Method for producing cellulose nanofibers

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United States of America Patent

PATENT NO 9139662
APP PUB NO 20140053828A1
SERIAL NO

14008682

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Abstract

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Cellulose nanofibers are produced by means of a method comprising a step (A) of oxidizing a cellulosic starting material in the presence of an N-oxyl compound and a step (B) of forming the oxidized cellulosic starting material into nanofibers by defibrating the oxidized cellulosic starting material, and a step (C) of performing at least one selected from the following steps: a step (C-1) of treating the cellulosic starting material in water having a hydroxide ion concentration of 0.75 to 3.75 mol/L prior to performing the step (A); and a step (C-2) of subjecting the oxidized cellulosic starting material obtained from the step (A) to hydrolysis in an alkaline solution having a pH between 8 and 14 after performing the step (A) and prior to performing the step (B).

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Patent Owner(s)

  • NIPPON PAPER INDUSTRIES CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukazawa, Masahiko Tokyo, JP 5 95
Koyanagi, Tomoaki Tokyo, JP 2 3
Miyawaki, Shoichi Tokyo, JP 14 183
Tsuji, Shiho Tokyo, JP 5 43

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