Development of a novel method for investigation the uptake behaviors of acid dye on silk fabric at various flow statuses in a coloration circular pipe

Abstract

A novel methodology and a special fluid dynamics coloration machine were successfully constructed, and then the uptake behaviors of an acid dye on silk fabric under different flow statuses and parameters were explored for the first time. The obtained results show that the traditional additions of auxiliaries will not significantly change the kinematic viscosity of the dyeing bath. As coloration flow status was in laminar, transitional and turbulent flow, respectively, the dye uptake behaviors on the silk fabric were significantly different. Meanwhile, decreasing the bath pH value and increasing the temperature of the dyeing bath had a significant positive effect on the dye uptake behaviors in different flow statuses. Additionally, coloration in laminar or transitional flow preferred a relatively low dosage of neutral salt, which benefits to a cleaner production. Additionally, high coloration performance with color-fastness to washing and rubbing of the dyed silk at 4-grade or above was achieved under different flow statuses. The results further clearly indicate that the constructed method and self-built fluid dynamics coloration machine are helpful to investigate dye uptake behavior in different flow statuses, and are potentially beneficial to an efficient process and parameters design for cleaner production in textile coloration.

Keywords

• Uptake behavior
• Coloration methodology
• Flow status
• Fluid dynamics coloration machine
• Silk fabric
• Acid dye