Breakage Characteristics of C. I. Disperse Red 60 Under an Ultrasound Field

The current study investigates the use of ultrasonic energy to provide a more efficient and eco-friendly mercerizing process. For both conventional and ultrasound-assisted techniques, the process variables, including sodium hydroxide concentration, reaction time, temperature, tensile strength and degree of mercerization, were modeled and compared by using the response surface methodology (RSM). The results revealed that the relationship between explanatory and response variables was similar in both techniques. However, there were greater changes for the ultrasonic-assisted treatment of samples. The optimum process parameters showed a lower alkali concentration in the mercerizing bath (≈17 %) and a higher tenacity (≈23 %) during the ultrasonic-assisted process, while the degree of mercerization was also higher in the same fibers. The study concluded that the ultrasound-assisted mercerization could be introduced as a more efficient alternative to the conventional mercerization process.

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Ultrasound-assisted mercerizing process of cotton fabric: A numerical model based on response surface methodology (RSM)

Khajavi

Berendjchi

Moghaddam

et al. 2015

Fibers Polym

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Ultrasound-assisted dyeing of cellulose acetate

Udrescu

Ferrero

Periolatto

2014

Ultrasonics Sonochemistry

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The possibility of reducing the use of auxiliaries in conventional cellulose acetate dyeing with Disperse Red 50 using ultrasound technique was studied as an alternative to the standard procedure. Dyeing of cellulose acetate yarn was carried out by using either mechanical agitation alone, with and without auxiliaries, or coupling mechanical and ultrasound agitation in the bath where the temperature range was maintained between 60 and 80 °C. The best results of dyeing kinetics were obtained with ultrasound coupled with mechanical agitation without auxiliaries (90% of bath exhaustion value at 80 °C). Hence the corresponding half dyeing times, absorption rate constants according to Cegarra-Puente modified equation and ultrasound efficiency were calculated confirming the synergic effect of sonication on the dyeing kinetics. Moreover the apparent activation energies were also evaluated and the positive effect of ultrasound added to mechanical agitation was evidenced by the lower value (48 kJ/mol) in comparison with 112 and 169 kJ/mol for mechanical stirring alone with auxiliaries and without, respectively. Finally, the fastness tests gave good values for samples dyed with ultrasound technique even without auxiliaries. Moreover color measurements on dyed yarns showed that the color yield obtained by ultrasound-assisted dyeing at 80 °C of cellulose acetate without using additional chemicals into the dye bath reached the same value yielded by mechanical agitation, but with remarkably shorter time.

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Breakage Characteristics of C. I. Disperse Red 60 Under an Ultrasound Field

Cited by 2 publications

References 6 publications

Ultrasound-assisted mercerizing process of cotton fabric: A numerical model based on response surface methodology (RSM)

Ultrasound-assisted mercerizing process of cotton fabric: A numerical model based on response surface methodology (RSM)

Ultrasound-assisted dyeing of cellulose acetate

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