Developments for boosting the implementation of microfibrillated cellulose in papermaking

Transcription

1 Developments for boosting the implementation of microfibrillated cellulose in papermaking Mikael Ankerfors, Tom Lindström, and Daniel Söderberg Innventia AB SPCI Convention September 26, 2013

2 Nomenclature Microfibrillated cellulose (MFC) Original name since the 1980 s Nanocellulose = Collective name for all types of nanocellulose. Used for this material the last 6 years. Other nanocelluloses are NanoCrystalline Cellulose (NCC) and Bacterial NanoCellulose (BNC) Nanofibrillated cellulose (NFC) = new name started to be used 4-5 years ago

3 Elementary fibril aggregates in wood-fibres Source: Daniel, G., Volc, J., Niku-Paavola, M.-L. (2004). Cryo-FE-SEM & TEM immuno-techniques reveal new details for understanding white-rot decay of lignocellulose. C. R. Biologies 327, Mikael Ankerfors, Innventia AB

4 Organisation of cellulose in fibres Adapted from: Rowland and Roberts

5 Why is it interesting? Cellulose crystallite E 140 GPa Source: Hongu, T and Phillips, G.O. (1997). New Fibres, Woodhead publishing

6 MFC in the 1980 s Energy consumption = kwh/tonne MFC Homogenisation Pulp Source: Lindström, T. and Winter, L. (1988). Mikrofibrillär cellulosa som komponent vid papperstillverkning. STFImeddelande C159 (internal STFI-report) Source: Turbak, A.F., Snyder, F.W. and Sandberg, K.R. (1983). J. Appl. Pol. Sci.: Appl. Pol. Symp. 37:

7 Our solution pre-treatments Energy consumption = kwh/tonne Energy reduction = % MFC Homogenisation Mechanical & Enzyme treatment Pulp

8 Example of an MFC gel from Innventia MFC gen. 1 Mikael Ankerfors, Innventia AB w-%

9 Cryo-TEM Image of Innventia s MFC Source: Wågberg, L., Decher, G., Norgren, M., Lindström, T., Ankerfors, M. Axnäs, K.. The Build-Up of Polyelectrolyte Multilayers of Microfibrillated Mikael Ankerfors, Cellulose Innventia AB and Cationic Polyelectrolytes. Langmuir 2008, 24,

10 The Innventia lab-scale nanofacility

11 Innventia s pilot plant for MFC production (100 kg/day) Mikael Ankerfors, Innventia AB

12 Innventia s pilot scale nanofacility

13 Standard process layout Pulp Enzyme MFC

14 Innventia s stock-prep system for FEX Mikael Ankerfors, Innventia AB

15 Stress-strain curves for films of different MFCs Nanopaper : Strongest cellulose-based material made by man Source: Henriksson, M., Berglund, L.A., Isaksson, P., Lindström, T., Nishino, T. Cellulose Nanopaper Structures of High Toughness. Biomacromolecules 2008, 9, Source: Fellers et al. (1983) Carton board. Profitable use of pulps and processes. Pulp Stress at brake [MPa] Young s Modulus [GPa] Strain at break [%] Nanopaper ~ Unbl. kraft Bl. kraft SW Bl. kraft HW Newsprint Ground wood

16 MFC has interesting for paper applications As a dry strength agent enabling e.g. Increased filler content in publication papers Weight-reduction in board As an oxygen barrier material for packaging As an additive in coatings As a surface strength agent to reduce linting and dusting

17 MFC used as dry strength agent old news MFC wet-end addition to CTMP MFC Tensile index (knm/kg) Fines C-starch Added amount (%) Source: Lindström, T. and Winter, L. (1988). Mikrofibrillär cellulosa som komponent vid papperstillverkning. STFI-meddelande C159 (internal STFI-report)

18 Pilot trial outline Goal Use MFC as additive in the FEX-system in order to identify possible weaknesses/needs Set-up Fine paper pulp composition 80/20 (short/long) STFI-former (roll-blade) Valmet 7-row headbox Speed 600 m/min and slice opening 14 mm Press loads 60/500/700 kn/m Innventia s pilot MFC generation 1 PCC as 20%-35% Retention system from Eka

19 FEX pilot paper machine Fourdrinier former Shoe presses Roll-blade former Conventional press

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21 Conclusions No major processing issues! Positive effects can be seen In order to perform trials and compare effects to what can be achieved by chemical additives: Dosage strategy should be developed Effects of process units (screens, pumps, pipes etc.) need to be considered since the physics will be different compared to polymer additives Innventia is equipped to study these effects

22 Our goal To assist industrial partners to produce and use MFC in industrial scale To further improve the MFC product and its processes With the aid of the FEX-pilot paper machine, optimise the use of MFC in paper applications Targeted applications: Also: Strength additive for paper and board Barrier material for replacement of aluminium foils Bio-nanocomposites Nanopapers High-tech materials Aerogels Food applications Misc

23 The next step

24 The next step Development of a demonstration scale movable MFC factory to enable full scale trials at e.g. paper mills

25 Idea pitch Contact information Mikael Ankerfors Tom Lindström Daniel Söderberg Mikael Ankerfors, Daniel Söderberg, Tom Lindström, Fredik Rosén, Per Tomani Magnus Björkman