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Aminoddin Haji,Saba Ashraf,Majid Nasiriboroumand,Caroline Lievens 한국섬유공학회 2020 Fibers and polymers Vol.21 No.4
In this study, the effect of surface modification of wool fiber with oxygen plasma and chitosan (PC) on the colorstrength of the samples dyed with cochineal and safflower natural dyes has been studied. According to colorimetricmeasurements, plasma and chitosan treatments resulted in notable improvements in dyeability of wool fibers. The plasma andchitosan-treated wool sample could be dyed in less time and at lower temperature compared with untreated one. The dyebathpH had a prominent effect on color strength, which showed that the electrostatic force has an important role in dyeadsorption. The optimum pH for maximum dye absorption was 3.6. The fastness properties, tensile strength, and elongationat break of dyed wool were improved after PC treatment. Scanning electron microscopy (SEM) images and ATR-FTIRanalysis proved the coating of wool scales with a uniform thin layer of chitosan, which caused the improved dyeability ofwool fibers with safflower and cochineal.