Färben im Ultraschallfeld sowie aus überkritischem Kohlendioxid als alternativem Färbemedium

It was the aim of this work to increase the efficiency of the conventional dyeing process using ultrasonics or to replace the conventional dyeing medium water with supercritical carbon dioxide, saving water and energy costs to realize an ecological and also an economical profit. Using ultrasonics (approx. 10W/cm2) in a conventional dyeing process leads to a faster dyestuff consumption of the wool fibre, a deeper depht of shade and higfher levelness. The influence of the ultrasonic waves lead to a fester penetration of the wool fibre surface but no faster diffusion inside the fibre. No kind of ultrasonic-induced fibre damage could be detected. It could also be shown that it is possible to dye wool in deep shades and with high levelness and fastness properties in a water-free dyeing process using supercritical carbon dioxide instead of water. To match the fastness standards of today it is necessary to use fiber-reactive disperse dyes or mordant dyes on a pre-mordanted wool fabric. Small amounts of modifier are inevitable for deep shades and high levelness. It is possible to recycle the modifier with the carbon dioxide. The water-free dyeing conditions allow higher dyeings temperatures up to 120°C . Without any detectable wool fibre damage, this reduces the dyeing process for more than 30%.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2001

Author dc:creator

• Giehl, Andreas

Contributors dc:contributor

• Höcker, Hartwig

• info:eu-repo/classification/ddc/540
• Chemie
• Wolle
• Färben
• Ultraschall
• Kohlendioxid
• Überkritischer Zustand
• Lösungsmittel
• Überkritisches Gas

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-121363%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:59587