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Jarnerö, K. & Johansson, M. (2019). Digitalisering/robotisering–utvecklingsfronten för trä-/hybridmaterial i byggande: 4 besöksrapporter från studieresa till Schweiz 13-15/3 2019 med besök påuniversitet, högskolor, forskningsinstitut samt företag. Stockholm: RISE
Open this publication in new window or tab >>Digitalisering/robotisering–utvecklingsfronten för trä-/hybridmaterial i byggande: 4 besöksrapporter från studieresa till Schweiz 13-15/3 2019 med besök påuniversitet, högskolor, forskningsinstitut samt företag
2019 (Swedish)Report (Other academic)
Place, publisher, year, edition, pages
Stockholm: RISE, 2019. p. 30
Series
RISE Rapport ; 2019:85
Series
RISE Bioeconomy report ; 31
Keywords
construction, robots, digitizing, wood
National Category
Construction Management
Identifiers
urn:nbn:se:ri:diva-39841 (URN)978-91-89049-15-4 (ISBN)
Projects
BioInnovationIPOS - Innovationspotential svenskt trä
Available from: 2019-08-27 Created: 2019-08-27 Last updated: 2019-08-28
Larsson, P. T., Lindström, T., Carlsson, L. A. & Fellers, C. (2018). Fiber length and bonding effects on tensile strength and toughness of kraft paper. Journal of Materials Science, 53(4), 3006-3015
Open this publication in new window or tab >>Fiber length and bonding effects on tensile strength and toughness of kraft paper
2018 (English)In: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 53, no 4, p. 3006-3015Article in journal (Refereed) Published
Abstract [en]

Fiber length and fiber-to-fiber bonding effects on tensile strength and fracture toughness of kraft paper have experimentally been investigated. Laboratory sheets were made from kraft pulp, each with a distinct set of fiber lengths. Additionally, the fiber–fiber bond strength was improved by carboxymethyl (CMC) grafting. The tensile strength and work of fracture toughness results were compared to predictions from a shear-lag model which considers the fiber–fiber bond shear strength, the fiber tensile strength and fiber pull-out work. The tensile strength and fracture work for papers with weak fiber–fiber bonds increased with fiber length consistent with the shear-lag model. CMC-treated fibers provided strong fiber–fiber bonds. Papers made from such fibers displayed high strength and work of fracture independent of fiber length which indicates that the failure process is governed by fiber failures rather than bond failures. The fracture toughness, expressed as the critical value of the J-integral, increased strongly with fiber length for both untreated and CMC-treated papers. The results show that long fibers and CMC addition are extremely beneficial for improving the fracture toughness. © 2017, Springer Science+Business Media, LLC.

Keywords
Fiber optic sensors, Fibers, Fracture, Fracture toughness, Kraft paper, Kraft pulp, Paper, Tensile strength, Critical value, Failure process, Fiber failures, Fiber tensile strengths, Laboratory sheet, Shear-lag model, Strength and toughness, Work of fracture, Fiber bonding, Bonding, Fiber Length, Kraft Papers
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33242 (URN)10.1007/s10853-017-1683-4 (DOI)2-s2.0-85031901532 (Scopus ID)
Note

Funding details: KTH, Kungliga Tekniska Högskolan; 

Available from: 2018-02-27 Created: 2018-02-27 Last updated: 2018-08-22Bibliographically approved
Klemm, D., Cranston, E. D., Fischer, D., Gama, M., Kedzior, S. A., Kralisch, D., . . . Rauchfuß, F. (2018). Nanocellulose as a natural source for groundbreaking applications in materials science: Today's state. Materials Today, 21(7), 720-748
Open this publication in new window or tab >>Nanocellulose as a natural source for groundbreaking applications in materials science: Today's state
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2018 (English)In: Materials Today, ISSN 1369-7021, E-ISSN 1873-4103, Vol. 21, no 7, p. 720-748Article in journal (Refereed) Published
Abstract [en]

Nanocelluloses are natural materials with at least one dimension in the nano-scale. They combine important cellulose properties with the features of nanomaterials and open new horizons for materials science and its applications. The field of nanocellulose materials is subdivided into three domains: biotechnologically produced bacterial nanocellulose hydrogels, mechanically delaminated cellulose nanofibers, and hydrolytically extracted cellulose nanocrystals. This review article describes today's state regarding the production, structural details, physicochemical properties, and innovative applications of these nanocelluloses. Promising technical applications including gels/foams, thickeners/stabilizers as well as reinforcing agents have been proposed and research from last five years indicates new potential for groundbreaking innovations in the areas of cosmetic products, wound dressings, drug carriers, medical implants, tissue engineering, food and composites. The current state of worldwide commercialization and the challenge of reducing nanocellulose production costs are also discussed.

National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-34489 (URN)10.1016/j.mattod.2018.02.001 (DOI)2-s2.0-85046132998 (Scopus ID)
Note

Free State of Thuringia and the European Social Fund ( 2016 FGR 0045 ).  Federal Ministry of Economic Affairs and Energy , ZIM ( KF2748903MF4 and KF2386003MF3 ). QREN (“Quadro de Referência Estratégica Nacional”) through the BioTecNorte operation ( NORTE-01-0145-FEDER-000004 ) funded by the European Regional Development Fund under the scope of Norte2020-Programa Operacional Regional do Norte.Natural Sciences and Engineering Research Council of Canada ( NSERC ) in the form of a Discovery Grant ( RGPIN 402329 )

Available from: 2018-08-09 Created: 2018-08-09 Last updated: 2018-12-20Bibliographically approved
Jiao, F., Edberg, J., Zhao, D., Puzinas, S., Khan, Z. U., Makie, P., . . . Crispin, X. (2018). Nanofibrillated Cellulose-Based Electrolyte and Electrode for Paper-Based Supercapacitors. ADVANCED SUSTAINABLE SYSTEMS, 2(1), Article ID 1700121.
Open this publication in new window or tab >>Nanofibrillated Cellulose-Based Electrolyte and Electrode for Paper-Based Supercapacitors
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2018 (English)In: ADVANCED SUSTAINABLE SYSTEMS, ISSN 2366-7486, Vol. 2, no 1, article id 1700121Article in journal (Refereed) Published
Abstract [en]

Solar photovoltaic technologies could fully deploy and impact the energy conversion systems in our society if mass-produced energy-storage solutions exist. A supercapacitor can regulate the fluctuations on the electrical grid on short time scales. Their mass-implementation requires the use of abundant materials, biological and organic synthetic materials are attractive because of atomic element abundancy and low-temperature synthetic processes. Nanofibrillated cellulose (NFC) coming from the forest industry is exploited as a three-dimensional template to control the transport of ions in an electrolyte-separator, with nanochannels filled of aqueous electrolyte. The nanochannels are defined by voids in the nanocomposite made of NFC and the proton transporting polymer polystyrene sulfonic acid PSSH. The ionic conductivity of NFC-PSSH composites (0.2 S cm(-1) at 100% relative humidity) exceeds sea water in a material that is solid, feel dry to the finger, but filled of nanodomains of water. A paper-based supercapacitor made of NFC-PSSH electrolyte-separator sandwiched between two paper-based electrodes is demonstrated. Although modest specific capacitance (81.3 F g(-1)), power density (2040 W kg(-1)) and energy density (1016 Wh kg(-1)), this is the first conceptual demonstration of a supercapacitor based on cellulose in each part of the device; which motivates the search for using paper manufacturing as mass-production of energy-storage devices.

Keywords
composites, energy density, nanofibrillated cellulose (NFC), power density, supercapacitors
National Category
Natural Sciences
Identifiers
urn:nbn:se:ri:diva-33702 (URN)10.1002/adsu.201700121 (DOI)
Available from: 2018-05-07 Created: 2018-05-07 Last updated: 2018-08-22Bibliographically approved
Lindström, T. (2017). Aspects on nanofibrillated cellulose (NFC) processing, rheology and NFC-film properties. Current Opinion in Colloid & Interface Science, 29, 68-75
Open this publication in new window or tab >>Aspects on nanofibrillated cellulose (NFC) processing, rheology and NFC-film properties
2017 (English)In: Current Opinion in Colloid & Interface Science, ISSN 1359-0294, E-ISSN 1879-0399, Vol. 29, p. 68-75Article in journal (Refereed) Published
Abstract [en]

This communication summarizes the salient features and mechanisms in high-pressure homogenization of wood fibres in order to make nanofibrillar cellulose (NFC). The energy-efficiency of delamination of fibres and the clogging tendency of fibres in high-pressure homogenizers/microfluidizers during delamination are critical and ways to alleviate these problems are reviewed. It is shown that the mechanical properties of NFC-films can be estimated from the Page equation. Usually, the evolution of the tensile strength properties of NFC-films increases with the extent of film delamination to reach a saturation value, which can be deduced from first principles using the Page equation. Finally, the evolution of the rheological features of NFC-gels and the barrier properties are reviewed and the estimation the nanofraction content in NFC-gels is being discussed.

Keywords
Nanofibrillated cellulose (NFC); Nanocellulose; Microfibrillated cellulose; Homogenization;Film strength;Rheology;Characterization;Gas barrier;Oxygen permeability
National Category
Paper, Pulp and Fiber Technology Nano Technology
Identifiers
urn:nbn:se:ri:diva-29293 (URN)10.1016/j.cocis.2017.02.005 (DOI)2-s2.0-85015363820 (Scopus ID)
Available from: 2017-04-18 Created: 2017-04-18 Last updated: 2018-08-22Bibliographically approved
Naderi, A., Larsson, P. T., Stevanic Srndovic, J., Lindström, T. & Erlandsson, J. (2017). Effect of the size of the charged group on the properties of alkoxylated NFCs. Cellulose (London), 24(3), 1307-1317
Open this publication in new window or tab >>Effect of the size of the charged group on the properties of alkoxylated NFCs
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2017 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, no 3, p. 1307-1317Article in journal (Refereed) Published
Abstract [en]

The impact of the size of the charged group on the properties of alkoxylated NFC was studied by two chloroalkyl acid reagents. It was found that the employment of the larger 2-chloropropionic acid reagent leads to improved properties, e.g. higher fraction of nano-sized materials, and significantly better redispersion as compared to when the smaller monochloroacetic acid was employed. The differences in the impacts of the different reagents were hypothesized to be due to a more efficient disruption of the cohesion between the nanofibrils when a larger charged group was employed. 

Keywords
Nanofibrillated cellulose, NFC, Alkoxylation, Redispersion, Degree of fibrillation, Barrier properties, NMR
National Category
Paper, Pulp and Fiber Technology Nano Technology
Identifiers
urn:nbn:se:ri:diva-28193 (URN)10.1007/s10570-017-1190-4 (DOI)2-s2.0-85008622734 (Scopus ID)
Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2018-08-22Bibliographically approved
Naderi, A. & Lindström, T. (2017). Erratum to: Nanofibrillated cellulose: properties reinvestigated. Cellulose (London), 24(12), 5713-5713
Open this publication in new window or tab >>Erratum to: Nanofibrillated cellulose: properties reinvestigated
2017 (English)In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, no 12, p. 5713-5713Article in journal (Refereed) Published
Abstract [en]

In the original publication of the article, the co-author name Tom Lindströ¶m was mistakenly missed out. Also the affiliation of the corresponding author was provided incorrectly. It has been updated in this erratum.

Place, publisher, year, edition, pages
Springer Netherlands, 2017
Keywords
Nanofibrillated cellulose, Cellulose
National Category
Paper, Pulp and Fiber Technology Nano Technology
Identifiers
urn:nbn:se:ri:diva-32447 (URN)10.1007/s10570-017-1516-2 (DOI)2-s2.0-85031425460 (Scopus ID)
Note

cited By 0; Article in Press

Available from: 2017-12-01 Created: 2017-12-01 Last updated: 2018-08-22Bibliographically approved
Blell, R., Lin, X., Lindström, T., Ankerfors, M., Pauly, M., Felix, O. & Decher, G. (2017). Generating in-Plane Orientational Order in Multilayer Films Prepared by Spray-Assisted Layer-by-Layer Assembly. ACS Nano, 11(1), 84-94
Open this publication in new window or tab >>Generating in-Plane Orientational Order in Multilayer Films Prepared by Spray-Assisted Layer-by-Layer Assembly
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2017 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 11, no 1, p. 84-94Article in journal (Refereed) Published
Abstract [en]

We present a simple yet efficient method for orienting cellulose nanofibrils in layer-by-layer assembled films through spray-assisted alignment. While spraying at 90° against a receiving surface produces films with homogeneous in-plane orientation, spraying at smaller angles causes a macroscopic directional surface flow of liquid on the receiving surface and leads to films with substantial in-plane anisotropy when nanoscale objects with anisotropic shapes are used as components. First results with cellulose nanofibrils demonstrate that such fibrils are easily aligned by grazing incidence spraying to yield optically birefringent films over large surface areas. We show that the cellulosic nanofibrils are oriented parallel to the spraying direction and that the orientational order depends for example on the distance of the receiving surface from the spray nozzle. The alignment of the nanofibrils and the in-plane anisotropy of the films were independently confirmed by atomic force microscopy, optical microscopy between crossed polarizers, and the ellipsometric determination of the apparent refractive index of the film as a function of the in-plane rotation of the sample with respect to the plane of incidence of the ellipsometer.

Keywords
anisotropic materials, cellulose nanofibrils, in-plane orientation, layer-by-layer assembly, polyelectrolyte multilayers, spray-assisted alignment
National Category
Nano Technology Materials Engineering
Identifiers
urn:nbn:se:ri:diva-29744 (URN)10.1021/acsnano.6b04191 (DOI)2-s2.0-85018474813 (Scopus ID)
Available from: 2017-05-30 Created: 2017-05-30 Last updated: 2019-01-03Bibliographically approved
Jiao, F., Naderi, A., Zhao, D., Schlueter, J., Shahi, M., Sundström, J., . . . Crispin, X. (2017). Ionic thermoelectric paper. Journal of Materials Chemistry A, 5, 16883-16888
Open this publication in new window or tab >>Ionic thermoelectric paper
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2017 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 5, p. 16883-16888Article in journal (Refereed) Published
Abstract [en]

Ionic thermoelectric materials, for example, polyelectrolytes such as polystyrene sulfonate sodium (PSSNa),constitute a new class of materials which are attracting interest because of their large Seebeck coefficientand the possibility that they could be used in ionic thermoelectric SCs (ITESCs) and field effect transistors.However, pure polyelectrolyte membranes are not robust or flexible. In this paper, the preparation of ionicthermoelectric paper using a simple, scalable and cost-effective method is described. After a compositewas fabricated with nanofibrillated cellulose (NFC), the resulting NFC–PSSNa paper is flexible andmechanically robust, which is desirable if it is to be used in roll-to-roll processes. The robust NFC–PSSNa thermoelectric paper combines high ionic conductivity (9 mS cm1), high ionic Seebeckcoefficient (8.4 mV K1) and low thermal conductivity (0.75 W m1 K1) at 100% relative humidity,resulting in overall figure-of-merit of 0.025 at room temperature which is slightly better than that for thePSSNa alone. Fabricating a composite with cellulose enables flexibility and robustness and this is anadvance which will enable future scaling up the manufacturing of ITESCs, but also enables its use fornew applications for conformable thermoelectric devices and flexible electronics.

Keywords
thermoelectricity, polyelectrolyte, paper, new material, nanofibrillated cellulose, NFC, flexible electronics
National Category
Paper, Pulp and Fiber Technology
Identifiers
urn:nbn:se:ri:diva-30366 (URN)10.1039/c7ta03196c (DOI)2-s2.0-85027447013 (Scopus ID)
Available from: 2017-08-22 Created: 2017-08-22 Last updated: 2019-01-09Bibliographically approved
Lie, E., Ålander, E. & Lindström, T. (2017). Possible toxicological effects of nanocellulose: an updated literature study, No. 2. Stockholm: Innventia
Open this publication in new window or tab >>Possible toxicological effects of nanocellulose: an updated literature study, No. 2
2017 (English)Report (Other academic)
Abstract [en]

This literature review covers open publications and reports on the subject of nanocellulose and its possible toxicological effects. There is currently a rather low number of peer reviewed articles on the subject. However, from the articles reviewed, caution of inhalation of nanocellulose would be recommended since in vivo tests have shown immunotoxicity effect on lungs even though residues of other production chemicals, biocides and endotoxins from bacterial contamination might affect the results.

Place, publisher, year, edition, pages
Stockholm: Innventia, 2017. p. 22
Series
Innventia report ; 916
Keywords
toxicity, nanocellulose, literature survey
National Category
Nano Technology Medical and Health Sciences
Identifiers
urn:nbn:se:ri:diva-36539 (URN)
Available from: 2018-11-27 Created: 2018-11-27 Last updated: 2018-11-27Bibliographically approved
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0001-7979-9158

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