Contemporary Revolutions in Natural Dyes: Extraction and Dyeing Methodology

Rehman, Fazal‐ur; Adeel, Shahid; Rafi, Sana; Habib, Noman; Zia, Khalid Mahmood; Zuber, Mohammad; Akhtar, Nasreen

doi:10.1002/9781119407850.ch8

Cited by 3 publications

(3 citation statements)

References 64 publications

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“…Their orientation leads to interfacial friction with other molecules and produces enormous amounts of heat. 47 This heat penetrates the dye material and enables the dye components to transfer from the dye bath and bond with the fabric. Heating levels at a particular point always accelerate the dye bath to an excessive extent consequently, the rate of the radiation & the rate of dyeing reach an equilibrium where the maximum fixation is observed, and excellent color strength is obtained.…”

Section: Resultsmentioning

confidence: 99%

A sustainable approach for linen dyeing and finishing with natural lac dye through chitosan bio-mordanting and microwave heating

Sayed

El-Bendary

Ahmed

2023

Journal of Engineered Fibers and Fabrics

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Sustainability has become a global requirement in all industries. In the textile sector sustainability can be achieved by developing innovative techniques, approaches, and machinery. The current study introduces a sustainable approach for linen dyeing with natural lac dye using microwave heating after the treatment with chitosan as a cationic bio-mordant. The chitosan treatment was carried out by a pad/dry-cure process with citric or acetic acid. Linen samples were characterized by scanning electron microscopy (SEM), and fourier transform infrared spectroscopy (FTIR). The results confirmed the deposition of chitosan on linen fabric with both citric and acetic acid. X-ray diffraction (XRD) was used to determine the change in the crystallinity of linen fabric after chitosan treatment and lac dyeing. The color strength results confirmed the successful application of chitosan as a bio-mordant and the efficiency of microwave heating in shortage the dyeing period in lac dyeing, where the K/S increased from 1.54 to reach 18.86 and 13 with acetic and citric acid, respectively in 7 min. Furthermore, the maximum color strength was achieved at pH 3 of lac dye and the presence of chitosan eliminated the usage of salt in the lac dyeing of linen fabrics. Fastness properties of the lac dyed linen fabrics to wash, light, and perspiration have been discussed. The functional properties (antibacterial activity and UV protection) of linen fabrics were assessed. The antibacterial activity was decreased after the chitosan-treated linen samples were dyed with lac dye. However, the UPF of linen samples was enhanced after lac dyeing.

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Section: Resultsmentioning

confidence: 99%

A sustainable approach for linen dyeing and finishing with natural lac dye through chitosan bio-mordanting and microwave heating

Sayed

El-Bendary

Ahmed

2023

Journal of Engineered Fibers and Fabrics

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“…Fastness ratings always depend upon the mode of dyeing, the nature of the colorant and the nature of the fabrics, as well as the nature of the mordants used. 35,36 Metal salts form a coordinate covalent bond onto the fabric before and after dyeing, due to which not only new shades are observed but also firm tints are shown with a good fastness rating. 9 However, biomordants, having polyphenolic moieties in their structure, form an extra H-bond with the fabric and dye functional group.…”

Section: Resultsmentioning

confidence: 99%

Sustainable ultrasonic dyeing of wool using coconut coir extract

Adeel

Kiran

Habib

et al. 2019

Textile Research Journal

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Due to an increasing awareness of the harmful effects of synthetic dyes among the global community, the demand for natural dyes in the textile sector has increased. The current study has been conducted to explore coconut coir, that is, Cocos nucifera, as a new dye yielding plant for wool dyeing under ultrasonic (US) radiation. Unirradiated and US-irradiated extracts of coconut coir were utilized to dye unirradiated and US-irradiated wool fabrics. To make the process more sustainable, acacia, henna, turmeric and pomegranate extracts as biomordants were used to dye wool fabric at 65℃ for 45 min. It was found that a good color yield was achieved by dyeing US-treated wool with US-treated acidic methanolic extract at 65℃ for 45 min. It is found that biomordanting profoundly added value in coloration and also enhanced the fastness rating of the dyed wool fabrics. It is concluded that US rays have excellent efficacy for exploring the coloring wealth of plants for dyeing of natural fabrics.

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“…Tekstil ve Konfeksiyon, 29(2), 181-186. used to enhance the color strength of dyed material and to increase the fastness properties and also produce plenty of shades. Commonly two types of mordants are used, first ones are metallic mordants (such as copper, Iron, alum and tannic acid) (9,10). Second ones are bio mordants (such as harmal, zeera, turmeric) (11,12).…”

Section: Introductionmentioning

confidence: 99%

Sustainable Utilization of Ultrasonic Radiation in Extraction and Dyeing of Wool Fabric Using Logwood (Haematoxylum Campechianum) Extracts

Adeel¹,

Azeem²,

Rehman³

et al. 2019

Tekstil Ve Konfeksiyon

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Environmental regulations imposed by world renowned associations have forced the global community to use eco-friendly and sustainable dyed products in applied fields. The current study has been concerned with the effect of ultrasonic radiation on the extraction of Hematein from logwood and its application onto wool fabric. Where the extraction was carried out by boiling respective amount of powder into methanolic medium, the extract obtained and wool fabrics were treated with ultrasonic radiation for 15, 30, 45 and 60 min. Dyeing of irradiated and un-irradiated fabric was carried out using irradiated and un-irradiated extracts at 70 o C for 45 min. keeping material to liquor ratio of 1:25. For improvement in shades, salts of aluminum, iron and tannic acid as chemical mordants and extracts of Zeera (Cuminum cyminum), Harmal(Peganumharmala) and Turmeric (Curcuma longa) as source of bio mordants have been employed at 70 o C for 45 min. keeping fabric to mordant ratio of 1:25. It is found that extract after Ultrasonic treatment (US) for 45 min. has given acceptable results. The colour strength results show that1% Al, 3%Fe, and 7% Tannic acid as pre-chemical mordants, where as before dyeing 7% of Zeera, Harmal and turmeric extracts have given excellent color coordinates, Similarly 1% Al, 7%Fe, and 7% Tannic acid as post-chemical mordants, where as after dyeing 3% of Zeera, 7% Harmal and 7% Turmeric have given good color characteristics at mild conditions. It is inferred that ultrasonic treatment has enhanced the coloring behaviour of wool using hematein extracted from logwood chips. ARTICLE HISTORY

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Contemporary Revolutions in Natural Dyes: Extraction and Dyeing Methodology

Cited by 3 publications

References 64 publications

A sustainable approach for linen dyeing and finishing with natural lac dye through chitosan bio-mordanting and microwave heating

A sustainable approach for linen dyeing and finishing with natural lac dye through chitosan bio-mordanting and microwave heating

Sustainable ultrasonic dyeing of wool using coconut coir extract

Sustainable Utilization of Ultrasonic Radiation in Extraction and Dyeing of Wool Fabric Using Logwood (Haematoxylum Campechianum) Extracts

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