| abstract |
(57) [Problem] To provide a cellulose derivative imparted with high hydrophilicity or water solubility from water-insoluble cellulose under mild conditions. SOLUTION: An alkali-treated cellulose or regenerated cellulose is converted to an N-oxyl compound (2,2,6,6- Tetramethyl-1-piperidine N-oxyl, etc.) And a bromide (such as sodium bromide) or iodide to obtain a water-soluble cellulose derivative composed of a glucuronic acid residue in which a primary hydroxyl group of a glucose residue has been oxidized using an oxidizing agent. The alkali-treated cellulose is 1 It can be obtained by treating cellulose with an aqueous solution of 0 to 30% by weight of sodium hydroxide. |