METHOD FOR PRODUCING CELLULOSE NANOFIBERS

摘要

Cellulose nanofibers are produced by means of a method involving a step (A) in which a cellulose-based starting material derived from hardwood having a hemicellulose content of 17 mass% or more is oxidized using an oxidizing agent (a3) in the presence of an N-oxyl compound (a1) and a compound (a2) selected from among bromide, iodide and a mixture thereof, and a step (B) in which a dispersion liquid in which the concentration of the oxidized cellulose-based starting material obtained from step (A) is 0.3% (w/v) or more is prepared and the oxidized cellulose-based starting material is formed into nanofibers by fibrillating the oxidized cellulose-based starting material while dispersing same in a dispersion medium.