南美白对虾壳聚糖制备工艺的优化及其表征

Optimization of the Preparation of Chitosan from Wastes of Penaeus vannamei

摘要:

利用南美白对虾壳制备壳聚糖，并对其制备工艺进行了优化。结果表明：制备壳聚糖的最佳条件为温度90 ℃、时间150 min、碱浓度60%，其脱乙酰度最高为87.04%，取得了较好的结果。通过紫外-可见分光光度计、热重/差热分析仪、扫描电镜对产物结构进行表征。壳聚糖表面干燥，致密，结晶度好，热稳定性高。本试验为有效利用南美白对虾壳制备壳聚糖提供了依据。

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.