Síntese de quitosana ftalato e sua caracterização

Abstract

Chitin and chitosan are examples of natural polymers and recent exploration. Chitin forms the basis of the exoskeleton of crustaceans aquatics and insects, besides occurring in the cell walls of fungi and yeasts. While chitosan is derived by its deacetylation, which gives low cost and its use contributes to the economic and environmental scenarios. Due to the presence of amino groups by structural modification is possible to obtain derivatives of chitosan, such as chitosan phthalate, which is an ester of chitosan, and gives it different characteristics, for example, acid resistance and permeability means aqueous. With this, you can use it as a coating film, aiming protection of adduced product. The aim of this study was to synthesize chitosan phthalate and perform their characterization. The procedure consisted of the synthesis from the esterification reaction of chitosan. The final product was treated in an oven with air circulation and then readings are carried out by infrared spectroscopy (IR), yield strength dependent on pH and degree of substitution for the characterization of the synthesized. The product was resistant to acid pH of 1.2 and 4.00, as well as yield (98%) and degree of substitution (9%) were considered satisfactory when compared to other studies.