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Jedvert, K., Idström, A., Köhnke, T. & Alkhagen, M. (2019). Cellulosic nonwovens produced via efficient solution blowing technique. Journal of Applied Polymer Science, Article ID 48339.
Open this publication in new window or tab >>Cellulosic nonwovens produced via efficient solution blowing technique
2019 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, article id 48339Article in journal (Refereed) Published
Abstract [en]

The demand for nonwoven materials has increased during the last few years and is expected to increase further due to its use in a broad range of new application areas. Today, the majority of nonwovens are from petroleum-based resources but there is a desideratum to develop sustainable and competitive materials from renewable feedstock. In this work, renewable nonwovens are produced by solution blowing of dissolved cellulose using 1-ethyl-3-methylimidazolium acetate (EMIMAc) as solvent. Properties of cellulose solutions and process parameters, such as temperature, flow rate, air pressure, and distance to collector, are evaluated in respect to spinnability and material structural properties. Nonwovens with fiber diameters mainly in the micrometer range were successfully produced and it was shown that high temperature or low flow rate resulted in thinner fibers. The produced materials were stiffer (higher effective stress and lower strain) compared to commercial polypropylene nonwoven. © 2019 The Authors. Journal of Applied Polymer Science published by Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48339. © 2019 The Authors.

Place, publisher, year, edition, pages
John Wiley and Sons Inc., 2019
Keywords
cellulose, nonwovens, solution blowing, Polypropylenes, 1-ethyl-3-methylimidazolium acetates, Cellulose solutions, Effective stress, Micrometer ranges, Non-wovens, Nonwoven materials, Process parameters, Renewable feedstocks, Nonwoven fabrics
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-39851 (URN)10.1002/app.48339 (DOI)2-s2.0-85070821248 (Scopus ID)
Note

Funding details: Svenska Forskningsrådet Formas, 942‐2015‐388; Funding text 1: The Swedish Research Council Formas (Grant No. 942‐2015‐388) is gratefully acknowledged for the financial support.

Available from: 2019-08-30 Created: 2019-08-30 Last updated: 2019-08-30Bibliographically approved
Idström, A., Gentile, L., Gubitosi, M., Olsson, C., Stenqvist, B., Lund, M., . . . Bialik, E. (2017). On the dissolution of cellulose in tetrabutylammonium acetate/dimethyl sulfoxide: a frustrated solvent. Cellulose (London), 24(9), 3645-3657
Open this publication in new window or tab >>On the dissolution of cellulose in tetrabutylammonium acetate/dimethyl sulfoxide: a frustrated solvent
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2017 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, no 9, p. 3645-3657Article in journal (Refereed) Published
Abstract [en]

We have found that the dissolution of cellulose in the binary mixed solvent tetrabutylammonium acetate/dimethyl sulfoxide follows a previously overlooked near-stoichiometric relationship such that one dissolved acetate ion is able to dissolve an amount of cellulose corresponding to about one glucose residue. The structure and dynamics of the resulting cellulose solutions were investigated using small-angle X-ray scattering (SAXS) and nuclear magnetic resonance techniques as well as molecular dynamics simulation. This yielded a detailed picture of the dissolution mechanism in which acetate ions form hydrogen bonds to cellulose and causes a diffuse solvation sheath of bulky tetrabutylammonium counterions to form. In turn, this leads to a steric repulsion that helps to keep the cellulose chains apart. Structural similarities to previously investigated cellulose solutions in aqueous tetrabutylammonium hydroxide were revealed by SAXS measurement. To what extent this corresponds to similarities in dissolution mechanism is discussed.

Keywords
Cellulose dissolution, Ionic liquids, Nuclear magnetic resonance, Small angle X-ray scattering, Molecular dynamics simulations
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30144 (URN)10.1007/s10570-017-1370-2 (DOI)2-s2.0-85021162537 (Scopus ID)
Available from: 2017-07-31 Created: 2017-07-31 Last updated: 2019-06-28Bibliographically approved
Idström, A., Gentile, L., Gubitosi, M., Olsson, C., Stenqvist, B., Lund, M., . . . Wernersson, E. (2017). Tetrabutylammonium acetate as a solvent for cellulose. In: : . Paper presented at COST Action FP1205, Borås, April 13-14..
Open this publication in new window or tab >>Tetrabutylammonium acetate as a solvent for cellulose
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2017 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30210 (URN)
Conference
COST Action FP1205, Borås, April 13-14.
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2019-06-28Bibliographically approved
Idström, A., Gentile, L., Gubitosi, M., Olsson, C., Stenqvist, B., Lund, M., . . . Wernersson, E. (2017). Tetrabutylammonium acetate/dimethyl sulfoxide  as a solvent for cellulose. In: : . Paper presented at Proceedings of the 14th European workshop on lignocellulosics and pulp, Autrans, France, June 28-30..
Open this publication in new window or tab >>Tetrabutylammonium acetate/dimethyl sulfoxide  as a solvent for cellulose
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2017 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30214 (URN)
Conference
Proceedings of the 14th European workshop on lignocellulosics and pulp, Autrans, France, June 28-30.
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2019-06-28Bibliographically approved
Idström, A., Gentile, L., Gubitosi, M., Olsson, C., Stenqvist, B., Lund, M., . . . Wernersson, E. (2016). Dissolution of cellulose in tetrabutylammonium acetate/dimethyl sulfoxide. In: The 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives: . Paper presented at 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, November 15-16, 2016, Örnsköldsvik, Sweden (pp. 15-18). , Article ID 1.
Open this publication in new window or tab >>Dissolution of cellulose in tetrabutylammonium acetate/dimethyl sulfoxide
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2016 (English)In: The 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, 2016, p. 15-18, article id 1Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

The dissolution of cellulose in tetrabutylammonium acetate (TBAAc)/dimethyl sulfoxide (DMSO) was studied combining experimental and simulation techniques. It was found that the dissolution limit at 40 °C corresponded to a molar ratio close to one acetate per cellulose anhydroglucose units. MD simulations suggested that the acetate ions bind to cellulose by dual hydrogen bonds. This effectively turns cellulose into a polyelectrolyte, attracting the bulky tetrabutylammonium (TBA+ ) counter ions, which prevent close contact between chains in the dissolved state. This hypothesis was tested by 1 Hand 13C-NMR spectroscopy, which confirmed that acetate forms hydrogen bonds to cellulose, and by diffusion NMR spectroscopy, which demonstrated a strong dynamic correlation between bound acetate and tetrabutylammonium in near-quantitative agreement with simulation. The present results suggest that offering hydrogen bonding to the acetate ions is the main driving force for dissolving cellulose and that the TBA+ counter ions form a diffuse layer around the acetate-decorated cellulose chains.

National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30217 (URN)
Conference
7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, November 15-16, 2016, Örnsköldsvik, Sweden
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2019-06-28Bibliographically approved
Bengtsson, J., Olsson, C., Idström, A. & Köhnke, T. (2016). Impact of non-solvents in the tetrabutylammonium acetate: dimethyl sulfoxide-cellulose system. In: The 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives: . Paper presented at 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, November 15-16, 2016, Örnsköldsvik, Sweden (pp. 19-22).
Open this publication in new window or tab >>Impact of non-solvents in the tetrabutylammonium acetate: dimethyl sulfoxide-cellulose system
2016 (English)In: The 7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, 2016, p. 19-22Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

This work examines the potential of tetrabutylammonium acetate: dimethyl sulfoxide (TBAAc:DMSO) as a solvent used in a process for producing man-made cellulose fibers. The tolerance towards nonsolvents is an important step to evaluate the recyclability of the solvent. TBAAc:DMSO was in this work further confirmed to be an efficient solvent for cellulose. Non-solvent tolerance depended on cellulose concentration, TBAAc:DMSO ratio and type of non-solvent. There was no significant change in mechanical properties for filaments regenerated from solutions containing 2 wt% non-solvent compared to those spun from virgin solvent. With 4 wt% ethanol present in solution very brittle filaments were produced, not suitable for use as textile fibers.

National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30205 (URN)
Conference
7th Workshop on cellulose, regenerated cellulose and cellulose derivatives, November 15-16, 2016, Örnsköldsvik, Sweden
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2019-06-24Bibliographically approved
Olsson, C., Köhnke, T., Idström, A., Gentile, L., Gubitosi, M., Stenqvist, B., . . . Wernersson, E. (2016). Tetrabutylammonium acetate as a solvent for cellulose. In: : . Paper presented at COST Action FP1205, April 13-14, 2016, Borås, Sweden.
Open this publication in new window or tab >>Tetrabutylammonium acetate as a solvent for cellulose
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2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-30327 (URN)
Conference
COST Action FP1205, April 13-14, 2016, Borås, Sweden
Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2019-06-28Bibliographically approved
Idström, A., Gentile, L., Gubitosi, M., Olsson, C., Stenqvist, B., Lund, M., . . . Wernersson, E. (2016). Tetrabutylammonium acetate/dimethyl sulfoxide  as a solvent for cellulose. In: : . Paper presented at 6th Avancell Conference, October 18-19, 2016, Gothenburg, Sweden.
Open this publication in new window or tab >>Tetrabutylammonium acetate/dimethyl sulfoxide  as a solvent for cellulose
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2016 (English)Conference paper, Oral presentation with published abstract (Other academic)
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30215 (URN)
Conference
6th Avancell Conference, October 18-19, 2016, Gothenburg, Sweden
Available from: 2017-08-04 Created: 2017-08-04 Last updated: 2019-06-28Bibliographically approved
Olsson, C., Hedlund, A., Idström, A. & Westman, G. (2014). Effect of methylimidazole on cellulose/ionic liquid solutions and regenerated material therefrom (ed.). Journal of Materials Science, 49(9), 3423-3433
Open this publication in new window or tab >>Effect of methylimidazole on cellulose/ionic liquid solutions and regenerated material therefrom
2014 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 49, no 9, p. 3423-3433Article in journal (Refereed) Published
Abstract [en]

Cellulose, especially wood-based cellulose, is increasingly important for making everyday materials such as man-made-regenerated textile fibers, produced via dissolution and subsequent precipitation. In this paper, the effect of cosolvents in ionic liquid-facilitated cellulose dissolution is discussed. Both microcrystalline cellulose and dissolving grade hardwood pulp were studied. Three different cosolvents in combination with ionic liquid were evaluated using turbidity measurements and viscosity. The ionic liquid precursor N-methylimidazole proved to be a promising cosolvent candidate and was thus selected for further studies together with the ionic liquid 1-ethyl-3- methylimidazolium acetate. Results show that dissolution rate can be increased by cosolvent addition, and the viscosity can be significantly reduced. The solutions were stable over time at room temperature and could be converted to regenerated textile fibers with good mechanical properties via airgap spinning and traditional wet spinning. Fibers spun from binary solvents exhibited significantly higher crystallinity than the fibers from neat ionic liquid. © 2014 The Author(s).

National Category
Materials Engineering
Identifiers
urn:nbn:se:ri:diva-13314 (URN)10.1007/s10853-014-8052-3 (DOI)2-s2.0-84894080394 (Scopus ID)
Available from: 2016-09-22 Created: 2016-09-22 Last updated: 2019-06-28Bibliographically approved
Östlund, A., Idström, A., Olsson, C., Larsson, P. & Nordstierna, L. (2013). Modification of crystallinity and pore size distribution in coagulated cellulose films (ed.). Cellulose (London) (4), 1657-1667
Open this publication in new window or tab >>Modification of crystallinity and pore size distribution in coagulated cellulose films
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2013 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, no 4, p. 1657-1667Article in journal (Refereed) Published
National Category
Paper, Pulp and Fiber Technology Other Materials Engineering
Identifiers
urn:nbn:se:ri:diva-9779 (URN)10.1007/s10570-013-9982-7 (DOI)2-s2.0-84881030017 (Scopus ID)
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2019-06-28Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4765-8224

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