METHOD OF PREPARING CELLULOSE NANO-FIBRES FROM STALKS OF ANNUAL PLANTS

摘要

The method of manufacturing cellulose nano-fibres from stalks of annual crops consist in that pieces of the stalks of annual plants are in sequence subjected to the action of steam, mechanical defibrillation, digestion in a digesting liquor, oxygen delignification in aqueous medium containing NaOH and MgSO4, bleaching with sodium chlorite done at least twice, alkaline extraction in an NaOH solution, enzymatic treatment of the prepared cellulose pulp by cellulase with 10-1000 J/g activity of endo-l,4-beta- glucanase 10-1000 J/g. After washing and enzyme deactivation, the aqueous suspension of the cellulose is put to homogenization and centrifugation to obtain a supernatant which contains cellulose nano-fibers.