Nanocellulose dewatering and modification

Invention: Novel method to dewater and chemically modify nanocellulose.
Application: Modified cellulose-based materials for several applications.
Unmet need: Low water contents with cost-efficient solution with subsequent chemical modification.
IP Status: Patent pending.
Project phase: Proven in laboratory scale, research on chemical modification.

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Currently dewatering of nanocellulose requires methods, such as freeze-drying or spray-drying, that are process-intensive. They require a lot of energy, which makes them costly solutions, or they do not achieve very low water contents, which complicates chemical modification. In addition, hazardous exchange solvents with reproductive toxicity are often applied. A major disadvantage of the current methods are that they do not provide low enough water contents for subsequent waterfree chemical modification of the nanocellulose.

Alistair King
Faculty of Science, University of Helsinki

EP16774973.8

Laaksonen, King et al. ChemSusChem, 2017