摘要
以酶解处理后的水溶性辛烯基琥珀酸糯玉米淀粉酯(简称OSS)为原料,三偏磷酸钠为改性剂,制备了改性OSS膜,以膜的抗拉强度为响应值,通过单因素和响应面实验优化了OSS膜的改性工艺,采用31PNMR和FTIR对最优条件下制备的膜进行了表征。结果表明,在反应时间5.8 h、pH 6.8、三偏磷酸钠用量为OSS质量的18%的最佳工艺条件下,改性OSS膜的抗拉强度为2.19 MPa,比OSS膜提高了69.77%。改性OSS膜断面均匀,起始相变温度提高14.6℃,归因于三偏磷酸钠和OSS间的氢键键合提高了OSS膜的性能。OSS乳化负载维生素E后再经三偏磷酸钠改性可有效提高乳化膜中维生素E的高温(60℃)贮藏稳定性。
Modified octenyl succinic anhydride waxy corn starch(OSS)film was prepared via sodium trimetaphosphate modification of enzyme-hydrolyzed OSS.The modification process was optimized by single-factor experiment and response surface methodology with tensile strength of film as response value,and the structure of the modified OSS film obtained under the optimal conditions was characterized by31PNMR and FTIR.The results showed that,under the optimal conditions of reaction time 5.8 h,pH 6.8,trisodium trimetaphosphate 18%of OSS mass,the tensile strength of the modified OSS film was 2.19 MPa,69.77%higher than that of the OSS film.Meanwhile,the modified OSS film displayed a more homogeneous cross section with onset phase transition temperature increased by 14.6℃,which could be attributed to the hydrogen bond formed between sodium trimetaphosphate and OSS.Moreover,it was found that trisodium trimetaphosphate modification of OSS loaded with vitamin E could effectively improve the film-forming property of the film and the storage stability of vitamin E in high temperature(60℃).
作者
张馨月
仇丹
王亚娟
沈可欣
肖志刚
邵平
ZHANG Xinyue;QIU Dan;WANG Yajuan;SHEN Kexin;XIAO Zhigang;SHAO Ping(College of Grain Science and Technology,Shenyang Normal University,Shenyang 110034,Liaoning,China;School of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo 315211,Zhejiang,China;College of Food Science and Technology,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2023年第3期656-664,共9页
Fine Chemicals
基金
宁波市自然科学基金(2021J142)。
关键词
辛烯基琥珀酸淀粉酯
三偏磷酸钠
改性
抗拉强度
响应面法
维生素E
淀粉化学品
octenyl succinic anhydride modified starch
trisodium trimetaphosphate
modification
tensile strength
response surface methodology
vitamin E
starch chemicals
