Cellulose xanthate nanofiber
AssigneeRengo Co., Ltd.
InventorsJunichi Kubo, Tomoyuki Nakatsubo, Kenichi Ito, Hirokuni Tajima
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Abstract
Nanofiber that keep crystallinity are obtained from a cellulose material under light load. The nanofiber are obtained by treating a material containing cellulose with 4% by mass or more and 9% by mass or less of an aqueous alkali metal hydroxide solution to produce alkali cellulose, reacting the alkali cellulose with carbon disulfide to give cellulose xanthate, and defibrating the cellulose xanthate. Then, the xanthate is treated with acid or heat to be regenerated into cellulose nanofiber.
Claims10
A method for producing a cellulose xanthate nanofiber, the method comprising defibrating cellulose xanthate that contains cellulose I or a cationic substitution substance of the cellulose xanthate.
A cellulose xanthate nanofiber that contains cellulose I, wherein any hydroxyl group in cellulose is substituted with a xanthate group represented by a formula (1) below:
- —CSS−Mn+ (1)
- where a cation Mn+ is at least one selected from a hydrogen ion, a monovalent or polyvalent metal ion, an ammonium ion, and an aliphatic or aromatic ammonium ion, and n=1, 2, or 3.
Dependencies are inferred from the claim text.