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Papir- og fiberinstituttet ASPaper and Fibre Research Institute
NORCEL: The Norwegian Nanocellulose Technology Platform.
Pho
tos: P
er Ola
v Jonhse
n, P
FI.
Kristin Syverud Lead scientist – Nanocellulose and Carbohydrate Polymers, PFIProf. II, NTNU
Papir- og fiberinstituttet ASPaper and Fibre Research Institute
NORCEL - The Norwegian Nanocellulose Technology PlatformOne 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 ([email protected]), 8th NTNU NanoLab Symposium, November 12th 2013
Papir- og fiberinstituttet ASPaper and Fibre Research Institute
Composite hydrogels with cellulose nanofibrils
Ellinor B. Heggseta, Olav Aarstadb, Ina S. Pedersenb, Berit L. Strandb and Kristin Syveruda
Collaboration between PFIa and the Department of Biotechnology, NTNUb
Structure-function relationship in cellulose nanofibril – alginate composite hydrogels
Papir- og fiberinstituttet ASPaper 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
OHHOOC O
GulA
OH
OH
HO
HOOCOHO
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 ASPaper 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.
Papir- og fiberinstituttet ASPaper and Fibre Research Institute
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