Young Researchers: European Paper Industry Innovation Hub

Transcription

1 Young Researchers: European Paper Industry Innovation Hub 22 November h00-18h00

2 Technical Research Centre of Finland Ltd Annika Ketola Modifying fibre-fibre contacts for better elongation of fibre network VTT Technical Research Centre of Finland Ltd Annika Ketola Research Scientist VTT Technical Research Centre of Finland Ltd Fibres and biobased materials GSM

3 ExtBioNet project in short Development of extensible bio-based fibre networks by tailoring fibre-fibre interactions Project period: (36 months) My part as a PhD student: Project members: VTT members: Ketola, A., Retulainen, E., Kouko, J., Oksanen, A. and Salminen, K. Åbo Akademi members: Sundberg, A and Anders Strand

4 Main objective: Bio-based moldable fibre networks Competitive alternative for oil-based materials Requirements More deformable, stronger and light-weight and material for example packaging and composites Bio-based: renewable, recyclable, biodegradable Reasonable costs (material and equipment) Moldable paperboard packages Unbiodegradable waste from plastic packages

5 Effect of cellulose nano fibers (CNF) on fibre bonding and paper mechanical properties Elasticity, deformability, strength Inter-fibre bonding Extensibility of paper Straining conditions Single fibre properties Structure of the fibre network Fibre joint strength Bonded area Compliance of bonds Chemical modifications and additives MASUKO TEMPO A gel like layer Inter-diffusion Fibre surface modification with CNF Addition to pulp suspension Spray application onto wet paper

6 Results and other research topics Results so far Addition to pulp suspension: Bulky CNF (MASUKO) improved shrinkage and strain at break Anionic CNF (TEMPO) improved tensile index Spray application onto wet paper: Anionic CNF (TEMPO) improved shrinkage and strain at break Rheology of CNF CNF as a model material for fibre surface gel X-ray nanotomography (nanoct) The structure and the contact area of individual fibre crossings Video Univeristy of Jyväskylä Helium Ion Microscope (HIM) Univeristy of Jyväskylä

7 Benefits Reduction of environmental load The potential to improve the properties of current products Higher value paper products More broaden design possibilities A completely new product sector in packaging materials New types of packages and packaging lines Use of continuous webs and combination of several process phases in one continuous line (form-fill-seal ) Future design? From rectangular boxes to more complex and rounded shapes

8 Technical Research Centre of Finland Ltd Thank you Acknowledgements for Academy of Finland for providing financial support for this work

9 APPENDIX I: CNF properties NFC Properties Abundant, natural nanomaterials Renewable, biodegradable & biocompatible High strength & modulus High thermal stability Lightweight Optical transparency High water binding capability High aspect ratios & high surface area Opportunities for chemical modification (surface OH) GRADE: N240 standard native premium Initial material: Never dried birch kraft pulp Pre-refining in Masuko MKZA10-15J, one pass Fibrillation: Microfluidizer M , 5 passes Produced at VTT (Espoo) GRADE: R3 standard anionic premium (TEMPOoxidized) Initial material: Never dried birch kraft pulp Fibrillation method: Microfluidizer M , 2 passes Sample ID Turbidity (NTU) ph Dry content (%) Fibers/mg Charge (mmol/g) N neutral R3 6 neutral Turbidity (min-max): transparent 0 opaque 1000.