Jiangsu Key Laboratory for Bioresources of Saline Soils, Yancheng Teachers University, Yancheng City, Jiangsu Province, 224051, People's Republic of China; Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing City, Jiangsu Province, 210009, People's Republic of China.
Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province, 224051, People's Republic of China.
Carbohydr Polym. 2019 Apr 1;209:266-275. doi: 10.1016/j.carbpol.2019.01.030. Epub 2019 Jan 11.
The present work aimed to compare the physicochemical, rheological, and morphologic properties of chitosan extracted from cicada slough, silkworm chrysalis, mealworm, grasshopper and shrimp shells. The physicochemical properties including solubility, fat binding capacity, water binding capacity, ash, viscosity average molecular weight and moisture content of them were determined. The characterization results showed that insect chitosan was quite different from shrimp shell chitosan including thermal stability, rheological characteristics and surface morphology. Crystallinity index values of chitosan from cicada slough, silkworm chrysalis, mealworm, grasshopper and shrimp shells were observed to be 64.8%, 32.9%, 51.9%, 50.1% and 49.1%, respectively. The crystallinity indices of shrimp shell, mealworm and grasshopper chitosan were very close to each other. Flow behavior revealed that chitosan from four insects exhibited the lower viscosity than shrimp shell chitosan. According to dynamic oscillatory analysis, insect chitosan revealed lower modulus values than shrimp shell chitosan. Each of them had a novel structure and different morphologic properties. These results will contribute to increasing potential application of insect chitosan in food and pharmaceutical industries.
本工作旨在比较蝉蜕、蚕蛹、黄粉虫、蝗虫和虾壳中提取的壳聚糖的物理化学、流变和形态特性。测定了它们的物理化学性质，包括溶解度、脂肪结合能力、水结合能力、灰分、粘均分子量和水分含量。表征结果表明，昆虫壳聚糖与虾壳壳聚糖在热稳定性、流变特性和表面形态等方面有很大的不同。蝉蜕、蚕蛹、黄粉虫、蝗虫和虾壳壳聚糖的结晶度指数分别为 64.8%、32.9%、51.9%、50.1%和 49.1%。虾壳、黄粉虫和蝗虫壳聚糖的结晶度指数非常接近。流动行为表明，四种昆虫的壳聚糖的粘度均低于虾壳壳聚糖。根据动态振荡分析，昆虫壳聚糖的模量值低于虾壳壳聚糖。它们各自具有新颖的结构和不同的形态特性。这些结果将有助于增加昆虫壳聚糖在食品和制药工业中的潜在应用。
