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Guo, Z., Lindqvist, K. & de la Motte, H. (2018). An efficient recycling process of glycolysis of PET in the presence of a sustainable nanocatalyst. Journal of Applied Polymer Science, 135(21), Article ID 46285.
Open this publication in new window or tab >>An efficient recycling process of glycolysis of PET in the presence of a sustainable nanocatalyst
2018 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 135, no 21, article id 46285Article in journal (Refereed) Published
Abstract [en]

We demonstrate that the catalyst Perkalite F100 efficiently works as a nanocatalyst in the depolymerization of poly(ethylene terephthalate) (PET). After depolymerization of PET in the presence of ethylene glycol and the Perkalite nanocatalyst, the main product obtained was bis(2-hydroxylethyl) terephthalate (BHET) with high purity, as confirmed by Fourier transform infrared spectroscopy and NMR. The BHET monomers could serve directly as starting materials in a further polymerization into PET with a virgin quality and contribute to a solution for the disposal of PET polymers. Compared with the direct glycolysis of PET, the addition of a predegradation step was shown to reduce the reaction time needed to reach the depolymerization equilibrium. The addition of the predegradation step also allowed lower reaction temperatures. Therefore, the strategy to include a predegradation step before depolymerization is suitable for increasing the efficiency of the glycolysis reaction of PET into BHET monomers.

Keywords
catalysts, fibers, nanocrystals, nanoparticles, nanowires, polyesters, recycling, Ethylene, Ethylene glycol, Fourier transform infrared spectroscopy, Monomers, Pathology, Polyethylene terephthalates, Efficient recycling, High purity, Lower reaction temperature, Nano-catalyst, PET polymer, Poly(ethylene terephthalate) (PET), Terephthalate, Plastic recycling
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33399 (URN)10.1002/app.46285 (DOI)2-s2.0-85041650461 (Scopus ID)
Note

Funding details: MISTRA, Stiftelsen för Miljöstrategisk Forskning; Funding text: This work was financially supported by Mistra, the Swedish Foundation for Strategic Environmental Research.

Available from: 2018-03-08 Created: 2018-03-08 Last updated: 2019-07-05Bibliographically approved
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
de la Motte, H. (2018). Circular recycling of cotton fibers recovered from polyester/cotton textile blends. In: : . Paper presented at Circular Materials Conference.
Open this publication in new window or tab >>Circular recycling of cotton fibers recovered from polyester/cotton textile blends
2018 (English)Conference paper, Oral presentation only (Other academic)
National Category
Textile, Rubber and Polymeric Materials
Identifiers
urn:nbn:se:ri:diva-33598 (URN)
Conference
Circular Materials Conference
Available from: 2018-04-04 Created: 2018-04-04 Last updated: 2018-04-06Bibliographically approved
Giordanetto, F., Knerr, L., Nordberg, P. A., Pettersen, D., Selmi, N., Beisel, H. G., . . . Ahlqvist, M. (2018). Design of Selective sPLA2-X Inhibitor (-)-2-{2-[Carbamoyl-6-(trifluoromethoxy)-1 H-indol-1-yl]pyridine-2-yl}propanoic Acid. ACS Medicinal Chemistry Letters, 9(7), 600-605
Open this publication in new window or tab >>Design of Selective sPLA2-X Inhibitor (-)-2-{2-[Carbamoyl-6-(trifluoromethoxy)-1 H-indol-1-yl]pyridine-2-yl}propanoic Acid
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2018 (English)In: ACS Medicinal Chemistry Letters, ISSN 1948-5875, E-ISSN 1948-5875, Vol. 9, no 7, p. 600-605Article in journal (Refereed) Published
Abstract [en]

A lead generation campaign identified indole-based sPLA2-X inhibitors with a promising selectivity profile against other sPLA2 isoforms. Further optimization of sPLA2 selectivity and metabolic stability resulted in the design of (-)-17, a novel, potent, and selective sPLA2-X inhibitor with an exquisite pharmacokinetic profile characterized by high absorption and low clearance, and low toxicological risk. Compound (-)-17 was tested in an ApoE-/- murine model of atherosclerosis to evaluate the effect of reversible, pharmacological sPLA2-X inhibition on atherosclerosis development. Despite being well tolerated and achieving adequate systemic exposure of mechanistic relevance, (-)-17 did not significantly affect circulating lipid and lipoprotein biomarkers and had no effect on coronary function or histological markers of atherosclerosis.

Place, publisher, year, edition, pages
American Chemical Society, 2018
Keywords
atherosclerosis, carotid ligation, coronary artery disease, inhibitor, Secreted phospholipase A2 type X, sPLA2-X, 2 [2 [carbamoyl 6 (trifluoromethoxy) 1h indol 1 yl]pyridine 2 yl]propanoic Acid, propionic acid derivative, unclassified drug, animal experiment, animal model, Article, carotid artery ligation, controlled study, drug absorption, drug bioavailability, drug clearance, drug design, drug potency, drug selectivity, IC50, IC90, in vitro study, in vivo study, lipophilicity, male, mouse, nonhuman, plasma protein binding, priority journal
National Category
Chemical Engineering
Identifiers
urn:nbn:se:ri:diva-37293 (URN)10.1021/acsmedchemlett.7b00507 (DOI)2-s2.0-85049247977 (Scopus ID)
Note

Funding details: AstraZeneca

Available from: 2019-01-18 Created: 2019-01-18 Last updated: 2019-03-28Bibliographically approved
Ribul, M. & de la Motte, H. (2018). Material Translation: Validation and Visualization as Transdisciplinary Methods for Textile Design and Materials Science in the Circular Bioeconomy. Journal of Textile Design Research and Practice , 6(1), 66-68
Open this publication in new window or tab >>Material Translation: Validation and Visualization as Transdisciplinary Methods for Textile Design and Materials Science in the Circular Bioeconomy
2018 (English)In: Journal of Textile Design Research and Practice , ISSN 2051-1787, Vol. 6, no 1, p. 66-68Article in journal (Refereed) Published
Abstract [en]

This paper presents a textile design and materials science collaboration during two design residencies in a materials science laboratory for regenerated cellulose research. The first residency evidenced that both disciplines are connected through a materials practice in communication and production of materials. This paper presents the aims of design and scientific research in materials experimentation and the scale of materials in each discipline. The cross-disciplinary collaboration developed transdisciplinary methods for textile design and materials science towards circularity of materials in a bioeconomy. A model for material affinity highlights these two new approaches between the design vision of the textiles designer and scientific method in materials science: validation and visualization. The collaboration led to establishing cellulose-based films as a process that can be made in both the design studio and the science laboratory. This paper presents how textile design prototyping in the materials science laboratory during the second residency was informed by scientific method in a transdisciplinary method of validation. Scientific communication of research is here presented as adopting visualization methods from design. Translation is presented as a term for the design-science material experiments taking place in the science laboratory in the collaboration between the authors. Improved communication between technical scientists and textile designers is needed to achieve circularity of regenerated cellulose materials in the emerging bioeconomy. This paper addresses translation as a process taking place during textile design residencies in the material science laboratory. The material experiments improved cross-disciplinary communication at the convergence of scientific method, design vision, visualization and validation processes.

Keywords
design science, regenerated cellulose, transdisciplinary, circular bioeconomy, visualization, validation process
National Category
Chemical Sciences Design
Identifiers
urn:nbn:se:ri:diva-37688 (URN)10.1080/20511787.2018.1467206 (DOI)
Projects
Mistra Future Fashion
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Available from: 2019-01-31 Created: 2019-01-31 Last updated: 2019-02-08Bibliographically 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
de la Motte, H. & Palme, A. (2018). The development of the Blend Re:windprocess. Göteborg
Open this publication in new window or tab >>The development of the Blend Re:windprocess
2018 (English)Report (Other academic)
Place, publisher, year, edition, pages
Göteborg: , 2018. p. 14
Series
Mistra Future Fashion ; 2018:5
National Category
Chemical Sciences
Identifiers
urn:nbn:se:ri:diva-37690 (URN)978-91-88695-77-2 (ISBN)
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Available from: 2019-01-31 Created: 2019-01-31 Last updated: 2019-02-15Bibliographically approved
Palme, A., Peterson, A., de la Motte, H., Theliander, H. & Brelid, H. (2017). Development of an efficient route for combined recycling of PET and cotton from mixed fabrics. Textiles and Clothing Sustainability, 3(4)
Open this publication in new window or tab >>Development of an efficient route for combined recycling of PET and cotton from mixed fabrics
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2017 (English)In: Textiles and Clothing Sustainability, ISSN 2197-9936, Vol. 3, no 4Article in journal (Refereed) Published
Abstract [en]

Most textile waste is either incinerated or landfilled today, yet, the material could instead be recycled through chemical recycling to new high-quality textiles. A first important step is separation since chemical recycling of textiles requires pure streams. The focus of this paper is on the separation of cotton and PET (poly(ethylene terephthalate), polyester) from mixed textiles, so called polycotton. Polycotton is one of the most common materials in service textiles used in sheets and towels at hospitals and hotels. A straightforward process using 5–15 wt% NaOH in water and temperature in the range between 70 and 90 °C for the hydrolysis of PET was evaluated on the lab-scale. In the process, the PET was degraded to terephthalic acid (TPA) and ethylene glycol (EG). Three product streams were generated from the process. First is the cotton; second, the TPA; and, third, the filtrate containing EG and the process chemicals. The end products and the extent of PET degradation were characterized using light microscopy, UV-spectroscopy, and ATR FT-IR spectroscopy, as well as solution and solid-state NMR spectroscopy. Furthermore, the cotton cellulose degradation was evaluated by analyzing the intrinsic viscosity of the cotton cellulose. The findings show that with the addition of a phase transfer catalyst (benzyltributylammonium chloride (BTBAC)), PET hydrolysis in 10% NaOH solution at 90 °C can be completed within 40 min. Analysis of the degraded PET with NMR spectroscopy showed that no contaminants remained in the recovered TPA, and that the filtrate mainly contained EG and BTBAC (when added). The yield of the cotton cellulose was high, up to 97%, depending on how long the samples were treated. The findings also showed that the separation can be performed without the phase transfer catalyst; however, this requires longer treatment times, which results in more cellulose degradation.

Keywords
Polycotton, Textile recycling, Alkaline hydrolysis, Polycotton separation, Polyester recycling, Cotton recycling
National Category
Chemical Process Engineering Polymer Chemistry
Identifiers
urn:nbn:se:ri:diva-29275 (URN)10.1186/s40689-017-0026-9 (DOI)
Projects
Mistra Future Fashion
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Available from: 2017-04-10 Created: 2017-04-10 Last updated: 2018-07-06Bibliographically 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
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-6608-6842

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