Cellulose nanofiber concentrated, dried product manufacturing method and cellulose nanofiber redispersion liquid manufacturing method

摘要

To provide a method of generating a CNF redispersion having the viscosity characteristics the same as that of an initial CNF dispersion by concentrating and drying without adding a chemical or the like in the CNF dispersion.SOLUTION: A production method of concentrated and dried product of cellulose nanofiber of the present invention uses a cellulose nanofiber dispersion A1 having a predetermined concentration suitable for the use of the cellulose nanofiber as a raw material, toward the cellulose nanofiber dispersion A1 set or conveyed into a drying chamber body 5 that can be depressurized, a microwave is radiated to perform a concentration and drying step P1 of drying at a low temperature under reduced pressure to produce a cellulose nanofiber concentrated and dried product A2.SELECTED DRAWING: Figure 3