大豆蛋白/聚乙烯醇复合薄膜的降解性能研究  

Study on Degradation of Soybean Protein/PVA Composite Films

作　　者：滑艳稳[1] 张晓霞[1] 申亚倩 

机构地区：[1]河北农业大学食品科技学院,河北保定071000

出　　处：《湖南工业大学学报》2013年第6期1-5,共5页Journal of Hunan University of Technology

基　　金：河北省科技计划基金资助项目(10225151)

摘　　要：分别阐述了大豆蛋白和聚乙烯醇的降解机理,并以失重率为降解性能评价指标,研究了大豆蛋白/聚乙烯醇复合薄膜和谷氨酰胺转氨酶改性大豆蛋白/聚乙烯醇复合薄膜分别在室外自然条件下和室内恒温恒湿条件下的降解性能。结果表明:TG对大豆蛋白/聚乙烯醇复合薄膜的降解性能影响不大,当降解时间达第9 d时,两种薄膜无论是在室内恒温恒湿条件下还是在室外自然条件下,失重率均在60%以上;降解时间达第161 d时,在室内恒温恒湿条件下的大豆蛋白/聚乙烯醇复合薄膜和TG改性大豆蛋白/聚乙烯醇复合薄膜的失重率分别为64.0%和64.1%,在室外自然条件下的分别为66.0%和67.0%;TG不仅能提高大豆蛋白/聚乙烯醇复合薄膜的机械性能,而且没有影响其降解性能。Soy protein and polyvinyl alcohol degradation mechanisms were described separately. With weight loss rate as the evaluation index of degraded performance, studied the degradation of soybean protein / PVA composite film and transglutaminase modified soybean protein / polyvinyl alcohol composite film under outdoor natural condition and indoor constant temperature and humidity condition. Experimental results show that： TG has little effect on the degradation of soybean protein / polyvinyl alcohol composite film. When the degradation time arrived the 9th day, the weight loss rates for two kinds of films are both above 60% either at indoor constant temperature and humidity condition or at outdoor natural condition. When the degradation time reached the 161st day, the weight loss rates of soybean protein / polyvinyl alcohol composite film and TG modified soybean protein / polyvinyl alcohol composite film at indoor constant temperature and humidity condition reached 64.0% and 64.1% respectively and at outdoor natural condition they were 66.0% and 67.0%. TG can improve the mechanical properties of soy protein / polyvinyl alcohol composite film and does not affect the degradation performance.

关 键 词：生物降解 大豆蛋白 聚乙烯醇 谷氨酰胺转氨酶 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]