METHOD OF PRODUCING WATER DISPERSION OF NANOCRYSTALLINE CELLULOSE Russian patent published in 2017 - IPC C08B15/00 B82B3/00 

FIELD: chemistry.

SUBSTANCE: process performs the controlled destruction of cellulosic raw materials in a mixture of phosphotungstic acid, acetic acid and hydrogen peroxide, with phosphotungstic acid taken in the amount of 5÷8% of mole relative to the anhydroglucose unit of cellulose, hydrogen peroxide is added in an amount of no more than 0.5% of the volume of the mixture. The desired product is obtained as an aqueous dispersion of NFC with particle sizes of 100-300 nm and a diameter of 20-35 nm, with a crystallinity index above 0.9. Cellulose powder produced on the basis of plant material, including cellulose, isolated from coniferous or hardwood, as well as from flax and cotton, is used as the starting cellulosic raw material.

EFFECT: reducing the cost of obtaining the desired product in the form of an aqueous dispersion of NFC, reducing the duration of the regulated destruction of cellulose, obtaining the geometric dimensions of nanoparticles at least in one dimension less than 100 nm, providing a wide range of applications.

4 cl, 1 dwg, 9 ex