甘油对明胶-普鲁兰多糖复合材料性能的影响

摘要

研究甘油添加量对明胶-普鲁兰多糖复合材料抗拉强度、断裂延伸率、颜色、氧气透过率、水蒸气透过率、油脂透过率和溶水性的影响。结果显示添加甘油后，明胶-普鲁兰多糖复合材料的断裂延伸率显著提高，最高达到31倍；氧气阻隔能力提高，最高达到0.15 mL·m/（m2·d）；溶水时间降低，最低达到15 s；但是，其抗拉强度和水蒸气阻隔能力降低。%　　The effect of glycerol addition on tensile strengthen and elongation at break , color, water-vapor transmission ratio, oxygen permeability, lipid transmission ratio and water solubility of gelatin-pullulan composite film was evaluated. The results indicated that the glycerol additions improved the elongation at break of gelatin-pullulan composite films for 31 times. The tensile strength of composite film was also improved. The oxygen permeability , water vapor permeability , and water solubility of the composite film was decreased after the glycerol addition.