Dyeing behaviors of ionic liquid treated wool

摘要

In this article, a new class of "green" solvent-ionic liquid (IL) was employed to improve the dye- ability of wool. The physical and chemical properties of the IL-treated wool, such as surface morphology, wettability, and tensile strength were first analyzed, and then the dyeing properties of IL-treated wool were investigated in terms of dyeing rate, dyeing exhaustion at equilibrium, color depth, and color fastnesses. The scanning electron microscope (SEM) images showed eroded marks on IL-treated wool fiber surfaces. The water contact angle of the fabric treated with IL at 100°C decreased from 118.6° to 106.4°. The tensile strength of IL-treated wool fibers was slightly decreased when the treating temperature was less than 100°C. Dyeing kinetics experiments revealed that the IL treatments greatly increased initial dyeing rate, shortened half-dyeing time, and time to reach dyeing equilibrium. The final exhaustion and color depth of IL-treated wool were also increased accompanying with slightly decreased color fastness.