| abstract |
The present invention provides a technique for effectively producing finely modified cellulose fibers obtained by treatment with an organic onium compound. A reactive fiber obtained by allowing an N-oxyl compound and a co-oxidant to act on natural cellulose is wet-dispersed in the presence of an organic onium compound having a cationic structure represented by the following formula (1). A method for producing a finely modified cellulose fiber, characterized in that: [Chemical 1] (In the formula, M represents a nitrogen atom or a phosphorus atom, and R 1 , R 2 , R 3 and R 4 each independently represents a hydrocarbon group or a hydrocarbon group containing a hetero atom. R 1 , R 2 , R The total number of carbon atoms of 3 and R 4 is 4 to 120. R 1 , R 2 , R 3 and R 4 may be bonded to each other to form a ring. [Selection figure] None |