Papir- og fiberinstituttet AS Paper and Fibre Research Institute NORCEL: The Norwegian Nanocellulose Technology Platform. Photos: Per Olav Jonhsen, PFI. Kristin Syverud Lead scientist – Nanocellulose and Carbohydrate Polymers, PFI Prof. II, NTNU

Papir- og fiberinstituttet AS Paper and Fibre Research Institute NORCEL - The Norwegian Nanocellulose Technology Platform One of five main research projects in NANO2021. Managed by Paper and Fibre Research Institute (PFI). Three application areas: Paper and packacing. Petroleum industry (enhanced oil recovery, EOR) Tissue engineering Sigurd Rolland Pettersen 8th NTNU NanoLab Symposium, November 12th 2013

Papir- og fiberinstituttet AS Paper and Fibre Research Institute Composite hydrogels with cellulose nanofibrils Ellinor B. Heggset a, Olav Aarstad b, Ina S. Pedersen b, Berit L. Strand b and Kristin Syverud a  Collaboration between PFI a and the Department of Biotechnology, NTNU b  Structure-function relationship in cellulose nanofibril – alginate composite hydrogels

Papir- og fiberinstituttet AS Paper and Fibre Research Institute Alginate Alginates are a family of linear binary copolymers consisting of 1  4 -  -L- guluronic acid (G) and 1  4 -  -D-mannuronic acid (M) OH HO OH OH HOOC O GulA OH OH HO HOOC O HO ManA Structural component in marine brown algae. Gives strength and flexibility. Capsular component in some bacteria e.g. Azotobacter vinelandii and several species of Pseudomonas

Papir- og fiberinstituttet AS Paper and Fibre Research Institute Results Figure 2. Young’s modulus (E) measured for the alginate gels with different amount of fibrils (both mechanical and oxidized quality) added. M. pyrifera alginate + 30 % mech. NFC M. pyrifera alginate + 30 % TEMPO-ox. NFC M. pyrifera alginate Figure 1. Composite hydrogels with alginate from M. pyrifera and 30 % CNF (mechanical or oxidized quality). The gel to the right is a control with alginate only.

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