淀粉-玉米醇溶蛋白可食性膜的筛选与性能研究

以玉米淀粉和玉米醇溶蛋白作为基础原料,研究可食性膜的成膜条件和膜性能。玉米淀粉液经糊化、掺入脱色的玉米醇溶蛋白、添加甘油增塑剂、匀浆、脱泡、成膜后,检测膜的抗拉强度、断裂伸展率、溶解度、透明度、微观表面特征。配制质量分数为4%、5%、6%、7%的玉米淀粉液分别制膜,检测并筛选一适宜浓度,同时筛选制备脱色玉米醇溶蛋白液。玉米淀粉糊化后,分别按其体积的0%、10%、15%、20%、25%、30%掺入脱色玉米醇溶蛋白液,制膜,筛选适宜掺入比例。测试筛选添加质量分数为1.0%、1.2%、1.4%、1.6%的甘油增塑剂的成膜效果。结果显示,添加玉米醇溶蛋白液能够提高抗拉强度和断裂伸展率,降低透明度和溶解度,但添加10%有反抗拉强度现象。筛选确定淀粉质量分数5%,按体积分数15%掺入含玉米醇溶蛋白0.5%的脱色液,添加1.2%的甘油增塑剂,获得的可食性淀粉-玉米醇溶蛋白膜具有良好的机械性能和表观特征。

Synthesis and Properties of Edible Corn Starch and Zein Complex Membrane

To study the properties and producibility of starch and zein membrane,corn starch was processed through cataplasm,zein adulterating,glycerol adding,homogenizing,de foaming and membrane forming,then examine that membrane’s tensile strength,elongation at break,solubility,transparency and micro surface properties.First,starch solutions of concentration of 4 %,5 %,6 % and 7 % were processed to membranes and tested that properties,at the same time,zein solutions were decolorized.Second,after corn starch cataplasm,zein