METHOD OF OBTAINING NANOCELLULOSE, INCLUDING MODIFICATION OF CELLULOSE FIBRES Russian patent published in 2014 - IPC D21H11/20 D21C9/00 B82Y99/00 A23L1/05 A61K8/73 A61Q1/00 C08B15/00 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to method of obtaining nanocellulose, which includes modification of cellulose fibres. method includes the following stages: i) processing cellulose fibres for, at least, five minutes with aqueous electrolyte-containing solution of amphoteric or anionic carboxymethylcellulose (CMC), where the temperature in the process of processing constitutes at least 50°C, and at least one of the following conditions is fulfilled: A) pH value of aqueous solution in the process of processing is in the interval about 1.5-4.5; or B) pH value of aqueous solution in the process of processing is higher than about 11; or C) concentration of electrolyte in aqueous solution is in the interval about 0.0001-0.5 M, if electrolyte has monovalent cations, or in the interval about 0.0001-0.1 M, if electrolyte has bivalent cations, ii) setting pH in the interval of pH values from about 5 to about 13 by application of basic and/or acidic liquid and iii) processing said material in mechanical crushing device and obtaining nanocellulose in such way. If amphoteric CMC is applied, at least 23.6 mg/g of CMC are added, and in case anionic CMC is applied, at least 61.6 mg/g of CMC are added.

EFFECT: application of method of nanocellulose production in accordance with claimed invention prevents clogging of mechanical devices.

13 cl, 7 dwg, 1 ex, 1 tbl