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Chitosan is the product of deacetylation of chitin. Generally speaking, when the acetyl group is removed by more than %, it can be called chitosan. In other words, it can be dissolved in % acetic acid or % hydrochloric acid.
Dissolve % of chitosan, this chitosan is called chitosan. In fact, chitin with a degree of deacetylation above % can be dissolved in this dilute acid. As an industrial product, chitosan has a degree of deacetylation above %. Chitosan with a deacetylation degree of %~% is low deacetylation degree, chitosan with medium deacetylation degree is %~%, chitosan with high deacetylation degree is %~%, and ultra-high degree chitosan is %~% Deacetylated chitosan. Chitosan with % deacetylation is extremely difficult to prepare. Chitin
There may or may not be an acetyl group on each sugar group of chitin. Anything with an acetyl degree below % is called chitin, because it is definitely insoluble in the above concentration. of dilute acid. The degree of deacetylation of chitosan is above %
During the manufacturing process, the relative molecular masses of chitin and chitosan are generally expressed by numerical values of viscosity. Commercial chitosan has three different viscosities depending on its use, namely high viscosity products, medium viscosity products, and low viscosity products. High viscosity chitin or chitosan must be used to manufacture fiber products.
Characteristics of Chitosan Chitosan is white to light yellow or light blue-white or light red-white amorphous powder or scale.
Overview of Chitosan Chitosan can be used as a plastic wrap for food. Applying its aqueous solution to the surface of fruits and vegetables can artificially form a closed environment with low oxygen and high carbon dioxide on the surface of fruits and vegetables, inhibiting the respiration of fruits and vegetables, inhibiting bacterial reproduction, improving the gloss of fruits and vegetables, and improving the sensory quality of fruit trees.