模糊综合评判用于大豆分离蛋白膜制备工艺的优化  

Optimization of preparation of soybean protein isolate film by fuzzy synthetic discrimination

作　　者：邢方如 李颖[1] 张世锋[1] 李黎[1] 李建章[1] 

机构地区：[1]北京林业大学材料科学与技术学院,北京100083

出　　处：《中国油脂》2016年第5期19-23,共5页China Oils and Fats

基　　金：国家林业公益性行业科研重大专项(201504502)

摘　　要：为分析大豆分离蛋白(SPI)膜机械性能的影响因素及最优参数的选择,以SPI溶液质量分数、甘油添加量(占SPI质量)、成膜温度和膜液pH为实验因素,进行了单因素实验和正交实验。采用方差分析和直观分析初步确定了影响膜机械性能的主要因素及工艺参数;采用模糊综合评判方法对抗拉强度(TS)和断裂伸长率(EAB)进行综合评判,进而优化各影响因素。结果表明:甘油添加量对膜的机械性能影响最大;在TS和EAB这两个评判指标的权重向量为0.5∶0.5时,最优工艺参数为SPI溶液质量分数4%、甘油添加量20%、成膜温度65℃、膜液pH 10,此时大豆分离蛋白膜的TS和EAB可达5.41 MPa和186.36%。模糊综合评判在优化大豆分离蛋白膜制备工艺方面能起到一定的指导作用。In order to analyze influentia factors of mechanical property of soybean protein isolate （SPI） film and select the optimal process parameters, single factor experiment and orthogonal experiment were conducted with mass concentration of SPI solution, dosage of glycerol （ based on the mass of SPI） , film forming temperature and liquid film pH as experimental factors. The main factor and process parameters affecting mechanical property were preliminarily determined by variance analysis and visual analysis, and the tensile strength （TS） and elongation at break （EAB） were comprehensively evaluated by fuzzy syn- thetic discrimination to optimize each influentia factor. The results showed that dosage of glycerol had the greatest effect on mechanical property of SPI film. When the weight vector of TS to EAB was 0.5： 0.5, the optimal process parameters were obtained as follows： mass concentration of SPI solution 4%, dosage of glycerol 20%, film forming temperature 65℃ and liquid film pH 10. Under these conditions, TS and EAB of SPI film reached 5.41 MPa and 186.36%, respectively. The fuzzy synthetic discrimination could play a guiding role in the optimization of preparation of SPI film.

关 键 词：大豆分离蛋白膜 模糊综合评判 抗拉强度 断裂伸长率 

分 类 号：TS201.21[轻工技术与工程—食品科学]