Endre søk
Link to record
Permanent link

Direct link
BETA
Publikasjoner (10 av 64) Visa alla publikasjoner
Oliaei, E., Lindén, P., Wu, Q., Berthold, F., Berglund, L. & Lindström, T. (2020). Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp. Cellulose (London)
Åpne denne publikasjonen i ny fane eller vindu >>Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp
Vise andre…
2020 (engelsk)Inngår i: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882XArtikkel i tidsskrift (Fagfellevurdert) Epub ahead of print
Abstract [en]

Abstract: Microfibrillated cellulose (MFC) is an important industrial nanocellulose product and material component. New MFC grades can widen the materials property range and improve product tailoring. Microfibrillated lignocellulose (MFLC) is investigated, with the hypothesis that there is an optimum in lignin content of unbleached wood pulp fibre with respect to nanofibril yield. A series of kraft fibres with falling Kappa numbers (lower lignin content) was prepared. Fibres were beaten and fibrillated into MFLC by high-pressure microfluidization. Nano-sized fractions of fibrils were separated using centrifugation. Lignin content and carbohydrate analysis, total charge, FE-SEM, TEM microscopy and suspension rheology characterization were carried out. Fibres with Kappa number 65 (11% lignin) combined high lignin content with ease of fibrillation. This confirms an optimum in nanofibril yield as a function of lignin content, and mechanisms are discussed. MFLC from these fibres contained a 40–60 wt% fraction of nano-sized fibrils with widths in the range of 2.5–70 nm. Despite the large size distribution, data for modulus and tensile strength of MFLC films with 11% lignin were as high as 14 GPa and 240 MPa. MFLC films showed improved water contact angle of 84–88°, compared to neat MFC films (< 50°). All MFLC films showed substantial optical transmittance, and the fraction of haze scattering strongly correlated with defect content in the form of coarse fibrils. Graphic abstract: [Figure not available: see fulltext.] © 2019, The Author(s).

sted, utgiver, år, opplag, sider
Springer, 2020
Emneord
Fibrillation, Lignin, Lignin-containing cellulose nanofibril (LCNF), Mechanical properties, Nanocellulose, Cellulose, Contact angle, Fibers, Nanofibers, Pulp beating, Tensile strength, Unbleached pulp, Carbohydrate analysis, High pressure microfluidization, Material components, Microfibrillated cellulose (MFC), Nanofibril, Suspension rheology, Water contact angle, Wood
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-43372 (URN)10.1007/s10570-019-02934-8 (DOI)2-s2.0-85077400087 (Scopus ID)
Merknad

Funding details: Stiftelsen för Miljöstrategisk Forskning, MISTRA; Funding details: Kungliga Tekniska Högskolan, KTH; Funding details: Wallenberg Wood Science Center, WWSC; Funding details: Stiftelsen för Strategisk Forskning, SSF; Funding text 1: Funding was provided by Stiftelsen för Strategisk Forskning (Grant No. FID15-0115).; Funding text 2: We would like to kindly acknowledge Lars Norberg for helping with Sprout-Waldron refining, Hui Chen for the help with optical transmittance, and Dr Per A. Larsson and Dr Göksu Cinar Ciftci for help with the fractionation set-up. Ann-Marie Runebjörk and Åsa Engström are also acknowledged for their support in the nanocellulose lab at RISE. The funding support of this work by the Swedish Foundation for Strategic Research, STFI association of interested parties and Wallenberg Wood Science Center, and open access funding provided by Royal Institute of Technology are gratefully acknowledged. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Tilgjengelig fra: 2020-01-29 Laget: 2020-01-29 Sist oppdatert: 2020-01-29bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>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 (svensk)Rapport (Annet vitenskapelig)
sted, utgiver, år, opplag, sider
Stockholm: RISE, 2019. s. 30
Serie
RISE Rapport ; 2019:85
Serie
RISE Bioeconomy report ; 31
Emneord
construction, robots, digitizing, wood
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-39841 (URN)978-91-89049-15-4 (ISBN)
Prosjekter
BioInnovationIPOS - Innovationspotential svenskt trä
Tilgjengelig fra: 2019-08-27 Laget: 2019-08-27 Sist oppdatert: 2019-10-03
Oliaei, E., Linden, P., Wu, Q., Berthold, F., Berglund, L. & Lindström, T. (2019). Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp. Cellulose (London), 27, 2325-2341
Åpne denne publikasjonen i ny fane eller vindu >>Microfibrillated lignocellulose (MFLC) and nanopaper films from unbleached kraft softwood pulp
Vise andre…
2019 (engelsk)Inngår i: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 27, s. 2325-2341Artikkel i tidsskrift (Fagfellevurdert) Epub ahead of print
Abstract [en]

Microfibrillated cellulose (MFC) is an important industrial nanocellulose product and material component. New MFC grades can widen the materials property range and improve product tailoring. Microfibrillated lignocellulose (MFLC) is investigated, with the hypothesis that there is an optimum in lignin content of unbleached wood pulp fibre with respect to nanofibril yield. A series of kraft fibres with falling Kappa numbers (lower lignin content) was prepared. Fibres were beaten and fibrillated into MFLC by high-pressure microfluidization. Nano-sized fractions of fibrils were separated using centrifugation. Lignin content and carbohydrate analysis, total charge, FE-SEM, TEM microscopy and suspension rheology characterization were carried out. Fibres with Kappa number 65 (11% lignin) combined high lignin content with ease of fibrillation. This confirms an optimum in nanofibril yield as a function of lignin content, and mechanisms are discussed. MFLC from these fibres contained a 40-60 wt% fraction of nano-sized fibrils with widths in the range of 2.5-70 nm. Despite the large size distribution, data for modulus and tensile strength of MFLC films with 11% lignin were as high as 14 GPa and 240 MPa. MFLC films showed improved water contact angle of 84-88 degrees, compared to neat MFC films (< 50 degrees). All MFLC films showed substantial optical transmittance, and the fraction of haze scattering strongly correlated with defect content in the form of coarse fibrils. [GRAPHICS] .

sted, utgiver, år, opplag, sider
SPRINGER, 2019
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-43307 (URN)10.1007/s10570-019-02934-8 (DOI)
Tilgjengelig fra: 2020-01-23 Laget: 2020-01-23 Sist oppdatert: 2020-03-30bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Fiber length and bonding effects on tensile strength and toughness of kraft paper
2018 (engelsk)Inngår i: Journal of Materials Science, ISSN 0022-2461, E-ISSN 1573-4803, Vol. 53, nr 4, s. 3006-3015Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
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
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-33242 (URN)10.1007/s10853-017-1683-4 (DOI)2-s2.0-85031901532 (Scopus ID)
Merknad

Funding details: KTH, Kungliga Tekniska Högskolan; 

Tilgjengelig fra: 2018-02-27 Laget: 2018-02-27 Sist oppdatert: 2018-08-22bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Nanocellulose as a natural source for groundbreaking applications in materials science: Today's state
Vise andre…
2018 (engelsk)Inngår i: Materials Today, ISSN 1369-7021, E-ISSN 1873-4103, Vol. 21, nr 7, s. 720-748Artikkel i tidsskrift (Fagfellevurdert) 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.

HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-34489 (URN)10.1016/j.mattod.2018.02.001 (DOI)2-s2.0-85046132998 (Scopus ID)
Merknad

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 )

Tilgjengelig fra: 2018-08-09 Laget: 2018-08-09 Sist oppdatert: 2018-12-20bibliografisk kontrollert
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.
Åpne denne publikasjonen i ny fane eller vindu >>Nanofibrillated Cellulose-Based Electrolyte and Electrode for Paper-Based Supercapacitors
Vise andre…
2018 (engelsk)Inngår i: ADVANCED SUSTAINABLE SYSTEMS, ISSN 2366-7486, Vol. 2, nr 1, artikkel-id 1700121Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
composites, energy density, nanofibrillated cellulose (NFC), power density, supercapacitors
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-33702 (URN)10.1002/adsu.201700121 (DOI)
Tilgjengelig fra: 2018-05-07 Laget: 2018-05-07 Sist oppdatert: 2018-08-22bibliografisk kontrollert
Lindström, T. (2017). Aspects on nanofibrillated cellulose (NFC) processing, rheology and NFC-film properties. Current Opinion in Colloid & Interface Science, 29, 68-75
Åpne denne publikasjonen i ny fane eller vindu >>Aspects on nanofibrillated cellulose (NFC) processing, rheology and NFC-film properties
2017 (engelsk)Inngår i: Current Opinion in Colloid & Interface Science, ISSN 1359-0294, E-ISSN 1879-0399, Vol. 29, s. 68-75Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
Nanofibrillated cellulose (NFC); Nanocellulose; Microfibrillated cellulose; Homogenization;Film strength;Rheology;Characterization;Gas barrier;Oxygen permeability
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-29293 (URN)10.1016/j.cocis.2017.02.005 (DOI)2-s2.0-85015363820 (Scopus ID)
Tilgjengelig fra: 2017-04-18 Laget: 2017-04-18 Sist oppdatert: 2018-08-22bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Effect of the size of the charged group on the properties of alkoxylated NFCs
Vise andre…
2017 (engelsk)Inngår i: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, nr 3, s. 1307-1317Artikkel i tidsskrift (Fagfellevurdert) 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. 

Emneord
Nanofibrillated cellulose, NFC, Alkoxylation, Redispersion, Degree of fibrillation, Barrier properties, NMR
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-28193 (URN)10.1007/s10570-017-1190-4 (DOI)2-s2.0-85008622734 (Scopus ID)
Tilgjengelig fra: 2017-03-15 Laget: 2017-03-15 Sist oppdatert: 2018-08-22bibliografisk kontrollert
Naderi, A. & Lindström, T. (2017). Erratum to: Nanofibrillated cellulose: properties reinvestigated. Cellulose (London), 24(12), 5713-5713
Åpne denne publikasjonen i ny fane eller vindu >>Erratum to: Nanofibrillated cellulose: properties reinvestigated
2017 (engelsk)Inngår i: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 24, nr 12, s. 5713-5713Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
Springer Netherlands, 2017
Emneord
Nanofibrillated cellulose, Cellulose
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-32447 (URN)10.1007/s10570-017-1516-2 (DOI)2-s2.0-85031425460 (Scopus ID)
Merknad

cited By 0; Article in Press

Tilgjengelig fra: 2017-12-01 Laget: 2017-12-01 Sist oppdatert: 2018-08-22bibliografisk kontrollert
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
Åpne denne publikasjonen i ny fane eller vindu >>Generating in-Plane Orientational Order in Multilayer Films Prepared by Spray-Assisted Layer-by-Layer Assembly
Vise andre…
2017 (engelsk)Inngår i: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 11, nr 1, s. 84-94Artikkel i tidsskrift (Fagfellevurdert) 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.

Emneord
anisotropic materials, cellulose nanofibrils, in-plane orientation, layer-by-layer assembly, polyelectrolyte multilayers, spray-assisted alignment
HSV kategori
Identifikatorer
urn:nbn:se:ri:diva-29744 (URN)10.1021/acsnano.6b04191 (DOI)2-s2.0-85018474813 (Scopus ID)
Tilgjengelig fra: 2017-05-30 Laget: 2017-05-30 Sist oppdatert: 2019-01-03bibliografisk kontrollert
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-7979-9158
v. 2.35.10