Method for processing nanofibrillar cellulose and product obtained by the method

摘要

The invention relates to a method for processing an aqueous gel of nanofibrillar cellulose by removing water from the aqueous gel by means of an organic solvent miscible with water. In the method: aqueous gel is introduced into a volume of organic solvent miscible with water in a controlled manner so that the aqueous gel is kept as a separate phase and forms discrete physical entities containing the nanofibrillar cellulose within the phase; water is changed with the organic solvent in said discrete physical entities of nanofibrillar cellulose; and the physical entities are separated from the volume of organic solvent.

主权项

1. A method for processing an aqueous gel of nanofibrillar cellulose by removing water from the aqueous gel by means of an organic solvent miscible with water, the method comprising:
introducing the aqueous gel into a volume of organic solvent miscible with water; mechanically disintegrating the aqueous gel into discrete physical entities in the volume of organic solvent; disintegrating the aqueous gel mechanically into discrete physical entities being performed in a controlled manner so that the aqueous gel is kept as a separate phase so that phase boundaries remain between the organic solvent and the discrete physical entities of nanofibrillar cellulose, which form separate particles in the volume of organic solvent; changing the water with the organic solvent in the discrete physical entities of nanofibrillar cellulose, and separating the discrete physical entities from the organic solvent.