海带低极性成分的微胶囊化技术研究

Microencapsulation technology of low polar constituents from Saccharina japonica Aresch

海带低极性成分富含多酚与多不饱和脂肪酸,营养价值高,但稳定性却较低。以低温-微波技术等温和的条件提取、分离以上有效成分,着重研究保护其中光敏、热敏成分的微胶囊化技术。针对海带低极性有效成分进行乳化包裹及喷雾干燥,分别采用单因素法及L9(34)正交试验研究以上工艺对微胶囊化效果的影响,并以包埋率、提取率及含水量等指标评价工艺。由此获得最佳乳化工艺参数:芯材用量为13.2%,β-环糊精用量为19.9%,干酪素用量为0.7%,乳化剂用量为2.6%;在此基础上获得最佳喷雾干燥工艺参数:进风温度170℃,进料量13.95mL/min,进风速度4.2 m3/min,预热温度60℃;所获海带低极性成分的微胶囊粉末的提取率为74.88%,包埋率为95.23%,含水率为3.35%。该技术的工艺过程简单、稳定,且易于工业化。

A method was proposed for designing and optimizing composite shaft and a mathematical modal was established based on it. In the model, the quantity was set as objective, and the strength, critical speed and the outer diameter dimensions were set as restraint conditions. The design parameters consist of the thickness of the core, number of composite layers, thickness of single layer and the fiber＇s direction of each layer. A design and optimization platform was also established by ANSYS for optimizing both the discrete variables and the continuous variables. A low pressure turbine shaft was taken as a design example using metal matrix composite. It can save 36.16% mass compared with the metal one.