卡拉胶植物淀粉复合膜制备及其相关性能研究  

Preparation and characteristics of modified starch- carrageenan complex film

作　　者：李荣荣[1] 王素珍[1] 岳雪[1] 董惠钧[1] 

机构地区：[1]聊城大学药学院,山东聊城252000

出　　处：《食品工业科技》2016年第11期253-258,共6页Science and Technology of Food Industry

摘　　要：采用木薯醋酸酯淀粉、玉米淀粉和卡拉胶复配制备复合膜材料。在分别研究三种单一成分的浓度-粘度-温度关系、溶解度、膨胀率等性能基础上,选择了成膜性较好的三种配比5∶3∶2,2∶6∶2和1∶7∶2(醋酸酯淀粉:玉米淀粉:卡拉胶),进一步分析了三种膜的透光率、水蒸气透过率和吸湿率等性能。结果表明1号膜(5∶3∶2)醋酸酯淀粉含量高,膜的抗拉强度和断裂伸展率最大,分别为5.13 MPa和6.0%,当卡拉胶比例一定的条件下醋酸酯淀粉对膜的水蒸气透过性和吸湿性影响显著,而对透光率影响不大,醋酸酯淀粉含量高的1号膜的吸湿增重、水蒸气透过系数和透光率分别为40.16%,0.49 g·mm/m^2·h·k Pa和44.5%(450 nm),而3号膜则分别为21.39%,0.34 g·mm/m^2·h·k Pa和34.80%(450 nm)。综上,醋酸酯淀粉和卡拉胶是影响膜各项性能的关键成分。Acetylated cassava starch, corn starch and carrageenan were used to prepare complex film. Based on the characteristics including viscosity, solubility and inflation rate of cassava modified starch, corn starch and carrageenan,the three kinds of composite films with proportion of 5 ： 3 ： 2,2： 6： 2 and1 ： 7： 2 （ acetylated cassava starch：corn starch= carrageenan）were made and tested on the light transmittance of membrane,water vapor transmittance and moisture absorption rate.The results revealed that No.1 film containing high concentration of acetylated cassava starch had the maximum tensile strength and elongation which were 5.13 MPa and 6.0%, respectively.Acetylated cassava starch had a significant impact on water vapor transmittance and moisture absorption rate of membrane when the content of carrageenan was constant.The moisture absorption,water vapor transmittance and the light transmittance of membrane of No.1 film was 40.16% ,0.49 g. mm/m2, h, kPa and 44.5% （450 nm）, while the characteristics of No.3 film was 21.39% ,0.34 g. mm/m2 · h· kPa and 34.80% （450 nm）, respectively. Overall, acety）ated cassava starch and carrageenan were the key compositions for the film preparation.

关 键 词：醋酸酯淀粉 玉米淀粉 卡拉胶 复合膜 

分 类 号：TS236[轻工技术与工程—粮食、油脂及植物蛋白工程]