丝素-海藻酸钠-甘油共混膜的制备及性能研究

以丝素蛋白为原料,海藻酸钠和甘油作为添加剂,考察丝素蛋白溶液、海藻酸钠溶液的浓度和甘油的加入量对膜的厚度、断裂伸长率以及水蒸气迁移速率的影响,并通过正交试验来确定丝素-海藻酸钠-甘油共混膜的最佳配比.试验结果表明,最佳配方为丝素溶液浓度3%,海藻酸钠溶液浓度12.5 mg·mL-1,甘油加入量0.5 mL.在此条件下,膜的厚度、断裂伸长率及水蒸气迁移速率分别为0.075 mm、45.53%和13.76 g·m-2·h-1.

Preparation of silk fibroin-sodium alginate-glycerol blend films and its properties

In this experiment, the blend films were mainly prepared from silk fibroin, and the sodium alginate and glycerol were also added in as additive. Concentration of silk fibroin solution, concentration of sodium alginate solution and glycerin amount were studied which have some effects on the properties of the blend films, including thickness, elongation at break and vapor transfer velocity. The optimal formula for the silk fibroin - sodium alginate-glycerol blend films was determined by orthogonal experiment. The results showed that the best concentration of silk fibroin, concentration of sodium alginate and glycerol amount were 3%, 12.5 mg/ml and 0.5 ml, respectively. In this condition, the thickness, elongation at break and vapor transfer velocity of the blend films could reach 0.075 mm, 45.53% and 13.76 g·m^-2·h^-1, respectively.