Stabilization of natural and synthetic indigo on nanocellulose network - Towards bioactive materials and facile dyeing processes

Lohtander, Tia; Durandin, Nikita; Laaksonen, Timo; Arola, Suvi; Laaksonen, Päivi

doi:10.1016/j.jclepro.2021.129615

Cited by 9 publications

(4 citation statements)

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“…In a related work, Lohtander et al focuses on the stabilization of leucoindigo, the soluble form of natural indigo derived from Isatis tinctoria, on a nanocellulose carrier. 111 Typically, indigo dyeing necessitates complex conversion processes between its soluble and insoluble forms, often involving harsh chemicals. This work introduces an innovative approach where the leucoindigo form is stabilized on a nanocellulose matrix, avoiding the need for repeated re-reduction steps and harmful chemicals (Fig.…”

Section: Dye Technologymentioning

confidence: 99%

Transforming textile waste into nanocellulose for a circular future

Sathasivam,

Sugiarto,

Yew

et al. 2024

Nanoscale

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Section: Dye Technologymentioning

confidence: 99%

Transforming textile waste into nanocellulose for a circular future

Sathasivam,

Sugiarto,

Yew

et al. 2024

Nanoscale

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“…Table 1 provides some information on the alternatives for toxic chemicals. Tia et al 47 studied the stability of natural indigo; this research showed that the leuco form of indigo can be stabilized on a nanocellulose matrix carrier without the need for chemical agents, making the dye more ecologically safe to use on cellulosic materials.…”

Section: Greener Way To Produce Denimmentioning

confidence: 99%

Critical Review on Sustainability in Denim: A Step toward Sustainable Production and Consumption of Denim

Periyasamy

Periyasami

2023

ACS Omega

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The exponential development in knowledge on the health and environmental concerns linked to conventional denim processing is directly responsible for the continuous increase in demand for the exploitation of sustainable denim. Research is essential to explore alternative methods to reduce the environmental impact caused by these industries. This review examines the many sustainable ways to produce denim, keeping in mind the problems that the denim industry is now facing in finding alternatives to conventional manufacturing practices. The most current advancements in environmentally friendly dyeing techniques for denim have been extensively discussed. These processes include the production of indigo from bacteria as well as different dyeing processes, such as digital spray, microbially assisted dyeing, and foam dyeing denim with indigo. In addition, this review covers the many environmentally friendly finishing methods for denim garments, such as ozone fading, e-flow, enzyme-based bleaching, water, laser fading, and so on. Finally, it is described how the chemical and mechanical processes used to finish denim might affect the amount of microplastics and microfibers released from the denim garment during domestic washing. As a result, the content presented in this review aims to address the importance of sustainable denim processing, that is, something that can be rethought, reevaluated, renewed, and restructured within the scope of conventional denim processes, while taking eco-responsible solutions for increased environmental sustainability into account.

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“…16 This significant chemical discharge not only imparts severe contamination to aquatic ecosystems but also exerts enduring detrimental effects on soil integrity and the broader ecological balance. 17 Therefore, the development of indigo dye reduction processes that eliminate the reliance on toxic reducing agents is essential for advancing the sustainable practices within the textile industry. 18−23 Utilizing high surface area catalysts to facilitate electron transfer in electrochemical reduction is a promising strategy that has been successfully applied to numerous organic reactions.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Based on current industrial practices, the dyeing process for indigo denim fabric consumes approximately 2 t of the toxic and corrosive Na 2 S 2 O 4 per ton of fabric, with an estimated 60–70% of this amount being discharged into the environment . This significant chemical discharge not only imparts severe contamination to aquatic ecosystems but also exerts enduring detrimental effects on soil integrity and the broader ecological balance . Therefore, the development of indigo dye reduction processes that eliminate the reliance on toxic reducing agents is essential for advancing the sustainable practices within the textile industry. − …”

Section: Introductionmentioning

confidence: 99%

Vat Dye Molecule–Proton Dual Adsorption Catalysis Based on Molybdenum Disulfide for Sustainable Textile Dyeing

Wang,

Luo,

Ding

et al. 2024

ACS Sustainable Chem. Eng.

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The annual global output of denim exceeds a staggering 9 billion meters, valued at over $25 billion. The conventional production relies on sodium dithionite for indigo dye reduction, a costly process that also generates environmentally harmful wastewater with sulfite and sulfate ions. Addressing these issues, we present an eco-friendly, cost-effective electrochemical reduction approach using a novel molybdenum disulfide (MoS2) molecule–proton dual adsorption system for the electrocatalytic hydrogenation (ECH) of indigo dye. This system facilitates a phase shift from 2H to 1T in MoS2 by intercalating organic amine cations, enhancing the coadsorption of active hydrogen and indigo molecules, thereby boosting the ECH activity. The dimethylamine-cation intercalated MoS2 electrode material (MoS2-DMA-CF) achieves over 95% dye reduction efficiency and more than 75% faradaic efficiency in ECH, surpassing traditional methods with a 25% increase in K/S value, improved color fastness, and less than 5% color variation after 10 cycles. Additionally, this method reduces energy consumption by 92.424% and dyeing costs by 90.416%, with the dyeing wastewater exhibiting excellent biodegradability, offering substantial environmental benefits. This innovative approach not only yields significant cost savings but is also highly scalable, providing a sustainable solution for denim fabrication.

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Stabilization of natural and synthetic indigo on nanocellulose network - Towards bioactive materials and facile dyeing processes

Cited by 9 publications

References 50 publications

Transforming textile waste into nanocellulose for a circular future

Transforming textile waste into nanocellulose for a circular future

Critical Review on Sustainability in Denim: A Step toward Sustainable Production and Consumption of Denim

Vat Dye Molecule–Proton Dual Adsorption Catalysis Based on Molybdenum Disulfide for Sustainable Textile Dyeing

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