 - 158
Database
ISI
SICI code
0037-9859(1995)111:5<154:DPOCFT>2.0.ZU;2-W
Abstract
Both scoured and sodium hydroxide mercerised cotton fibres have been t reated with liquid ammonia at -33.4 degrees C using commercial operati ng equipment and then the ammonia removed at 130 degrees C in a hot dr um. The moisture regain and water absorbency of the fibres treated wit h liquid ammonia were increased compared with values on untreated fibr es, whereas both these parameters on mercerised cotton fibres were dec reased by subsequent liquid ammonia treatment. The fibres were dyed wi th Cl Direct Red 2 and Cl Direct Blue 1. Liquid ammonia treatment of t he scoured cotton fibres increased the rate of dyeing, equilibrium dye adsorption, standard affinity, heat of dyeing and change of entropy, while the dyeing properties of mercerised cotton were adversely affect ed by subsequent liquid ammonia treatment.