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  • 451.
    Soderberg, D.
    et al.
    RISE, Innventia.
    Lucisano, M.
    RISE, Innventia.
    Drotz, M.
    RISE, Innventia.
    Rosen, F.
    Comparison between forming strategies regarding their effect on paper properties2013Conference paper (Refereed)
  • 452.
    Srinivasa, Prashanth
    et al.
    KTH Royal Institute of Technology, Sweden.
    Kulachenko, Artem
    KTH Royal Institute of Technology, Sweden.
    Aulin, Christian
    RISE, Innventia.
    Experimental characterisation of nanofibrillated cellulose foams2015In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 22, no 6, p. 3739-3753Article in journal (Refereed)
    Abstract [en]

    There is a growing interest in applications for nanofibrillated cellulose based materials owing to their exceptional mechanical properties. Nanofibrillated cellulose (NFC) foam is one such derivative which has potential applications in a wide array of fields. Here, we characterise the mechanical properties of two particular high porosity NFC foams (98.13 and 98.96 %) prepared by a freeze drying process. We evaluate their behaviour in uni-axial and bi-axial compression with cyclic loading. The secondary loading cycles reveal complete irreversible damage of the microstructure, with the secondary loading path being characterised by near zero plateau stress. In force controlled tests, negligible hysteresis corroborates the idea that there is no energy dissipation owing to near complete microstructural damage. Furthermore, we observe no indications of preferential orientation of the microstructure in these tests. The stress responses in mutually perpendicular directions are seen to be identical, within statistical considerations. We then utilise the “pseudo-elastic” model developed and adopt it to the case of highly compressible Ogden strain energy formulation with a modified neo-Hookean for the unloading, with a view of fitting a continuum hyperelastic model to the experimental data. The material parameters obtained from uni-axial data are seen to be insufficient to describe the more general bi-axial deformation. The parameters obtained from the bi-axial test describe uni-axial deformation up to stretches of ~0.5 but overestimate the stress levels beyond that point.

  • 453.
    Stepien, M.
    et al.
    Åbo Akademi University, Finland.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Saarinen, J. J.
    Åbo Akademi University, Finland.
    Teisala, H.
    Tampere University of Technology, Finland.
    Tuominen, Mikko
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor, Material och ytteknik.
    Haapanen, J.
    Tampere University of Technology, Finland.
    Kuusipalo, J.
    Tampere University of Technology, Finland.
    Mäkelä, J. M.
    Tampere University of Technology, Finland.
    Toivakka, M.
    Åbo Akademi University, Finland.
    Abrasion and compression resistance of liquid-flame-spray-deposited functional nanoparticle coatings on paper2014In: 13th TAPPI Advanced Coating Fundamentals Symposium 2014, TAPPI Press, 2014, p. 68-82Conference paper (Refereed)
    Abstract [en]

    • Liquid flame spray technology enables low-cost, large-scale nanoparticle deposition in roll-to-roll processes for controlling wettability and creating functional surfaces • SiO2 nanocoating has higher abrasion resistance than TiO2 coating, possibly due to better interparticle sintering • Wettability properties of the LFS nanoparticle coated paperboard are partially maintained after abrasion with a paper surface or compression through calendering • The changes in wettability are due to smoothening of the nanoparticle surface Changes in wettability properties during transport and in converting operations can be expected to be small • Challenges: - Nanoparticle release to air and safety aspects are unknown and difficult to quantify • Potential applications: - Printability control - Improved barrier and heat-sealing properties for extrusion coated board - Adhesion promotion in converting - Liquid absorption control in papermaking and converting operations - Functional surfaces, e.g., self-cleaning surfaces - Printed electronics applications - Microfluidics.

  • 454.
    Stepien, M.
    et al.
    Åbo Akademi University, Finland.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Saarinen, J.J
    Åbo Akademi University, Finland.
    Teisala, H.
    Tampere University of Technology, Finland.
    Tuominen, M.
    RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Kemi Material och Ytor.
    Haapanen, J.
    Tampere University of Technology, Finland.
    Kuusipalo, J.
    Tampere University of Technology, Finland.
    Abrasion and Compression Resistance of Liquid-Flame-Spray-Deposited Functional Nanoparticle Coatings on Paper2014Conference paper (Refereed)
    Abstract [en]

    Functional paper surfaces with adjustable wettability can be fabricated by deposition of nanoparticles in a roll-to-roll liquid flame spray (LFS) process. The TiO2 nanoparticle coating creates a superhydrophobic surface with water CAs exceeding 160°, whereas SiO2 nanoparticle coating creates highly hydrophilic surfaces with water CAs as low as 21°. The superhydrophobicity or hydrophilicity is a result of the combined effect of surface structure and surface chemistry of the nanoparticles. Furthermore, the wettability of the TiO2-nanoparticle coated paper can controlled photocatalytically and adjusted with UV-treatment to any water contact angle between 10° to 160°. In the current work, the abrasion and compression resistance of LFS nanoparticle coated paper was investigated with rotary abrasion testing and calendering. Changes in sample properties were analysed with contact angle measurements, atomic force microscopy and high resolution field-emission scanning electron microscopy (FESEM).

  • 455. Stepien, M.
    et al.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Saarinen, J.J.
    Teisalo, H.
    Tuominen, M.
    Wear resistance of nanoparticle coatings on paperboard2013In: Wear, ISSN 0043-1648, E-ISSN 1873-2577, Vol. 307Article in journal (Refereed)
  • 456.
    Sterner, Marion
    et al.
    Gruppo X di X Gruppo, Italy.
    Magnusson, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy.
    Innovative paper-technology for novel longitudinally corrugated layers2017In: Paper Conference and Trade Show: Renew, Rethink, Redefine the Future, PaperCon 2017, TAPPI Press, 2017, Vol. 2, p. 912-916Conference paper (Other academic)
    Abstract [en]

    A novel longitudinally corrugated paper-layer in continuous production has been generated out of an innovative technology for imparting customized stretch to fibrous webs. Traditional corrugated board consists in a transversally corrugated layer (fluting) which is glued to at least one second layer (liner) for holding the corrugations in place. The novel longitudinally corrugated layer is produced as a stable wave structure without the need of gluing on a second sheet. For additional stiffness in MD and in CD in a final panel, said layer can be combined to any traditionally produced corrugated material. The technology on which this novel longitudinally corrugated paper-layer is based, can also impart separately both CD and MD stretch to paper for the generation of 3D-deformed patterns in order to e.g. stiffen the corrugated board with appropriate structures, or to create layers with 3D-impressions for communication or aesthetic purposes.

  • 457.
    Sterner, Marion
    et al.
    Gruppo X di X Gruppo, Italy.
    Magnusson, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy.
    Innovative paper-technology for novel longitudinally corrugated layers2017In: PaperCon 2017 / [ed] TAPPI, 2017Conference paper (Other academic)
  • 458.
    Sterner, Marion
    et al.
    Research and Development for Gruppo X di X Gruppo Srl, Italy.
    Magnusson, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
    Innovative technology for making improved paper from the poorest fibers2017In: TAPPI Journal, ISSN 0734-1415, Vol. 16, no 11, p. 633-637Article in journal (Refereed)
    Abstract [en]

    The trademarked Papermorphosis technology, consisting of two novel units for separately increasing cross direction (CD) and machine direction (MD) elongation over purely mechanical processes, has been successfully tested on recycling fiber, reaching high elongation values in each direction of over 15% in CD or 20% in MD. Increase of elongation has also had a positive influence on the relative tensile energy absorption (TEA) values in CD and MD. It is well known that mechanical properties in paper basically depend on fiber choice, headbox properties, and refining. With the novel system, elongations in cross direction (CD) and machine direction (MD) can be individually customized, even in paper grades with lower strength deriving from recycled fiber. Customizing elongations also has the effect of improving or better balancing TEA values in both directions. The aim is to improve existing recycling papers and to broaden the use of recycling fiber with respect to the past.

  • 459.
    Stevanic, Jasna S.
    et al.
    RISE, STFI-Packforsk.
    Salmen, Lennart
    RISE, STFI-Packforsk.
    Characterizing wood polymers in the primary cell wall of Norway spruce (Picea abies (L.) Karst.) using dynamic FT-IR spectroscopy2008In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 15, no 2, p. 285-295Article in journal (Refereed)
    Abstract [en]

    Dynamic Fourier Transform Infra-Red (FT-IR) spectroscopy was used to examine the interactions among cellulose, xyloglucan, pectin, protein and lignin in the outer fibre wall layers of spruce wood tracheids. Knowledge regarding these interactions is fundamental for understanding the fibre separation in a mechanical pulping process. Sheets made from an enriched primary cell wall material were used for studying the viscoelastic response of the polymers. The results indicated that strong interactions exist among lignin, protein, pectin, xyloglucan and cellulose in the primary cell wall. This signified a closely linked network structure of the components on the fibre surface. This ultrastructural arrangement in the primary cell wall and the relatively high content of lignin, pectin and protein in it, means that the primary cell wall is more submissive to selective chemical attacks, when compared to the secondary cell wall. A low ratio of cellulose Iα to cellulose Iβ in the primary cell wall was also found.

  • 460.
    Ström, Göran
    et al.
    RISE, STFI-Packforsk.
    Karathanasis, Michael
    RISE, STFI-Packforsk.
    Relationship between ink film topography and print gloss in offset prints on coated surfaces2008In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 23, no 2, p. 156-163Article in journal (Refereed)
    Abstract [en]

    Model coatings with different micro roughness but similar and low macro roughness were prepared and laboratory printed. The coating micro roughness strongly affected the print gloss at low inking levels, corresponding to one or two full tone layers. The effect of coating micro roughness decreased with ink amount and was insignificant at inking levels of 3-4 g/m2, which corresponds roughly to three to four full tone layers. A strong correlation between ink film micro roughness and print gloss was established. Remaining ink filament patterns that had survived the ink levelling process were observed with a fast-setting coating but not with a slow-setting coating. The amplitude of the filaments was a few tenths of a urn only and was strongly dependent on ink amount. The filaments were observed in wavelength bands between 15 and 125 ÎŒm, which can be regarded as a sub-macro roughness region. Their impact on print gloss was estimated on some 6 gloss units.

  • 461.
    Sturges, Michael
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, RISE UK Ltd.
    Kay, Martin
    RISE - Research Institutes of Sweden, Bioeconomy, RISE UK Ltd.
    Johansson, Malin
    RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging.
    BioPackLCA – Closing the gap: Extending LCA to reflect the sustainability contributions of bio-based packaging2019Report (Other academic)
    Abstract [en]

    Existing LCA methods (especially impact categories considered) do not always include some of the environmental interventions that are unique to bio-based materials. Subsequently, this report to investigates areas where LCA impact assessment methodology can be enhanced or expanded in order to fully account for the environmental advantages and disadvantages of bio-based packaging materials. The work focuses on impact assessment areas most pertinent to three of the highest-profile environmental policy objectives of the day, i.e. climate change, single-use plastics and microplastics generation. Subsequently, recommendations are made with regards to the application of the global warming potential impact category when conducting LCA studies comparing bio-based and other packaging materials, and proposals are presented for simplified impact categories for littering potential and microplastics generation potential.

  • 462.
    Stålbrand, Henrik
    et al.
    Lund university, Sweden.
    Lundqvist, Jon
    Lund university, Sweden.
    Andersson, Alexandra
    Lund university, Sweden.
    Hägglund, Per
    Lund university, Sweden.
    Anderson, Lars
    Lund university, Sweden.
    Tjerneld, Folke
    Lund university, Sweden.
    Jacobs, Anna
    STFI.
    Teleman, Anita
    STFI.
    Dahlman, Olof
    STFI.
    Palm, M.
    Lund university, Sweden.
    Zacchi, G.
    Lund university, Sweden.
    Isolation, Characterization, and Enzymatic Hydrolysis of Acetyl-Galactoglucomannan from Spruce (Picea abies)2004In: Hemicelluloses: Science and Technology, American Chemical Society (ACS), 2004, chapter 5, p. 66-78Chapter in book (Refereed)
  • 463. Svedberg, A.
    et al.
    Lindström, T.
    RISE, Innventia.
    Improvement of the retention-formation relationship using three-component retention aid systems2012In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, no 1, p. 86-92Article in journal (Refereed)
  • 464. Svensson, A.
    et al.
    Larsson, P.T.
    RISE, Innventia.
    Salazar-Alvarez, G.
    Wågberg, L.
    Preparation of dry ultra-porous cellulosic fibres: Characterization and possible initial uses2013In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, no 1, p. 141-783Article in journal (Refereed)
  • 465. Svensson, A.
    et al.
    Lindström, T.
    RISE, Innventia.
    Ankerfors, M.
    RISE, Innventia.
    Östlund, S.
    3D-shapeable thermoplastic paper materials2013In: Nordic Pulp and Paper Research Journal, ISSN 0283-2631 , no 4, p. 602-610Article in journal (Refereed)
  • 466.
    Svensson, Elin
    et al.
    Chalmers University of Technology, Sweden.
    Lundberg, Valeria
    RISE, Innventia. Chalmers University of Technology, Sweden.
    Jansson, Mikael
    RISE, Innventia.
    Xiros, Charilaos
    Chalmers University of Technology, Sweden.
    Berntsson, Thore
    Chalmers University of Technology, Sweden.
    The effect of high solids loading in ethanol production integrated with a pulp mill2016In: Chemical engineering research & design, ISSN 0263-8762, E-ISSN 1744-3563, Vol. 111, p. 387-402Article in journal (Refereed)
    Abstract [en]

    In this paper, two ethanol processes integrated with a softwood pulp mill are compared with regard to their steam demand, process integration potential and profitability. The processes differ in the solids loading in the simultaneous saccharification and fermentation step and in the resulting ethanol concentration. The results show that a higher ethanol concentration does not necessarily lead to significant reductions in steam demand. Instead, it is demonstrated that the steam demand for distillation is highly dependent on the design of the distillation plant. Nevertheless, a higher solids loading (high gravity) can be beneficial for the treatment of the stillage from the distillation plant. A higher solids loading results either in a lower steam demand for evaporation of the stillage or possibly in a reduced demand for effluent treatment compared to a conventional solids loading process. While the results show that a higher ethanol concentration leads to advantages in energy costs and investment costs for the distillation plant, they also show that the potential benefits of a high-gravity process are offset by the expected decrease in ethanol yield, which leads to higher raw material costs.

  • 467.
    Svärd, Antonia
    et al.
    KTH Royal Institute of Technology, Sweden.
    Moriana, Rosana
    KTH Royal Institute of Technology, Sweden; University Skövde, Sweden.
    Brännvall, Elisabet
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Edlund, Ulrica
    KTH Royal Institute of Technology, Sweden.
    Rapeseed Straw Biorefinery Process2019In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 7, no 1, p. 790-801Article in journal (Refereed)
    Abstract [en]

    A rapeseed straw biorefinery process was demonstrated with more than 50% of the straw recovered as products. Xylan with a weight-average molecular weight of 56 760 g/mol was extracted in an alkaline step. The straw residue was subjected to soda pulping, resulting in cellulose-rich fibers and a lignin-rich liquid fraction. The lignin contained syringyl and guaiacyl aromatic structural units in a 1/0.75 ratio. The cellulose pulp was bleached, resulting in a cellulose fraction of 85% purity and a crystallinity index (CI) of 83%. Two grades of nanocellulose, CNF and CNC, were isolated from the bleached pulp. The CNF was very heterogeneous in size with an average diameter of 4 nm and an average length of 1177 nm. The CNC had an average diameter of 6 nm and an average particle length of 193 nm. CNF and CNC had good thermal stability and an aspect ratio of 294 and 32, respectively.

  • 468.
    Syverud, Kristin
    et al.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Alexandrescu, L.
    Gatti, A.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Biocompatibility studies of nanofibril structures based on Eucalyptus and Pinus radiata pulp fibres2012Conference paper (Refereed)
  • 469.
    Syverud, Kristin
    et al.
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Chinga-Carrasco, Gary
    RISE, Innventia, PFI – Paper and Fiber Research Institute.
    Toledo, J.
    Toledo, P.G.
    A comparative study of Eucalyptus and Pinus Radiata pulp fibres as raw materials for production of cellulose nanofibrils2011In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 84Article in journal (Refereed)
  • 470.
    Söderberg, Daniel
    RISE, STFI-Packforsk.
    A new technique for stratified forming2008In: Paper Conference and Trade Show: PaperCon '08, TAPPI Press, 2008, Vol. 6, p. 3529-3563Conference paper (Refereed)
    Abstract [en]

    A new technique for stratified forming has been developed where a thin passive liquid layer (a liquid vane or "Aq-vane") is injected in the between neighbouring pulp streams through a narrow hollow channel, thereby preventing mixing between the layers. The Aq-vanes have been implemented in extensive pilot scale trials where the technical solution has been tested and evaluated. In addition, the impact of this new technique and sheet stratification on product properties has been evaluated.

  • 471.
    Söderberg, Daniel
    RISE, Innventia.
    DryPulp for cure-formed paper2013Conference paper (Refereed)
  • 472.
    Söderberg, Daniel
    et al.
    RISE, STFI-Packforsk.
    Holmqvist, Claes
    RISE, STFI-Packforsk.
    A novel system for online wet-end web monitoring2008In: Paper Conference and Trade Show: PaperCon '08, 2008, Vol. 5, p. 2876-2907Conference paper (Refereed)
    Abstract [en]

    An imaging-based system has been developed for online web analysis in the wet end of both fourdrinier and twin-wire machines. Consecutive images can be stitched together to a continuous map of the fibre mat along the machine direction. The functionality has been verified through comparisons with offline measurements of the formation. Experiences from several mill installations prove that the system is capable of monitoring formation and detect quality degrading web features, enabling optimization and troubleshooting.

  • 473.
    Söderberg, Daniel
    et al.
    RISE, STFI-Packforsk.
    Tammisola, O.
    The fundamental mechanism behind headbox jet break-up2008In: Paper Conference and Trade Show: PaperCon '08, 2008, Vol. 6, p. 3564-3596Conference paper (Refereed)
    Abstract [en]

    It has previously been shown that MD streaks are created in the headbox jet, which is closely connected to the appearance of waves on the jet surface. The fundamental mechanism behind this break-up is presented. This has been achieved by implementing state-of-the-art methods for determining the characteristics and evolution of hydrody-namic instabilities. The methodology also allows the headbox slice to be designed in order to minimise jet break-up. This possibility has been evaluated in pilot-scale.

  • 474.
    Tanase-Opedal, Mikaela
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, PFI.
    Eriksen, Öyvind
    RISE - Research Institutes of Sweden, Bioeconomy, PFI.
    Toven, Kai
    RISE - Research Institutes of Sweden, Bioeconomy, PFI.
    Increase accessibility for enzymatic hydrolysis of Norway spruce by organosolv pre-treatment in a novel reactor2018In: The 8th Nordic Wood Biorefinery Conference: NWBC 2018: proceedings / [ed] Hytönen Eemeli, Vepsäläinen Jessica, Espoo: VTT Technical Research Centre of Finland , 2018, p. 177-177Conference paper (Refereed)
  • 475.
    Teleman, Anita
    et al.
    STFI.
    Nordström, Maria
    STFI.
    Tenkanen, Maija
    VTT, Finland.
    Jacobs, Anna
    STFI.
    Dahlman, Olof
    STFI.
    Isolation and characterization of O-acetylated glucomannans from aspen and birch wood2003In: Carbohydrate Research, ISSN 0008-6215, E-ISSN 1873-426X, Vol. 338, no 6, p. 525-534Article in journal (Refereed)
  • 476.
    Teleman, Anita
    et al.
    STFI.
    Tenkanen, Maija
    VTT, Finland.
    Jacobs, Anna
    STFI.
    Dahlman, Olof
    STFI.
    Characterization of O-acetyl-(4-O-methylglucurono)xylan isolated from birch and beech2002In: Carbohydrate Research, ISSN 0008-6215, E-ISSN 1873-426X, Vol. 337, no 4, p. 373-377Article in journal (Refereed)
  • 477. Testova, L.
    et al.
    Borrega, M.
    Tolonen, L.K.
    Penttila, P.A.
    Serimaa, R.
    Larsson, P.T.
    RISE, Innventia.
    Sixta, H.
    Dissolving-grade birch pulps produced under various prehydrolysis intensities: Quality, structure and applications2014In: Cellulose (London), ISSN 0969-0239, E-ISSN 1572-882X, Vol. 21, no 3, p. 2007-2021Article in journal (Refereed)
  • 478.
    Thorman, Sofia
    et al.
    RISE, Innventia.
    Yang, Li
    RISE, Innventia.
    Hagberg, Anni
    RISE, Innventia.
    Simultaneous determination of absorption mottle and white-top mottle in the same area on coated boards2013Conference paper (Refereed)
  • 479.
    Tomani, P.
    et al.
    RISE, Innventia.
    Axegård, P.
    RISE, Innventia.
    Berglin, N.
    RISE, Innventia.
    Lovell, A.
    RISE, Innventia.
    Nordgren, D.
    RISE, Innventia.
    Integration of lignin removal into a kraft pulp mill and use of lignin as a biofuel2011In: Cellulose Chemistry and Technology, ISSN 2457-9459, no 7-8, p. 533-540Article in journal (Refereed)
  • 480.
    Tomani, Per
    RISE - Research Institutes of Sweden, Bioeconomy.
    The LignoCity initiative2017In: The 7th Nordic Wood Biorefinery Conference held in Stockholm, Sweden, 28-30 Mar. 2017: NWBC 2017, Stockholm: RISE Bioekonomi , 2017, p. 76-81Conference paper (Other academic)
    Abstract [en]

    The LignoCity Initiative is one of the existing test beds within the Environmental Technology topic, a part of "Testbed Sweden" and serves the need for infrastructure to upscale processes for lignin separation, purification and modification and/or lignin-based products and applications. The initiative offers help in the upscaling phase, with the aim of shortening the time to market for ideas. The main focus is to promote new lignin applications, although different new lignin separation unit operations and processes are other possible upscaling collaboration activities. The LignoCity test bed project operations are based at the site of the RISE LignoCity Demo AB facility, formerly LignoBoost Demo AB. The main equipment comprises two parallel precipitation lines where carbon dioxide is added and tank volumes for maturation of the precipitation with the aim of improving filtration properties. There are also two parallel vacuum belt filters for dewatering of lignin and one chamber press filter for filtration, washing and dewatering. There are also different storage tanks for chemicals and tank volumes for the process operation, as well as a computerised process control system. Examples of additional equipment usually rented for different studies include a pilot scale membrane filtration unit with ceramic membranes and a pilot scale centrifuge.

  • 481.
    Tomani, Per
    RISE, Innventia.
    The LignoCity Initiative2016In: Tappi PEERS 2016, 2016Conference paper (Other academic)
    Abstract [en]

    An important step when developing new processes and products is upscaling, i.e., taking the innovation through the lab-, pilot-, and demo-scale stages. During the demo-scale stage, important strengths and weaknesses in what you are trying to develop are revealed, clearly defining the challenges you face. The LignoCity Initiative invites R&D&I participants to contribute to the fields of lignin separation, lignin upgrading/purification, and lignin applications by helping define and create an open innovation site for upscaling new ideas.. The place offering these opportunities is the same site where the LignoBoost process was demonstrated. It provides a very flexibleenvironment where different processes or unit operations along different lignin value-chains can be up-scaled. The region and municipality where the site is located, as well as the regional university and local, regional, national and international companies are involved as partners in the LignoCity Initiative.

  • 482.
    Tomani, Per
    et al.
    RISE, Innventia.
    Axegård, Peter
    RISE, Innventia.
    Lignin from kraft pulp mills and the potential for future use in carbon fibres (slides only)2012Conference paper (Refereed)
  • 483.
    Tomani, Per
    et al.
    RISE, Innventia.
    Berglin, Niklas
    RISE, Innventia.
    Axegård, Peter
    RISE, Innventia.
    The lignoboost process and use of lignin as a new bio-fuel2009In: TAPPI Press - TAPPI Engineering, Pulping and Environmental Conference 2009 - Innovations in Energy, Fiber and Compliance, TAPPI Press, 2009, Vol. 4, p. 2347-2393Conference paper (Refereed)
    Abstract [en]

    A process for lignin removal from alkaline pulping liquors (black liquors) has been developed further in the FRAM2 R&D Program (Future Resource Adapted Pulp Mill, part 2). The lignin product from a demonstration plant, which is owned and operated by Innventia (formerly STFI-Packforsk), was characterized and used in different combustion trials with good results - a co-firing of lignin and bark in a fluidized bed boiler, a co-firing with coal in a PFBC boiler (Pressurized Fluidized Bed Combustion boiler) and a firing of lignin in a full-scale lime kiln. The process development and operation of the demonstration plant has displayed good results in many ways since 2007. Runnability in the demonstration plant and the lignin quality have both been very good. Work done on the investment and operational costs showed great potential for improving the concept of economy, which is already good.

  • 484.
    Tomani, Per
    et al.
    RISE, Innventia.
    Sjöholm, Elisabeth
    RISE, Innventia.
    Lignin separation from pulp mills and potential use in different applications2015Conference paper (Other academic)
    Abstract [en]

    Pulp mill biorefining is still a relatively young area in modern pulping R&D driven by megatrends such as big variations in cost for fossil oil and increased cost for wood, but also increased competition on the pulp market. The need for new revenues is obvious if the pulp and paper industry is to maintain its strong position. Biorefining can simplified be defined as the efforts to reach as complete utilization of wood raw material as possible in a pulp mill to reach as high revenues as possible. A pulp mill producing chemical pulp is for several reasons an excellent an industrial platform for biorefining. The chemical pulp mill is able to produce relatively pure cellulose, hemicelluloseand lignin.Lignin removal from kraft black liquors has been developed to a commercial process (the LignoBoost process) in cooperation between Innventia and Chalmers University of Technology. The technology was sold to Valmet 2008 and there are now two full-scale installations in operation. One installation in USA by Domtar (25000 t/y) and one in Finland by Stora Enso (50000 t/y). Lignin separation, purification, modification and applications have since many years back in time a high priority in R&D work at Innventia. The focus for this poster is on separation of lignin from kraft pulp black liquors and the potential to use this ligninin different applications. Promising results have been obtained with for example industrial dispersing applications, activated carbon and carbon fibres.

  • 485.
    Trost, Thomas
    et al.
    RISE, Innventia.
    Alfthan, Johan
    RISE, Innventia.
    Corrugated boxes and transportation demands: a feasibility study2015Conference paper (Other academic)
    Abstract [en]

    The exporting industry has problems finding the right transport packaging materials and solutions for export to different markets. Many different standards exist for different purposes. On the other hand, there are missing standards in some cases, e.g. high humidity and creep. Also, each industry branch has different requirements and demands. From the industry’s point of view there is a wish to specify how the packages will be used and which environmental hazards they have to withstand. Performance of the box is important, not the specific paper properties, even if they affect the performance.This presentation will clarify some of the problems the users of corrugated packaging have and ways to improve the situation in an effort for "real optimized" transport packaging. Different test methods for corrugated will be presented and compared with the industries needs on transport packaging. Test methods will be covered at paper level, board level and box level.

  • 486.
    Trost, Thomas
    et al.
    RISE, Innventia.
    Alfthan, Johan
    RISE, Innventia.
    Performance and test methods for corrugated board packagingConference paper (Other academic)
  • 487.
    Trost, Thomas
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy.
    Alfthan, Johan
    RISE - Research Institutes of Sweden, Bioeconomy.
    The real world of corrugated: focus on packaging performance2017In: 28th IAPRI Symposium on packaging, 2017, p. 136-141Conference paper (Refereed)
  • 488.
    Trost, Thomas
    et al.
    RISE, Innventia.
    Rättö, Peter
    RISE, Innventia.
    Blohm, Erik
    RISE, Innventia.
    A new approach to study wear of printed packaging surfaces2013Conference paper (Refereed)
  • 489.
    Trost, Thomas
    et al.
    RISE, Innventia.
    Rättö, Peter
    RISE, Innventia.
    Blohm, Erik
    RISE, Innventia.
    Packaging wear during transport simulation: comparison between laboratory coated samples and commercial samples2013Conference paper (Refereed)
  • 490.
    Tryding, Johan
    et al.
    Lund University, Sweden; Tetra Pak, Sweden.
    Marin, Gustav
    RISE - Research Institutes of Sweden, Bioeconomy.
    Nygårds, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy. RISE, Innventia.
    Mäkelä, Petri
    BillerudKorsnäs, Sweden.
    Ferrari, Guilio
    Tetra Pak, Italy.
    Experimental and theoretical analysis of in-plane cohesive testing of paperboard2017In: International journal of damage mechanics, ISSN 1056-7895, E-ISSN 1530-7921, Vol. 26, no 6, p. 895-918Article in journal (Refereed)
    Abstract [en]

    In-plane cohesive failure of paperboard was characterized by short-span uniaxial tension tests. Six paperboards’ qualities were experimentally investigated, from which cohesive stress-widening curves were extracted. A fracture energy was defined, expressed in the tensile strength and maximum slope of the cohesive stress-widening relation. Analytical cohesive relations were derived based on the tensile strength and maximum slope, utilizing the Morse potential for diatomic molecules. It was experimentally found that the maximum slope and fracture energy depend on the tensile strength. The ratio of the maximum slope to the elastic modulus (stable length) was shown to be independent of the tensile strength.

  • 491. Ture, H.
    et al.
    Gällstedt, M.
    RISE, Innventia.
    Johansson, E.
    Hedenqvist, M.S.
    Wheat-gluten/montmorillonite clay multilayer-coated paperboards with high barrier properties2013In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, p. 1-6Article in journal (Refereed)
  • 492.
    Tysen, Aron
    RISE, Innventia.
    TAD: the influence of grammage, formation and pulp type on non-uniform drying and air flow2015Conference paper (Other academic)
  • 493.
    Tysen, Aron
    et al.
    RISE, Innventia.
    Vomhoff, Hannes
    RISE, Innventia.
    Method for the quantification of in-plane drying nonuniformity2015In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 30, no 2, p. 286-295Article in journal (Refereed)
    Abstract [en]

    A method has been developed in order to determine the in-plane non-uniformity of drying of wet paper samples dried by an air flow. The surface temperature of the samples, recorded by an infrared camera, is used to determine a mean drying time and the local drying time of each pixel. Based on the initial dryness and the mean drying time, a mean drying rate can be obtained, and furthermore, the drying time of each pixel can be presented as a 2-dimensional map. Apart from conventional statistical information on the variation in drying time, the map also gives information regarding the size and shape of the drying non-uniformity. The pressure drop over the sample and the air flow rate through the sample were used to calculate a flow resistance as a function of grammage. Laboratory sheets with grammages between 15 and 45 g/m2, made from an unrefined bleached chemical hardwood pulp, were analysed. A considerable variation in local drying time was observed, despite their anticipated uniform formation. The mean drying time increased linearly with increasing grammages, thus the mean drying rate was not dependent on grammage. The flow resistance of the sheets increased with increasing grammage. The air flow rate through the sheet appeared not to be critical for the drying rate at the given experimental conditions.

  • 494.
    Tysen, Aron
    et al.
    RISE, Innventia.
    Vomhoff, Hannes
    RISE, Innventia.
    Nilsson, Lars
    Karlstad University, Sweden.
    The influence of grammage and pulp type on through air drying2015In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669, Vol. 30, no 4, p. 651-659Article in journal (Refereed)
    Abstract [en]

    The influence of grammage and pulp type on through air drying was studied. The temperature of a sample was measured during the drying process and the observed temperature changes were used to evaluate the drying process. Laboratory sheets with grammages 15-60 g/m2, from two softwood and two hardwood bleached chemical pulps were used. All samples were analysed with respect to formation, flow resistance, modified permeability, mean drying time, non-uniformity of drying time, and area- and mass-specific drying rate. The pulps had different modified permeabilities but showed similar behaviour when analysed as a function of grammage. A constant value was found for higher grammages, while an increase in modified permeability was found at decreasingly low grammages. Almost all pulp and grammage combinations had similar areaspecific drying rates, but the mass-specific drying rates decreased with grammage. However, the samples with lower grammages had mass specific drying rates independent of modified permeability, where samples with increasing grammage showed an increasing dependency. This implies that the drying efficiency at low grammages was not controlled by the volume flow of the drying air. A good correlation was found between energy needed to evaporate water and energy supplied by the drying air as estimated from the surface temperature and air flow measurement. The surface temperature can therefore be used to quantify the drying process.

  • 495.
    Tysen, Aron
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy.
    Vomhoff, Hannes
    Holmen, Sweden.
    Nilsson, Lars
    Karlstad university, Sweden.
    Through air drying assisted by infrared radiation: The influence of radiator power on drying rates and temperature2018In: Nordic Pulp & Paper Research Journal, ISSN 0283-2631, E-ISSN 2000-0669Article in journal (Refereed)
    Abstract [en]

    The use of infrared radiation for heating the web in the through air drying process was investigated in lab scale. The hypothesis was that infrared radiation should be a more efficient method to transfer drying energy to the wet web compared to hot air, but that a certain air flow is still required as a transport medium for the evaporated water. A trial program comprising handsheets made of two types of bleached chemical pulps, five grammages (15, 22, 30 and 60 g/m2), and dried with five radiator power levels was performed on a lab scale through air drying equipment. Drying times of the samples were determined from temperature data recorded with an infrared camera. The use of infrared radiation shortened drying times, especially for low grammage samples. The shortening of the drying time ranged between 10 and 45 %. The most substantial shortenings were obtained for the lowest grammages and the highest radiator power level. However, the increase of power did not linearly shorten drying time. After an initial shortening at the lowest power level, the positive effect of the IR heating decreased as the power was further increased.

  • 496.
    Uhlin, Anders
    et al.
    RISE, Innventia.
    Danielsson, Sverker
    RISE, Innventia.
    Johansson, Therese
    Sivert, Åsa
    Membrane filtration of pulp mill effluents2014Conference paper (Refereed)
  • 497.
    Uhlin, Anders
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Åkerström, Mårten
    RISE - Research Institutes of Sweden, Bioeconomy.
    Schweinebarth, Hannah
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Baker, Darren A
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Danielsson, Sverker
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Tomani, Per
    RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
    Kraft lignin based carbon fibres2017In: The 7th Nordic Wood Biorefinery Conference held in Stockholm, Sweden, 28-30 Mar. 2017: NWBC 2017, Stockholm: RISE Bioekonomi , 2017, p. 258-259Conference paper (Refereed)
    Abstract [en]

    Research has been carried out at RISE Bioeconomy into converting lignin to carbon fibres, focusing on melt spinning of kraft lignin to filaments, which were subsequently converted to carbon fibres. New equipment has been installed to improve the properties of the lignin based carbon fibres and now it is possible to produce carbon fibres with equal or even better properties compared with published data on lignin based carbon fibres. For a melt spun softwood kraft lignin that was converted to carbon fibres, the tensile strength had an average value of 952MPa, while the Young's modulus average value was 69GPa. A toy car demonstrator has been produced in a project financed by the Bioinnovation, a research programme by VINNOVA, Formas and the Swedish Energy Agency. The existing roof of the car was replaced with one consisting of a carbon fibre composite, in which the carbon fibres were made of 100% softwood kraft lignin. A lithium ion battery as also installed into the toy car, having a negative electrode containing lignin based carbon fibres

  • 498.
    Upadhyaya, Manu
    et al.
    RISE - Research Institutes of Sweden, Bioeconomy.
    Nygårds, Mikael
    RISE - Research Institutes of Sweden, Bioeconomy.
    A finite element model to simulate brim forming of paperboard2017In: 28th IAPRI Symposium on packaging, 2017, p. 395-408Conference paper (Other academic)
  • 499.
    Valdebenito, Fabiola
    et al.
    Center for Advanced Polymers Research, Chile; La Frontera University, Chile.
    Pereira, Miguel
    University of Concepcion, Chile.
    Ciudad, Gustavo
    La Frontera University, Chile.
    Azocar, Laura
    La Frontera University, Chile.
    Briones, Rodrigo
    Center for Advanced Polymers Research, Chile.
    Chinga-Carrasco, Gary
    RISE - Research Institutes of Sweden, Bioeconomy, PFI. La Frontera University, Chile.
    On the nanofibrillation of corn husks and oat hulls fibres2017In: Industrial crops and products (Print), ISSN 0926-6690, E-ISSN 1872-633X, Vol. 95, p. 528-534Article in journal (Refereed)
    Abstract [en]

    Cellulose nanofibrils (CNF) were isolated from agro-industrial waste (corn husks and oat hulls) and market kraft pulp fibres, and a detailed comparative study was performed. Initially, the raw materials were subjected to a conventional pulping process to remove lignin and hemicelluloses. The chemical pre-treatment was based on 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-mediated oxidation and the mechanical treatment was carried out with a high-pressure homogenizer. An extensive characterization of the raw material and of the nanofibrillated celluloses was performed, considering structural and chemical aspects. CNF films were produced for their characterization by optical methods, laser profilometry (LP), scanning electron microscopy (SEM), and atomic force microscopy (AFM). Considering the same pulping and chemical pre-treatment, the analyses indicated that the oxidized corn husks fibres had higher carboxylate content and thus a larger tendency to nanofibrillate compared to the oat hulls fibres. The obtained content of carboxylic acids was directly proportional to the content of cellulose in the assessed samples, confirming the selectivity of the TEMPO-mediated oxidation. The fibrillated corn husks material had a minor fraction of residual fibres (<4%) and homogeneous nanofibril width distribution (<20 nm), which is a major achievement. The homogeneous CNF morphology was confirmed by AFM analysis. Hence, this study demonstrates that the assessed agro-industrial wastes are sustainable resources for production of CNF, which may have a wide range of value-added applications.

  • 500. Varhimo, A
    et al.
    Hoffstedt, Christian
    RISE, Innventia.
    Samuelsson, Åsa
    RISE, Innventia.
    Helin, T
    Suurnakki, A
    Extraction of xylan from bleached hardwood kraft pulp2014Conference paper (Refereed)
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