Abstract:Chitosan was prepared from the shell of Penaeus vannamei, and the preparation process was optimized. It illustrated that optimum conditions of prepared of chitosan were temperature 90 ℃, time 150 min and alkali concentration 60%. Under these conditions, the deacetylation degree of chitosan was 87.04%.The product structure was characterized by the ultraviolet-obvious spectrophotometer, the TG/DTA analyzer and the scanning electron microscope. The surface of chitosan was dry and thickening. The degree of crystallinity was good and the thermal stability was high. It provided theoretical basis for the effective use of penaeus vannamei shell.
