Enzyme‐aided wool dyeing with a neutral protease at reduced temperatures

Periolatto, Monica; Ferrero, Franco; Giansetti, Mirco; Mossotti, Raffaella; Innocenti, Riccardo

doi:10.1002/elsc.201000089

Cited by 24 publications

(10 citation statements)

References 15 publications

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“…There are many processes to dye wool fabric with acid dye. Many low-temperature wool dyeing processes have been proposed by the use of pretreatment and chemicals [4,5] and enzyme or plasma pretreatments [6][7][8]. McNeil and McCall [9] introduced that ultrasound gave potential to reduce the chemical and extra energy requirements in wool dyeing with reactive and acid milling dye.…”

Section: Introductionmentioning

confidence: 99%

Effect of ultrasound on dyeing of wool fabric with acid dye

Islam

Haque

et al. 2017

Int J Ind Chem

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Wool fiber strength and handle is damaged by holding for prolonged periods at normal dyeing temperatures (98°C). Lower dyeing temperatures can be employed to color wool whilst reducing damage caused to the fiber. However, these lower temperature dyeing processes often have a long dyeing time and/or require the addition of chemicals to achieve adequate dye exhaustion and migration. The use of ultrasonic irradiation was used to reduce dyeing times and temperatures whilst increasing dye migration and fastness. It has used 30 kHz frequency level, effective power of 120 and 350 W heating power in ultrasonic machine. In this work, wool dyeing was carried out on single jersey knitted fabric using an acid dye with and without ultrasonic irradiation at 60, 70, and 80°C. Dye exhaustion was measured using UV/visible absorbance of the dye bath before and during the dyeing cycle. For the measurement of nodal/anti-nodal point of energy, at 60, 70, and 80°C dyeing was done in open bath of ultrasonic machine with and without sonication at high liquor ratio. To compare the dye uptake (%) at high/conventional process, sample was dyed at 95°C. Optical and scanning electron microscopy were used to measure the diameter and surface changes of the fiber, respectively. Wash and rub fastness was measured on the dyed fabrics after rinsing and drying. Ultrasonic irradiation during the dyeing of wool caused an increase in the dye exhaustion rate for acid dye. This change in rate is believed to have been caused by a reduction in the viscous boundary layer of liquor surrounding the fiber present in an ultrasonic irradiated environment. An increased dye migration due to cuticle cracking and fiber swelling was not deemed to have occurred as wet fiber diameter was not changed by submersion in the dye liquor in the presence of ultrasound and no surface cracking was evident in scanning electron microscopy images. Some cuticle structure changes occurred with turning up or ripping off of the cuticle tips evident. Both wash and rub fastness were improved for ultrasonically dyed fiber with dyeing temperatures of 70 and 80°C being suitable for the low-temperature dyeing of wool.

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Section: Introductionmentioning

confidence: 99%

Effect of ultrasound on dyeing of wool fabric with acid dye

Islam

Haque

et al. 2017

Int J Ind Chem

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“…These chemicals increase the environmental impact of textile industry wastewater and could give allergies to end-user of the manufactured products. Hence, cleaner production methods in textile dyeing can be implemented by enzymatic treatments (Aly et al, 2004;Öner and Sahinbaskan, 2011;Periolatto et al, 2010), use of natural dyes (Mirjalili et al, 2011) or substitution of synthetic auxiliaries with products derived from natural sources (Moore and Ausley, 2004;Ozturk et al, 2009;Savarino et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Glycerol in comparison with ethanol in alcohol-assisted dyeing

Ferrero

Periolatto

2012

Journal of Cleaner Production

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“…On the other hand, to achieve the low‐temperature dyeing of wool, many endeavors have been made, such as liquid‐ammonia pretreatment, enzyme pretreatment, corona treatment, UV radiation, alkaline agent treatment, low‐temperature plasma pretreatment, the use of a microemulsion system, and microencapsulation . However, these dyeing methods at low‐temperature have not yet been used practically.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of acid dyes containing polyetheramine moieties and their low‐temperature dyeing properties on wool fiber

Wang

Zheng

et al. 2017

J of Applied Polymer Sci

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To realize the low-temperature dyeing of wool fibers, the use of auxiliaries and wool modification are common methods. Low-temperature auxiliaries may cause water-pollution problems, and wool modification is a costly and uncontrollable process. In this study, new acid dyes, named D1-D3, containing polyetheramine groups were synthesized and applied to wool fiber by conventional and low-temperature exhaust dyeing procedures. The results indicate that the new acid dyes could interact with wool-fiber-like auxiliaries and render a high exhaustion rate to the wool fiber at a dyeing temperature of 80 8C. In comparison with Acid Blue 25, the D1-D3 dyes showed an increased dyeing rate, especially under a dyeing temperature of 80 8C. Despite the bigger relative molecular masses of D1-D3, the exhaustion rates of D1-D3 were still higher, and the times of half-dyeing were shorter than that of Acid Blue 25. The color differences between the wool fabrics dyed with the four dyes at 80 and 98 8C, respectively, were compared. We found that the color differences of D1-D3 between 80 and 98 8C were smaller than that of Acid Blue 25. The interactions between the dyes and wool fiber were analyzed and manifested by the measurement of the f potential of the dyes and wool fiber. The leveling and transfer properties of the D1-D3 dyes were also investigated, and the color differences of the wool fabrics dyed with Acid Blue 25, D1, and D2 were very low at all measured pH values and temperatures. The fastnesses of D1-D3 on wool fabric were almost the same as that of Acid Blue 25.

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Enzyme‐aided wool dyeing with a neutral protease at reduced temperatures

Cited by 24 publications

References 15 publications

Effect of ultrasound on dyeing of wool fabric with acid dye

Effect of ultrasound on dyeing of wool fabric with acid dye

Glycerol in comparison with ethanol in alcohol-assisted dyeing

Synthesis of acid dyes containing polyetheramine moieties and their low‐temperature dyeing properties on wool fiber

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