FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (10): 51-54.

Previous Articles     Next Articles

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

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