Indigo Dyeing of Cotton using Alkaline Catalase and                     Additives

Chakraborty, J.N.; Mazumdar, Pranav

doi:10.14504/ajr.7.s1.1

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…Several approaches to minimizing the impact of textile dyes on the environment have been published recently. One interesting study proposed changing the process of indigo dyeing of cotton without sodium hydrosulfite (Chakraborty 32 ). The hydrosulfite produced sulfate, sulfite, and thiosulfate ions with toxic effects.…”

Section: Discussionmentioning

confidence: 99%

Degradation of Synthetic Dyes with Plant-Produced Manganese Peroxidase and Commercial Laccase

Byrd

Hood

2022

AATCC Journal of Research

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Contamination of the environment directly impacts animal, plant, and human health, as well as agricultural production. A potential solution tested in this work incorporates the use of enzymes from fungi, manganese (Mn) peroxidase (MnP) and laccase, to degrade pollutants. Unfortunately, the MnP is too expensive to produce (more than US$24,000 per gram) to be used in remediation applications. MnP from a corn kernel biofactory can be produced in large amounts, and at <US$5 per gram, would be cost-effective in this application and resolve pollution issues. Two formulations of recombinant MnP from the corn kernel production system and commercial fungal laccase have been tested for degradation of synthetic dyes in an aqueous environment. Numerous concentrations of four synthetic azo or anthraquinone dyes were used. All dyes were partially or completely degraded by both enzymes.

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Section: Discussionmentioning

confidence: 99%

Degradation of Synthetic Dyes with Plant-Produced Manganese Peroxidase and Commercial Laccase

Byrd

Hood

2022

AATCC Journal of Research

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Hydrothermal extraction of microcrystalline cellulose from post-consumer indigo denim fabrics and evaluation of its UV blocking property

Sarmiento,

Aquino,

Balela

2024

IOP Conf. Ser.: Mater. Sci. Eng.

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Waste cotton clothes, including post-consumer denim fabrics, are abundant biopolymer sources due to their high cellulose content. These waste materials commonly end up in landfills, posing health and environmental concerns and losing valuable cellulosic materials. To address these, this study aims to extract and characterize microcrystalline cellulose (MCC) from post-consumer indigo denim fabrics using a one-step hydrothermal method and evaluate its UV-blocking properties. FTIR and TGA analysis of raw and bleached denim confirmed the presence and purity of cotton cellulose and the indigo dye. Extracted MCC yielded 70-84%, with a degree of polymerization (DP) of 281-299. XRD analysis of the MCC showed a cellulose Type I structure. FTIR suggests the removal of amorphous phases of cellulose, leaving the crystalline structure. SEM meanwhile revealed rod-shaped and rough-surfaced MCC particles with diameters of 10-20 μm and lengths of 45-60 μm. Both FTIR and SEM indicated the retention of indigo dye on MCC surface. Increased acid hydrolysis time led to smaller particle sizes and higher degree of crystallinity (CrI). Indigo PVA-MCC films showed good transparency and effective UV blocking. These results indicate the successful conversion of denim to MCC via the hydrothermal method and the stability of indigo dye in the cellulose matrix.

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Indigo Dyeing of Cotton using Alkaline Catalase and Additives

Cited by 2 publications

References 31 publications

Degradation of Synthetic Dyes with Plant-Produced Manganese Peroxidase and Commercial Laccase

Degradation of Synthetic Dyes with Plant-Produced Manganese Peroxidase and Commercial Laccase

Hydrothermal extraction of microcrystalline cellulose from post-consumer indigo denim fabrics and evaluation of its UV blocking property

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