Abstract

Low-energy UV lamps were used for the pretreatment of wool yarns and its effects were investigated in terms of surface morphology, tensile strength, and percentage dye uptake. Subsequently, raw and UV-treated wool yarns were dyed with Cochineal dye and the essential parameters affecting the dyeing process (i.e., temperature, pH, duration) were determined. The results showed that the color strength of the samples increased by (a) increasing the pre-treatment effectiveness (i.e., UV irradiation strength and its duration), and (b) increasing the influential dyeing parameters (i.e., higher temperature, higher initial dye concentration in the dye bath, longer dyeing time, and acidic pH). The UV irradiation pretreatment also enhanced the color fastness properties of the dyed samples under the same dyeing conditions. The results suggested that an eco-friendly, acid-free, and relatively cheaper dyeing process could be developed for the wool fibers pretreated with scalable and straightforward UV irradiation pretreatment.

中文翻译：

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紫外线（UV）环保预处理对羊毛的染色特性和比色分析的影响

摘要

低能量紫外线灯用于羊毛纱的预处理，并从表面形态，拉伸强度和染料吸收率方面研究了其效果。随后，用Cochineal染料对原毛和经UV处理的羊毛纱线进行染色，并确定影响染色过程的基本参数（即温度，pH值，持续时间）。结果表明，通过（a）提高预处理效果（即UV辐照强度及其持续时间），以及（b）增加有影响力的染色参数（例如，较高的温度，较高的初始染料），可以提高样品的色强度。染浴中的浓度，更长的染色时间和酸性pH）。在相同的染色条件下，紫外线照射预处理还可以增强染色样品的色牢度。