高淀粉含量玉米淀粉膜的制备及结构性能研究  

Preparation of corn starch film with high solid content of starch and its structure and properties

作　　者：李凤红[1] 吴全才[1] 赵文凯[1] 杨旭鹏[1] 汪志香 

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003 [2]中国石油辽阳石化分公司技术规划处,辽宁辽阳111003

出　　处：《现代化工》2009年第12期43-45,47,共4页Modern Chemical Industry

摘　　要：为改善原淀粉膜的脆性和成膜性,以甘油为增塑剂、采用高速搅拌及流延法制备了高淀粉含量的玉米淀粉膜。研究了甘油增塑前后玉米淀粉膜的热性能、显微观察及结晶结构,以及甘油的添加量对淀粉糊的流变性及淀粉膜的机械性能影响。结果表明甘油塑化玉米淀粉膜的α型结晶结构被破坏,并随甘油量的增加玉米淀粉膜的结晶度下降;甘油塑化的淀粉糊为假塑性流体,其黏度随剪切速率的增加而降低。当淀粉/水质量比为0.06时,甘油加入量为淀粉质量的40%时,甘油塑化淀粉膜的综合力学性能较好。High solid content of starch films are prepared with glycerol as plasticizer by high speed stirring and casting method to improve the film-forming capacity and britthty. The thermal properties, crystal structure of corn starch film before and after plasticized with glycerolare are characterized, and the different effects of weight ratio of glycerol on the rhelogical property of starch aqueous solution and mechanical properties of starch film are studied. The results indicate that the α-crystalline structure of glycerol-plasticized starch film is disrupted, and the crystallinity decreases with increasing the weight ratio of glycerol.The glycerol-plasticized starch aqueous solution is a kind of pseudoplastic fluid. The viscosity decreases with the increase of the shear ratio. The overall performance of glycerol-plasticized starch film is optimal when the starch/water mass ratio is 0.06 and the weight ratio of glycerol is 40% of the mass of starch.

关 键 词：玉米淀粉膜 甘油 高淀粉含量 结构 性能 

分 类 号：O636.1[理学—高分子化学]