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  • 1.
    Englund, Finn
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Wedin, Helena
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Ribul, Miriam
    London Doctoral Design Centre (LDoC), UK.
    de la Motte, Hanna
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Östlund, Åsa
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Textile tagging to enable automated sorting and beyond: a report to facilitate an active dialogue within the circular textile industry2018Report (Other academic)
  • 2.
    Gunnarsson, Maria
    et al.
    Chalmers University of technology, Sweden.
    Bernin, Diana
    Chalmers University of technology, Sweden.
    Östlund, Åsa
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Hasani, Merima
    Chalmers University of technology, Sweden.
    CO2 capturing and the influence on cellulose dissolution in the NaOH(aq) system2018In: 15th European workshop on lignocellulosics and pulp: Proceedings for poster presentations, 2018, p. 419-422Conference paper (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).

  • 3.
    Gunnarsson, Maria
    et al.
    Chalmers University of Technology, Sweden.
    Bernin, Diana
    University of Gothenburg, Sweden ; Chalmers University of Technology, Sweden.
    Östlund, Åsa
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Hasani, Merima
    Chalmers University of Technology, Sweden.
    The CO2 capturing ability of cellulose dissolved in NaOH(aq) at low temperature2018In: Green Chemistry, ISSN 1463-9262, E-ISSN 1463-9270, Vol. 20, no 14, p. 3279-3286Article in journal (Refereed)
    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.

  • 4.
    Jones, Dennis
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schmid, Joachim
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Opportunities within COST – A Swedish Perspective2014In: Proceedings of 10th Meeting of the Northern European Network for Wood Science & Engineering (WSE 2014), Edinburgh Napier University , 2014, , p. 192-197Conference paper (Refereed)
  • 5. Medronho, Bruno
    et al.
    Andrade, Raquel
    Vivod, Vera
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Miguel, Maria Graca
    Lindman, Björn
    Voncina, Bojana
    Valente, Artur
    Cyclodextrin-Grafted Cellulose: Physico-Chemical Characterization2013In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 93, no 1, p. 324-330Article in journal (Refereed)
  • 6.
    Wedin, Helena
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Niit, Ellinor
    Swedish School of Textiles, Sweden.
    Ahmad Mansoor, Zaheer
    re:newcell, Sweden.
    Kristinsdottir, Anna Runa
    RISE - Research Institutes of Sweden, Materials and Production, IVF.
    de la Motte, Hanna
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Jönsson, Christina
    RISE - Research Institutes of Sweden, Materials and Production, IVF.
    Östlund, Åsa
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Lindgren, Christofer
    re:newcell, Sweden.
    Investigation of recycled viscose fibres after removal of a reactive dye combination and an easy care finish agent2017Conference paper (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.

  • 7.
    Wedin, Helena
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Niit, Ellinor
    Swedish School of Textiles, Sweden.
    Mansoor, Z. Ahmad
    re:newcell AB, Sweden.
    Kristinsdottir, Anna Runa
    RISE - Research Institutes of Sweden, Materials and Production, IVF.
    de la Motte, Hanna
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Jönsson, Christina
    RISE - Research Institutes of Sweden, Materials and Production, IVF.
    Östlund, Åsa
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Lindgren, Christofer
    re:newcell AB, Sweden.
    Preparation of Viscose Fibres Stripped of Reactive Dyes and Wrinkle-Free Crosslinked Cotton Textile Finish2018In: Journal of polymers and the environment, ISSN 1566-2543, E-ISSN 1572-8919, Vol. 26, no 9, p. 3603-3612Article in journal (Refereed)
    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. 

  • 8.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Karlsson, Annelie
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Systemanalys.
    Quistgaard, Louise
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Energi och Bioekonomi, Systemanalys.
    Mistra Future Fashion annual report 20122013Report (Refereed)
  • 9.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update April 20142014Report (Refereed)
  • 10.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update December 20132013Report (Refereed)
  • 11.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update June 20122012Report (Refereed)
  • 12.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update June 20142014Report (Refereed)
  • 13.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update October 20122012Report (Refereed)
  • 14.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Schragger, Michael
    Mistra Future Fashion Update September 20132013Report (Refereed)
  • 15.
    Westin, Mats
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Östlund, Åsa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Sweet, Susanne
    Mistra Future Fashion Progress Report Covering June 2011-March 20152015Report (Refereed)
  • 16.
    Östlund, Åsa
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    de la Motte, Hanna
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Östmark, Emma
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Wedin, Helena
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Sandin, Gustav
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Chemical Recycling of Textile Fibres2018In: Sustainable Fibre Toolkit 2018 / [ed] Annie Gullingsrud, Stockholm: Stiftelsen Svensk Textilforskning , 2018, 2, p. 169-171Chapter in book (Other academic)
  • 17.
    Östlund, Åsa
    et al.
    Chalmers University of Technology, Sweden.
    Idström, Alexander
    Chalmers University of Technology, Sweden.
    Olsson, Carina
    Chalmers University of Technology, Sweden.
    Larsson, Per Tomas
    RISE, Innventia.
    Nordstierna, Lars
    KTH Royal Institute of Technology, Sweden.
    Modification of crystallinity and pore size distribution in coagulated cellulose films2013In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 20, no 4, p. 1657-1667Article in journal (Refereed)
  • 18.
    Östlund, Åsa
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Wedin, Helena
    Bolin, Lisa
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Energiteknik (ET).
    Berlin, Johanna
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Energiteknik (ET).
    Jönsson, Christina
    RISE - Research Institutes of Sweden, Materials and Production, IVF, Energi och miljö.
    Posner, Stefan
    RISE - Research Institutes of Sweden, Materials and Production, IVF, Energi och miljö.
    Smuk, Lena
    Eriksson, Magnus
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP - Sveriges Tekniska Forskningsinstitut, SP Trä.
    Sandin, Gustav
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Hållbar Samhällsbyggnad, Biobaserade material och produkter.
    Textilåtervinning: tekniska möjligheter och utmaningar2015Report (Refereed)
  • 19.
    Östlund, Åsa
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Westin, Mats
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Quistgaard, Louise
    RISE, SP – Sveriges Tekniska Forskningsinstitut.
    Mistra Future Fashion annual report 20152016Report (Other academic)
  • 20.
    Östlund, Åsa
    et al.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Östmark, Emma
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP Trä.
    Jones, Dennis
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, SP – Sveriges Tekniska Forskningsinstitut / Material och produkter (TRm).
    Scientific Programme and Book of Abstracts: Workshop Science and uses of nanocellulose & Cellulose foams and films. March 5-6, 20142014Report (Refereed)
1 - 20 of 20
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