METHODS OF PREPARATION OF NANOFIBRILLATED CELLULOSE FOR SPECIAL FILTER PAPERS WITH EFFECTIVE AIR FILTRATION. SHORT NOTES

Abstract

Nanofibrillated cellulose was prepared from distillery refuse based on maize starch using the extraction with NaOH and HCl involving centrifugation. SEM images of bleached kraft pulp with/without the addition of nanofibrillated cellulose were compared. Theresults showed that the application of nanofibrillated cellulose caused a visible reduction in the surface porosity. Conversely, mixing of the pulp with the nanofibrillated cellulose resulted in large pores among the fibres. The effect of the cationic retention aid on porosity was not significant, observed in the fines retention. A minimal difference in porosity was found among of fine and coarse fibres.When lyophilisationas drying method was used it yielded nanofibrillated cellulose with a size in the range of approximately 100 to 150 nm.