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Mousa Sadeghi-Kiakhani,Siyamak Safapour,Fahimeh Sabzi,Ali Reza Tehrani-Bagha 한국섬유공학회 2020 Fibers and polymers Vol.21 No.1
Low-energy UV lamps were used for the pretreatment of wool yarns and its effects were investigated in terms ofsurface morphology, tensile strength, and percentage dye uptake. Subsequently, raw and UV-treated wool yarns were dyedwith Cochineal dye and the essential parameters affecting the dyeing process (i.e., temperature, pH, duration) weredetermined. The results showed that the color strength of the samples increased by (a) increasing the pre-treatmenteffectiveness (i.e., UV irradiation strength and its duration), and (b) increasing the influential dyeing parameters (i.e., highertemperature, higher initial dye concentration in the dye bath, longer dyeing time, and acidic pH). The UV irradiationpretreatment also enhanced the color fastness properties of the dyed samples under the same dyeing conditions. The resultssuggested that an eco-friendly, acid-free, and relatively cheaper dyeing process could be developed for the wool fiberspretreated with scalable and straightforward UV irradiation pretreatment.