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Publications (10 of 20) Show all publications
Östlund, Å., de la Motte, H., Östmark, E., Wedin, H. & Sandin, G. (2018). Chemical Recycling of Textile Fibres (2ed.). In: Annie Gullingsrud (Ed.), Sustainable Fibre Toolkit 2018: (pp. 169-171). Stockholm: Stiftelsen Svensk Textilforskning
Open this publication in new window or tab >>Chemical Recycling of Textile Fibres
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2018 (English)In: Sustainable Fibre Toolkit 2018 / [ed] Annie Gullingsrud, Stockholm: Stiftelsen Svensk Textilforskning , 2018, 2, p. 169-171Chapter in book (Other academic)
Place, publisher, year, edition, pages
Stockholm: Stiftelsen Svensk Textilforskning, 2018 Edition: 2
Keywords
Textile fibres, sustainable fashion, fibre recycling, textile recycling, chemical recycling, Textilfibrer, hållbart mode, fiberåtervinning, textilåtervinning, kemisk återvinning
National Category
Engineering and Technology
Identifiers
urn:nbn:se:ri:diva-33902 (URN)
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2019-06-18Bibliographically approved
Gunnarsson, M., Bernin, D., Östlund, Å. & Hasani, M. (2018). CO2 capturing and the influence on cellulose dissolution in the NaOH(aq) system. In: 15th European workshop on lignocellulosics and pulp: Proceedings for poster presentations. Paper presented at 15th European workshop on lignocellulosics and pulp, June 26-29, 2018, Aveiro, Portugal (pp. 419-422).
Open this publication in new window or tab >>CO2 capturing and the influence on cellulose dissolution in the NaOH(aq) system
2018 (English)In: 15th European workshop on lignocellulosics and pulp: Proceedings for poster presentations, 2018, p. 419-422Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

The narrow dissolution window for cellulose in NaOH(aq) is a limiting factor in the production of regenerated cellulose materials, which is why understanding of the molecular interactions in this solvent system is of the highest importance. In this work, we highlight the interaction between cellulose and CO2 in NaOH(aq). The model compound methyl α-D-glycopyranoside (MeO-Glcp) was used to compare the difference of the dissolved state in NaCl(aq) and NaOH(aq), including both pre and post-dissolution addition of CO2. N MR a nd A TR-IR  spectroscopy as well as ocular observations were used in the evaluation.  1H and 13C NMR spectroscopy showed a clear change in chemical shift of the MeO-Glcp when dissolved in NaOH(aq) compared to NaCl(aq), which is a result of deprotonation. Interestingly, the addition of CO2 either pre or post-dissolution of MeO-Glcp in NaOH(aq) affected the chemical shifts differently (apart from the expected change in pH). With quantitative 13C NMR measurements, the uptake of CO2 was found to be more than twice as high when the CO2 was added post-dissolution of MeO-Glcp in NaOH(aq) compared to prior to dissolution. This suggests that specific interactions occur between CO2 and MeO-Glcp when the latter is dissolved prior to the addition of CO2, which could be attributed to the deprotonated state of MeO-Glcp. Furthermore, the dissolved state of cellulose in NaOH(aq) was visually shown to iffer in terms of pre or post-dissolution addition of CO2. Post-dissolution addition of CO2 resulted in the formation of a gelled structure when solutions was left to age in room temperature for two weeks. ATR-IR spectroscopy of materials regenerated from the aged solutions confirmed the introduction of a n ew waveband corresponding to CO2 out-of-phase stretching confirming the sorption of CO2 on cellulose when dissolved in NaOH(aq).

Keywords
cellulose, dissolution, NaOH(aq), CO2, NMR, ATR-IR
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-35321 (URN)
Conference
15th European workshop on lignocellulosics and pulp, June 26-29, 2018, Aveiro, Portugal
Available from: 2018-10-15 Created: 2018-10-15 Last updated: 2018-10-15Bibliographically approved
Wedin, H., Niit, E., Mansoor, Z. A., Kristinsdottir, A. R., de la Motte, H., Jönsson, C., . . . Lindgren, C. (2018). Preparation of Viscose Fibres Stripped of Reactive Dyes and Wrinkle-Free Crosslinked Cotton Textile Finish. Journal of polymers and the environment, 26(9), 3603-3612
Open this publication in new window or tab >>Preparation of Viscose Fibres Stripped of Reactive Dyes and Wrinkle-Free Crosslinked Cotton Textile Finish
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2018 (English)In: Journal of polymers and the environment, ISSN 1566-2543, E-ISSN 1572-8919, Vol. 26, no 9, p. 3603-3612Article in journal (Refereed) Published
Abstract [en]

The chemical recycling of cellulosic fibres may represent a next-generation fibre–fibre recycling system for cotton textiles, though remaining challenges include how to accommodate fibre blends, dyes, wrinkle-free finishes, and other impurities from finishing. These challenges may disrupt the regeneration process steps and reduce the fibre quality. This study examines the impact on regenerated viscose fibre properties of a novel alkaline/acid bleaching sequence to strip reactive dyes and dimethyloldihydroxyethyleneureas (DMDHEU) wrinkle-free finish from cotton textiles. Potentially, such a bleaching sequence could advantageously be integrated into the viscose process, reducing the costs and environmental impact of the product. The study investigates the spinning performance and mechanical properties (e.g., tenacity and elongation) of the regenerated viscose fibres. The alkaline/acid bleaching sequence was found to strip the reactive dye and DMDHEU wrinkle-free finish from the cotton fabric, so the resulting pulp could successfully be spun into viscose fibres, though the mechanical properties of these fibres were worse than those of commercial viscose fibres. This study finds that reactive dyes and DMDHEU wrinkle-free finish affect the viscose dope quality and the regeneration performance. The results might lead to progress in overcoming quality challenges in cellulosic chemical recycling. 

Keywords
Chemical textile recycling, Crosslinking agent, Decolourization, Easy-care, Reactive dye, Alkalinity, Bleaching, Cleaning, Crosslinking, Environmental impact, Mechanical properties, Recycling, Spinning (fibers), Textile fibers, Textile finishing, Textiles, Cross linking agents, Reactive dyes, Textile recycling, Cotton
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33886 (URN)10.1007/s10924-018-1239-y (DOI)2-s2.0-85046401795 (Scopus ID)
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2019-06-27Bibliographically approved
Englund, F., Wedin, H., Ribul, M., de la Motte, H. & Östlund, Å. (2018). Textile tagging to enable automated sorting and beyond: a report to facilitate an active dialogue within the circular textile industry.
Open this publication in new window or tab >>Textile tagging to enable automated sorting and beyond: a report to facilitate an active dialogue within the circular textile industry
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2018 (English)Report (Other academic)
Series
Mistra Future Fashion report ; 2018:1
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:ri:diva-33597 (URN)978-91-88695-29-1 (ISBN)
Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2019-06-18Bibliographically approved
Gunnarsson, M., Bernin, D., Östlund, Å. & Hasani, M. (2018). The CO2 capturing ability of cellulose dissolved in NaOH(aq) at low temperature. Green Chemistry, 20(14), 3279-3286
Open this publication in new window or tab >>The CO2 capturing ability of cellulose dissolved in NaOH(aq) at low temperature
2018 (English)In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 20, no 14, p. 3279-3286Article in journal (Refereed) Published
Abstract [en]

Herein, we explore the intrinsic ability of cellulose dissolved in NaOH(aq) to reversibly capture CO2. The stability of cellulose solutions differed significantly when adding CO2 prior to or after the dissolution of cellulose. ATR-IR spectroscopy on cellulose regenerated from the solutions, using ethanol, revealed the formation of a new carbonate species likely to be cellulose carbonate. To elucidate the interaction of cellulose with CO2 at the molecular level, a 13C NMR spectrum was recorded on methyl α-d-glucopyranoside (MeO-Glcp), a model compound, dissolved in NaOH(aq), which showed a difference in chemical shift when CO2 was added prior to or after the dissolution of MeO-Glcp, without a change in pH. The uptake of CO2 was found to be more than twice as high when CO2 was added to a solution after the dissolution of MeO-Glcp. Altogether, a mechanism for the observed CO2 capture is proposed, involving the formation of an intermediate cellulose carbonate upon the reaction of a cellulose alkoxide with CO2. The intermediate was observed as a captured carbonate structure only in regenerated samples, while its corresponding NMR peak in solution was absent. The reason for this is plausibly a rather fast hydrolysis of the carbonate intermediate by water, leading to the formation of CO3 2-, and thus increased capture of CO2. The potential of using carbohydrates as CO2 capturing agents in NaOH(aq) is shown to be simple and resource-effective in terms of the capture and regeneration of CO2.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-34482 (URN)10.1039/c8gc01092g (DOI)2-s2.0-85050451639 (Scopus ID)
Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-08-08Bibliographically approved
Wedin, H., Niit, E., Ahmad Mansoor, Z., Kristinsdottir, A. R., de la Motte, H., Jönsson, C., . . . Lindgren, C. (2017). Investigation of recycled viscose fibres after removal of a reactive dye combination and an easy care finish agent. In: : . Paper presented at Cellulosic material Properties and industrial potential – Final meeting in COST FP1205 March 7-9 2017, KTH Royal Institute of Technology, Stockholm, Sweden (pp. 78-79).
Open this publication in new window or tab >>Investigation of recycled viscose fibres after removal of a reactive dye combination and an easy care finish agent
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2017 (English)Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

Textile-to-textile recycling from cotton textiles can be done either mechanically or chemically. In chemical textile recycling of cotton there are challenges to overcome in order to regenerate new fibres. Two of the challenges among others are reactive dyes and wrinkle-free finishes that could disturb the regeneration process steps since these finishes are covalently linked to the cellulose.

This poster discusses the impact of using a novel alkaline/acid bleaching sequence to strip reactive dyes and wrinkle-free finish (DMDHEU) from cotton textile for production of regenerated viscose fibre properties. The results might generate a promising step forward to overcome quality challenges for cellulosic chemical recycling.

Keywords
decolorization, chemical textile recycling, recycled cotton, cellulose, crosslinking agent, wrinkle-free, reactive dye
National Category
Chemical Process Engineering Polymer Chemistry
Identifiers
urn:nbn:se:ri:diva-29277 (URN)
Conference
Cellulosic material Properties and industrial potential – Final meeting in COST FP1205 March 7-9 2017, KTH Royal Institute of Technology, Stockholm, Sweden
Projects
Mistra Future Fashion
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Available from: 2017-04-10 Created: 2017-04-10 Last updated: 2019-06-27Bibliographically approved
Östlund, Å., Westin, M. & Quistgaard, L. (2016). Mistra Future Fashion annual report 2015.
Open this publication in new window or tab >>Mistra Future Fashion annual report 2015
2016 (English)Report (Other academic)
Series
SP Rapport, ISSN 0284-5172 ; 2016:42
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-28218 (URN)978-91-88349-46-0 (ISBN)
Available from: 2017-02-17 Created: 2017-02-17 Last updated: 2018-07-05Bibliographically approved
Westin, M., Östlund, Å. & Sweet, S. (2015). Mistra Future Fashion Progress Report Covering June 2011-March 2015 (ed.). Paper presented at .
Open this publication in new window or tab >>Mistra Future Fashion Progress Report Covering June 2011-March 2015
2015 (English)Report (Refereed)
Publisher
p. 147
Series
SP Rapport, ISSN 0284-5172 ; 2015:20
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5252 (URN)20483 (Local ID)978-91-88001-50-4 (ISBN)20483 (Archive number)20483 (OAI)
Note

Version 2.1

Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2018-07-05Bibliographically approved
Östlund, Å., Wedin, H., Bolin, L., Berlin, J., Jönsson, C., Posner, S., . . . Sandin, G. (2015). Textilåtervinning: tekniska möjligheter och utmaningar (ed.). Paper presented at .
Open this publication in new window or tab >>Textilåtervinning: tekniska möjligheter och utmaningar
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2015 (Swedish)Report (Refereed)
Publisher
p. 115
Series
Rapport / Naturvårdsverket, ISSN 0282-7298
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-5650 (URN)28245 (Local ID)978-91-620-6685-7 (ISBN)28245 (Archive number)28245 (OAI)
Available from: 2016-09-08 Created: 2016-09-08 Last updated: 2019-06-27Bibliographically approved
Westin, M., Östlund, Å. & Schragger, M. (2014). Mistra Future Fashion Update April 2014 (ed.). Paper presented at .
Open this publication in new window or tab >>Mistra Future Fashion Update April 2014
2014 (Swedish)Report (Refereed)
Series
SP Arbetsrapporter ; 2014:25
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-3938 (URN)16481 (Local ID)16481 (Archive number)16481 (OAI)
Available from: 2016-09-07 Created: 2016-09-07 Last updated: 2018-07-05Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-1144-0602

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