Kinetics of Ultrasonic Dyeing of PTT Fiber with Emodin

摘要

Comparative dyeing kinetics of poly (trimethylene terephthalate) fiber with emodin natural dyes using conventional and ultrasonic methods were studied in this paper. The plot of time/dye-uptake of both methods showed that the dye-uptake values of ultrasound dyed samples were obviously higher than those prepared by the conventional heating method. The values of dyeing rate constant,diffusion coefficient and half-time of dyeing and activation energy were calculated. The results showed that ultrasonic could evidently enhance the rate constant of dye progress,shorten half-dyeing time,increase the diffusion coefficients and decrease the activation energy,which positively indicated a favorable effect of ultrasonic power on the dyeing process.