Green Application of Isolated Colorant from Neem Bark for Mordant-Coated Wool: Optimization of Dyeing and Mordanting for Shade Development

This study aimed to assess the effectiveness of utilizing a tannin-based natural brown colorant from neem bark for dyeing wool under microwave treatment, specifically evaluating its coloring efficiency. The colorant was extracted in a methanol solution that had been acidified both before and after b...

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Bibliographic Details
Published in:Coatings (Basel) 2023-09, Vol.13 (9), p.1639
Main Authors: Adeel, Shahid, Zuber, Muhammad, Kınık, Mustafa, Zor, Aydın, Büyükkol, Semih, Kahraman, Ayşe Derya, Ozomay, Meral, Döl, Attila, Lehimler, Zafer, Khattak, Shahnaz Parveen
Format: Article
Language:English
Subjects:
Acidification
Bark
Carcinogens
Color
Coloring agents
Coloring matter
Composition
Computer simulation
Cosmetics
Dyeing
Dyes
Keratin
Margosa
Methanol
Methods
Mordant dyes
Natural products
Optimization
Properties
Radiation
Shades
Textiles
Wool
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Summary:This study aimed to assess the effectiveness of utilizing a tannin-based natural brown colorant from neem bark for dyeing wool under microwave treatment, specifically evaluating its coloring efficiency. The colorant was extracted in a methanol solution that had been acidified both before and after being subjected to microwave treatment for up to 6 min. The dyeing variables were optimized to create new shades of dye with desirable fastness properties, and sustainable chemical and bio-mordants ranging from 1 to 10 g/100 mL were employed. Through experimentation, it was determined that when an unirradiated acidic methanolic extract (AME) with a salt concentration of 3 g/100 mL was applied onto wool fabric (RWF) and subjected to microwave treatment for 4 min, it resulted in a high color yield. This was achieved by heating the solution to 65 °C and allowing it to remain in contact with the fabric for a duration of 65 min. Favorable color characteristics were achieved when utilizing a pre-chemical mordant of 5% Fe and a post-chemical mordant of 5% Fe. In contrast, the utilization of 7% henna as a pre-bio-mordant in combination with 3% turmeric extract as a meta-bio-mordant resulted in favorable color characteristics. The study concludes that microwave treatment exhibits outstanding sustainable efficacy in isolating colorants from neem bark powder for wool dyeing. Incorporating bio-mordants further enhanced the process’s sustainability and eco-friendliness.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13091639