INFLUENCE OF CAPILLARY-POROUS STRUCTURE OF CELLULOSE ON PHYSICOCHEMICAL PROPERTIES OF FIBROUS MATERIAL

The aim of this work is to establish the influence of capillary-porous structure of cellulose on the physicochemical properties of fibrous material. Sulphate bleached hardwood pulp and algal cellulose obtained from the brown alga Saccharina latissima were used in this work. Algal cellulose has a mesoporous structure with a developed specific surface area. The size of algal cellulose fibres is 0.1-0.4 mm, and in terms of morphology they are ribbon-shaped, some of which are twisted. The study of physical and mechanical properties of composite paper made of hardwood pulp with algae pulp additive revealed differences with paper made of pure hardwood pulp. The addition of algae cellulose imparts roughness to the paper web, reduces air permeability and capillary absorption. The composite is also more effective as a filter than a paper web made solely of hardwood pulp. The obtained composite paper has prospects for the production of special purpose papers.