Chemical and Materials Engineering | Article | Published 2023
Chitosan occurs in different molecular weights and degrees of deacetylation. Molecular weight and degree of deacetylation are the main factors affecting particle size, particle formation and aggregation. The use of chitosan improved the dry strength of the paper, especially by adding 1% low molecular weight chitosan. But the increase in concentration reduced its dry strength. This can be explained as follows. The connection must correspond to the distance between the segments between the fibers, because they form an inter-fiber connection area. Even if the water molecule is separated from the organic bond with the fibers or not, a large amount of water destroys the bond state of the paper. These factors are important in the paper industry. Paper-like materials were obtained on the basis of cellulose obtained from the stem of the flax plant. The effect of fibers and adhesives in the composition on the quality indicators of the obtained paper was considered. The effects of chitosan and starch glue were compared. It can be explained that the hydrogen bond on the fiber surface is mainly monopolized by the water molecule, because the fiber forms a macroscopic liquid bridge. The weakness of this bridge indicates the wet tensile strength of the paper.