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Chemical Recycling of a Textile Blend from Polyester and Viscose, Part II : Mechanism and Reactivity during Alkaline Hydrolysis of Textile Polyester
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- Bengtsson, Jenny (author)
- RISE,Polymera material och kompositer,RISE Research Institutes of Sweden
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- Peterson, Anna (author)
- RISE,Polymera material och kompositer,RISE Research Institutes of Sweden
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- Idström, Alexander, 1983 (author)
- Chalmers University of Technology, Sweden,Chalmers tekniska högskola
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- de la Motte, Hanna (author)
- RISE,Polymera material och kompositer,RISE Research Institutes of Sweden
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- Jedvert, Kerstin (author)
- RISE,Polymera material och kompositer,RISE Research Institutes of Sweden
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(creator_code:org_t)
- 2022-06-06
- 2022
- English.
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In: Sustainability. - : MDPI. - 2071-1050. ; 14:11
- Related links:
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https://doi.org/10.3...
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Abstract
Subject headings
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- Chemical recycling of textiles holds the potential to yield materials of equal quality and value as products from virgin feedstock. Selective depolymerization of textile polyester (PET) from regenerated cellulose/PET blends, by means of alkaline hydrolysis, renders the monomers of PET while cellulose remains in fiber form. Here, we present the mechanism and reactivity of textile PET during alkaline hydrolysis. Part I of this article series focuses on the cellulose part and a possible industrialization of such a process. The kinetics and reaction mechanism for alkaline hydrolysis of polyester packaging materials or virgin bulk polyester are well described in the scientific literature; however, information on depolymerization of PET from textiles is sparse. We find that the reaction rate of hydrolysis is not affected by disintegrating the fabric to increase its surface area. We ascribe this to the yarn structure, where texturing and a low density assures a high accessibility even without disintegration. The reaction, similar to bulk polyester, is shown to be surface specific and proceeds via endwise peeling. Finally, we show that the reaction product terephthalic acid is pure and obtained in high yields. © 2022 by the authors.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Textil-, gummi- och polymermaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Textile, Rubber and Polymeric Materials (hsv//eng)
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
Keyword
- alkaline hydrolysis
- depolymerization
- peeling reaction
- polyester
- textile recycling
- alkalinity
- cellulose
- hydrolysis
- industrialization
- reaction kinetics
- reaction rate
- recycling
Publication and Content Type
- ref (subject category)
- art (subject category)
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