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BEZERRA, A. M. Quantitative and qualitative exploration of a new renewable source of chitosan. 2015. 105f. Tese (Doutorado) – Faculdade de Ciencias Farmaceuticas, Universidade de Sao Paulo, Sao Paulo, 2015. Chitosan is a functional biopolymer with great development potential, which can generate different types of materials with several purposes. Depending on changes in its structure, chitosan has found applications in several areas, having a wide range of applications. Despite the increasing use of chitosan and the increase in research for new applications, the exploration of other options as sources of chitosan (other than shellfish) have not been consistently shown. The goal of this project is to conduct a quantitative and qualitative exploration of a new renewable source of chitosan. Blattaria, commonly known as cockroaches, are an alternative source for the production of chitosan. They are terrestrial organisms that present a considerably fast reproduction, adapt to many different environments and have a very low cost of growing, due to its easy adaptation to the environment and food. Moreover, the cockroaches don t present seasonality and still perform ecdysis, where the exuvia can be used to produce chitosan. The process and the efficiency of the process of obtaining chitosan from the cockroaches, Phoetalia pallida, were determined: they were treated with a solution of sodium hydroxide 50% (w / v) at a temperature of 120 °C for seven different time periods (1, 2, 3, 6, 10 and 20 hours). Chitosans obtained therefrom were characterized by Infrared spectroscopy (FTIR), thermal behavior (TG / DTG and DSC), x-ray diffraction, viscosimetry and solubility test. Obtaining chitosan from cockroaches showed advantages over the production from shellfish: reduced number of process steps and not requiring treatment with HCl, which is a pollutant. The process of obtaining chitosan showed an efficiency of approximately 15%, depending upon the reaction time. In general, the cockroach chitosan showed characteristics similar to shrimp chitosan.

Prospecção quantitativa e qualitativa de uma nova fonte renovável de quitosana