油菜籽蛋白质琼脂复合膜的性能研究  

Performance Studies on Rapeseed Proteins-Agar Blend Films

作　　者：张文宇[1] 成兰英[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《精细化工》2014年第9期1096-1100,1105,共6页Fine Chemicals

基　　金：四川省教育厅重点项目(07Zd1117);博士研究基金(07ZX0108);横向技术开发项目(12zh0051)~~

摘　　要：以油菜籽蛋白质和琼脂粉为原料,采用浇铸法制备共混膜,考察了琼脂用量、热处理、pH以及甘油用量对薄膜机械性能与光学性能的影响。结果表明,对薄膜物理性能影响较显著的因素为琼脂用量、pH和甘油用量,热处理影响不明显。成膜的最佳条件为琼脂用量70%,蛋白质含量为30%,pH=10.0,甘油添加量0.8 g,热处理温度50℃,在该条件下制备的复合膜的抗拉强度和断裂伸长率分别达到35 MPa和10%,较单一的蛋白质薄膜提高了6～10倍;透明度由2.88提高到0.93。Blend films were prepared by casting method with agar and rapeseed proteins as raw materials, and the influence of agar content, ultraviolet radiation, heat treatment, pH and glycerol content on the mechanical and optical properties of the films were investigated. The results show that agar content, pH and glycerol content have significant influence than heat treatment. The best film forming conditions are at agar content 70%, rapeseed protein content 30% , pH = 10. 0, glycerol content 0. 8 g, and heat treatment at 50 ℃ ;the tensile strength and elongation at break at this point are 35 MPa and 10% respectively, improved by 6 -10 times compared with the pure proteins films; the opacity improved from 2. 88 to 0. 93.

关 键 词：油菜籽蛋白质 琼脂 复合膜 物理性能 食品与饲料用化学品 

分 类 号：TQ321.4[化学工程—合成树脂塑料工业]