Towards sustainable textile sector: Fractionation and separation of cotton/ polyester fibers from blended textile waste

Kahoush, May; Kadi, Nawar

doi:10.1016/j.susmat.2022.e00513

Cited by 15 publications

(11 citation statements)

References 88 publications

(103 reference statements)

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“…Another approach is breaking down cotton for separate polyester reuse or degrading polyester while preserving cotton cellulose for recycling. 10 However, polyester can only be dissolved in very strong solvents (such as hexafluoroisopropanol and benzene/tetrachloroethylene), 11,12 which further poses challenges in solvent recovery. The separation of blended fabrics via cellulose decomposing to retain polyester materials has garnered considerable attention from researchers, involving the use of 70−75% sulfuric acid and 85% phosphoric acid solutions for cellulose dissolution.…”

Section: Introductionmentioning

confidence: 99%

“…These methods involve dissolving cotton or polyester in the mixture, extracting the undissolved portion, and recovering the dissolved portion. Another approach is breaking down cotton for separate polyester reuse or degrading polyester while preserving cotton cellulose for recycling . However, polyester can only be dissolved in very strong solvents (such as hexafluoroisopropanol and benzene/tetrachloroethylene), , which further poses challenges in solvent recovery.…”

Section: Introductionmentioning

confidence: 99%

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Polyester/Cotton-Blended Textile Waste Fiber Separation and Regeneration via a Green Chemistry Approach

Yang,

Wang,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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To effectively recycle polyester/cotton-blended textiles in discarded clothing and enhance resource utilization, this work employs a low eutectic solvent [deep eutectic solvent (DES)] based on metal salt hydrates for the efficient separation of polyester/cotton blends. The DES is synthesized in a specific proportion from triple components, zinc chloride, water, and phosphoric acid. This solvent can selectively dissolve the cotton fibers in mixed textiles without damaging the polyester fiber component. Experimental results from Fourier infrared spectroscopy, X-ray diffraction, and thermal performance analysis suggest that the DES can accomplish efficient separation of polyester fibers and cotton fiber components, with no significant damage to the polyester fiber structure postseparation. Upon separation, the two components can be processed for regeneration and reuse: the separated cellulose can be dissolved again and processed through wet spinning to produce cellulose fibers, while the separated polyester fibers can further undergo melt spinning. This work provides new insights into the green and efficient separation and regeneration of polyester/cotton-blended textiles, potentially enhancing the recycling rate of waste textiles and reducing environmental pollution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Polyester/Cotton-Blended Textile Waste Fiber Separation and Regeneration via a Green Chemistry Approach

Yang,

Wang,

Wang

et al. 2024

ACS Sustainable Chem. Eng.

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“…The amount of textile waste in the world is increasing, and by 2030 it could reach as much as 148 million tons, which is 62 % more than in 2015. These figures indicate a large loss of resources, as textile waste is mostly nowadays incinerated or landfilled [3], [4]. The European Green Deal launched a new strategy to increase the role of the circular economy in all areas of business and to make a major contribution to achieving climate neutrality by 2050.…”

Section: Introductionmentioning

confidence: 99%

Decision-making Algorithm for Waste Recovery Options. Review on Textile Waste Derived Products

Zandberga

Kalnins

Gusca

2023

Environmental and Climate Technologies

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As the volume of textile waste steadily increases, mechanical, chemical and biological technologies for textile waste recovery are evolving. Also, the legal framework of the European Union has stated the commitments for promoting the recycling of textile waste in the Member States. So far, however, no decision-making algorithms have been developed for the selection of products recovered from textile waste. Within the present study, a hybrid multi-criteria decision-making algorithm for evaluating textile waste recovered products has been developed applying seven circular economic criteria – ‘Circular economy approach of the technology’, ‘Added-value potential of final product’, ‘Share of textile waste in total waste feedstock’, ‘Diversity of textile mix suitable for specific technology’, ‘Pre-treatment of waste feedstock’, ‘Recovery potential’ and ‘Maturity of a recovery technology’. The weighting of the criteria was determined by eight waste management experts. The results of the expert-based criteria evaluation show that the most important criteria are ‘Added-value potential of final product’ and ‘Circular economy approach of the technology’. The developed decision-making methodology has been adapted to nine textile waste recovered products – compost, refuse-derived fuel, ethanol, glucose, building insulation material from cement and textile waste mix, building insulation material from denim textile waste, terephthalic acid, recovered cotton and recovered polyester. The multi-criteria, decision-making ranking of the products textile shows that the highest potential for products recovered from textile waste is for glucose and terephthalic acid, while the lowest – for ethanol, compost and refuse-derived fuel.

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“…Among the industrial sectors, the textile sector ranks second in the world in terms of global carbon emissions (10%) and volume of wastewater (20%) [23]. Global fibre production has recently doubled, from 58 million tons in 2000 to 109 million tons in 2020 [24]. Approximately 63% of world consumption is synthetic fibres, 25% cotton, 7% and 5% wood, and other natural fibres [23].…”

Section: Introductionmentioning

confidence: 99%

“…However, only a tiny percentage of textile industry waste is reused or recycled worldwide [24]. For example, in the United States of America, only 15% of fibre waste is reused; in China and Japan, it is about 10% and 13%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Understanding and attitude toward upcycling according to the survey of students of various specialities

Derkach,

Bilianska,

Yaroshenko

2023

J. Phys.: Conf. Ser.

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The attitude to upcycling technologies of undergraduate students of five specialities (design, clothing industry technology, vocational education and training, industrial pharmacy and psychology) and their teachers was investigated using the questionnaire method. Students’ pReferences practically do not depend on specialities. For all students, subgroups of upcycling enthusiasts and sceptics are observed which regularly resort to upcycling or almost do not use it. An almost complete misunderstanding and imperception of the benefits and importance of upcycling is a key and common problem. Social factors have a minimal influence on the opinion of respondents, which may indicate a lack of understanding in society of the role and importance of waste management. All the shortcomings and problems in understanding upcycling are common to students and teachers. In general, the positive attitude towards upcycling and the intention to use upcycling in life in the answers most likely has an unconscious and artificial character (like a fashion trend) because the attitude towards other formative factors does not support it. The identified problems are related to the shortcomings of secondary school and undergraduate curricula, which hinder the formation of the necessary competencies for sustainable development. Methods of their solution are proposed and discussed.

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Towards sustainable textile sector: Fractionation and separation of cotton/ polyester fibers from blended textile waste

Cited by 15 publications

References 88 publications

Polyester/Cotton-Blended Textile Waste Fiber Separation and Regeneration via a Green Chemistry Approach

Polyester/Cotton-Blended Textile Waste Fiber Separation and Regeneration via a Green Chemistry Approach

Decision-making Algorithm for Waste Recovery Options. Review on Textile Waste Derived Products

Understanding and attitude toward upcycling according to the survey of students of various specialities

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