摘要
采用单因素试验和响应面法优化复合增塑剂,研究其对玉米蛋白膜拉伸强度的影响,并对蛋白膜扫描电子显微镜图像进行分析。结果表明:复合增塑剂最佳组合为山梨醇0.19g/g pro、半乳糖0.17g/g pro、油酸0.32g/g pro,此复合增塑剂对玉米蛋白膜的拉伸强度有显著增强作用,由此制得玉米蛋白膜的拉伸强度为16.95MPa,断裂伸长率为2.68%;拉伸强度是单一玉米醇溶蛋白膜的2.96倍,是对照样(油酸、甘油型增塑剂)的1.16倍;断裂伸长率是单一玉米醇溶蛋白膜的1.64倍,是对照样的1.15倍;由扫描电子显微镜图可知该玉米蛋白膜表面结构光滑。
A plasticizer formulation for use in zein films was designed and optimized by one-factor-at-a-time experiments and response surface methodology.The effects of composite plasticizer on tensile strength of zein film were also investigated.Surface properties of zein films were analyzed by scanning electron microscope（SEM）.The results showed that the optimal plasticizer formula was sorbitol 0.19 g/g protein,galactose 0.17 g/g protein and oleic acid 0.32 g/g protein.Under the optimized conditions,the tensile strength and elongation at break of zein films was 16.95 MPa and 2.68%,which were 2.96 and 1.16 times,1.64 and 1.15 times higher than that of blank samples without plasticizer and control samples with glycerol and oleic acid as a plasticizer,respectively.SEM observations revealed that the zein films with the composite plasticizer had smooth surface.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2013年第10期21-26,共6页
Food Science
基金
国家"863"计划项目(2011AA100805)
吉林省科技发展计划项目(20115016)
关键词
玉米蛋白膜
复合增塑剂
优化
扫描电镜图
zein films
composite plasticizer
optimization
SEM photographs
