食品科学 ›› 2008, Vol. 29 ›› Issue (10): 51-54.

• 基础研究 • 上一篇    下一篇

大豆分离蛋白膜的水分吸附特性

 姜燕, 唐传核, 温其标   

  1. 广东工业大学轻工化工学院; 华南理工大学轻工与食品学院;
  • 出版日期:2008-10-15 发布日期:2011-12-08

Water Adsorption Characteristics of Soy Protein Isolate Film

 JIANG  Yan, TANG  Chuan-He, WEN  Qi-Biao   

  1. 1.College of Light and Chemical Industry,Guangdong University of Technology,Guangzhou 510006,China; 2.College of Light Industry and Food Sciences,South China University of Technology,Guangzhou 510640,China
  • Online:2008-10-15 Published:2011-12-08

摘要: 本实验以大豆蛋白(SPI)膜为对象,从吸附动力学和水分吸附等温线研究了蛋白膜的水分吸附特性。SPI膜水分达到平衡所需要的时间受到所处相对湿度(RH)条件和增塑剂含量的影响。相对湿度和增塑剂含量越低,达到平衡的时间越短;反之,则越长。TGase改性明显降低了蛋白膜的水分吸附速率及达到平衡的水分含量。SPI膜水分吸附等温线数据能很好地与GAB模型吻合。

关键词: 水分吸附特性, 蛋白膜, 大豆分离蛋白

Abstract: Water adsorption characteristics,including adsorption kinetics and isothermal water adsorption curve of soy protein isolate (SPI) film were studied in this experiment. The results showed that relative humidity (RH) and plasticizer content significantly affect the time when moisture of SPI film reaches balance. The lower RH and plasticizer content,the shorter the moisture balance time,per contra,the longer. TGase treatment significantly decreases moisture adsorption rate and balance moistures content of SPI film. The isothermal water adsorption data are mathematically fitted to GAB model.

Key words: water adsorption characteristic, protein film, soy protein isolate