Influence of protease on dyeing of wool with acid dyes

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

doi:10.2478/s11532-010-0133-9

Cited by 11 publications

(7 citation statements)

References 18 publications

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“…The smoothness of the mordaned yarns were decreased due to the formation of non-planar molecules on the surface of yarns. [30][31][32] Periolatto et al 33 investigated the SEM results of dyed wool fibers. From the SEM results, it can be seen that there is no marked damage on the fibers in the treated sample.…”

Section: Identification Of Mordanted And/or Dyed Yarnsmentioning

confidence: 99%

The effect of ultrasound on environmentally extraction and dyeing of wool yarns

Hosseinnezhad

Gharanjig

Adeel

et al. 2022

Journal of Engineered Fibers and Fabrics

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Reducing pollution in various industries such as textile is very important. In this paper, two parallel methods were used to reduce pollution of the process and application of dye. The first approach was the selection of plant-based dyes (Madder with the botanical name of Rubia tinctorum and Reseda with botanical name of Reseda odorata) and the application of a tannin-based mordant (pomegranate peel with botanical name of Punica granatum). The second approach was extraction and dyeing in ultrasound media. The extraction efficiency of madder, Reseda, and pomegranate peel in water with the ultrasound-assisted method was 23%, 33%, and 29%, respectively. In this paper, the meta-mordanting method was used for mordanting procedure, and to compare the results, Cu (copper) was selected as the mineral mordant. Extracts were identified by FTIR method. Yarns’ changes in the process of mordanting and dyeing are investigated using two methods, FTIR and SEM. The effect of changing the concentration of mordant and dyes with the amount of K/S were evaluated and the K/S value of dyed samples illustrated that increasing the dye concentration of the dye increases the amount of K/S. The color fastness properties of all samples were investigated using the ISO standards.

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Section: Identification Of Mordanted And/or Dyed Yarnsmentioning

confidence: 99%

The effect of ultrasound on environmentally extraction and dyeing of wool yarns

Hosseinnezhad

Gharanjig

Adeel

et al. 2022

Journal of Engineered Fibers and Fabrics

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“…Conventional wool dyeing processes are performed at high temperatures and for long periods of time. The risk of damage to the fibre by the effect of high temperature and the inability to achieve the desired effect has led to new searches 1 . Enzymes as biocatalysts have gained considerable acceptance in various industries due to their substrate specificity and green chemistry.…”

Section: Introductionmentioning

confidence: 99%

“…It has been determined that it provides 77% affinity in dyeing performed at the same temperature without enzymatic pretreatment. Amongst improving dyeability, the enzymatic treatment helps to preserve the dimensional stability properties with high fastness performances 1 . However, high cost and lack of long‐term stability under storage and processing conditions have generally hindered their application 2,3 …”

Section: Introductionmentioning

confidence: 99%

“…The risk of damage to the fibre by the effect of high temperature and the inability to achieve the desired effect has led to new searches. 1 Enzymes as biocatalysts have gained considerable acceptance in various industries due to their substrate specificity and green chemistry. The use of enzymes specifically for textile processing is recognised for their ability to replace traditionally used harsh chemicals and save water and energy.…”

Section: Introductionmentioning

confidence: 99%

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Eco‐friendly approach on wool pretreatment and effect on the wool structure and dyeability

Türkoğlu

Avcı

Erkan

et al. 2022

Coloration Technology

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This research investigated the effect of various proteolytic enzymatic pretreatment on morphological and chemical features and the dyeability properties of wool fibres. Scoured merino wool fibres are treated with protease, papain, trypsin, and pepsin in specified conditions. Each enzyme activity measurement was provided by appropriate methods such as Bradford, BAPNA (N-benzoyl-1-arginine-p-nitroanilide), and BSA (Bovine Serum Albumin). Enzymatic processes were carried out for 24 h in the incubator set at 40 C, 100 rpm, and specified pH with 1 mg/ml enzyme concentration. Whiteness index (Stensby) and yellowness index (ASTM D 1925) were examined after enzymatic pretreatment. Pepsin and trypsin-treated wool fibres showed the highest whiteness index as 61.3 and 61.1, respectively whilst untreated wool fibres had 52.2. Fourier-transform infrared (FTIR) analysis revealed the increase in the intensity of amide-related bands and hydroxyl bands after enzymatic treatment.Scanning electron microscopy (SEM) photomicrographs manifested the cuticle layer is partially removed in enzyme-treated fibres. Elemental identification was provided by SEM-energy-dispersive X-ray spectroscopy (EDX). It appears that the sulphur bonds decreased after the treatment and the pepsin-treated fibres have fewer bonds of all. To examine the damage to the structure, photomicrographs were taken using fluorescence and light microscopes. The alkali solubility test (ASTM D1283) was also conducted to compare different enzyme types. Wool fibres were dyed in 2.0% concentration with reactive dyestuff. Dyeability and colorimetric features of fibres were measured by a spectrophotometer. The washing fastness test showed that all the samples have good results and the colour change after washing was better in enzyme-treated samples (grade 5) compared to untreated wool fibres (grade 4-5).

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“…Model tapestries, modern surrogates, have also been used as a means of reproducing typical damage under accelerated ageing regimes, although it has so far proved impossible to recreate the extreme damage seen in historic tapestries (Duffus, 2013). Much research on the physical and chemical properties of yarns and fibres used in textile manufacture has been carried out (Dubro, 1987;Montazer et al, 2011;Periolatto et al, 2011), but processing, spinning, and dyeing would have affected the individual properties of yarns used in the past. The research reported here aimed to seize the valuable opportunity of a contemporary major tapestry weaving project, the creation of a set of tapestries for Stirling Castle, to capture information on the properties of the wool yarns used in the weaving.…”

Section: 'Monitoring Of Damage To Historic Tapestries' (Modht)mentioning

confidence: 99%

Mechanical properties of wool and cotton yarns used in twenty-first century tapestry: Preparing for the future by understanding the present

Smith

Flowers

Lennard

2014

Studies in Conservation

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The conservation of historic tapestries is a complex and highly skilled task. Tapestries now being woven will need conservation in years to come. Can we, by understanding the properties of these contemporary works, assist the conservators of the future? The recreation of the Hunt of the Unicorn tapestries being undertaken by the West Dean Tapestry Studio offers a unique opportunity to access the materials being used and to create a body of data on their initial properties. This study uses tensile testing of the warp and weft materials to determine their maximum load at break, extension at maximum load, and specific stress (tenacity). Wool weft yarns from two different sources and of two thicknesses were examined. These wools were dyed 'in house' and the effect of the different dyes used was also assessed. These parameters all showed some significant (P < 0.05) differences. Cotton warp yarns of differing thickness and a gold thread were also tested. The comparison of how cotton and wool break demonstrates that when a tapestry is put under sufficient stress the cotton will snap but the wool may only stretch. However, this could often be beyond its recovery range resulting in a failure to return to shape.

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Influence of protease on dyeing of wool with acid dyes

Abstract: Abstract:© Versita Sp. z o.o.

Cited by 11 publications

References 18 publications

The effect of ultrasound on environmentally extraction and dyeing of wool yarns

The effect of ultrasound on environmentally extraction and dyeing of wool yarns

Eco‐friendly approach on wool pretreatment and effect on the wool structure and dyeability

Mechanical properties of wool and cotton yarns used in twenty-first century tapestry: Preparing for the future by understanding the present

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