Propertion of cross-linked soy protein isolate and wheat gluten protein based films

The factors influencing the film-forming of soy protein isolate and wheat gluten protein were discussed and the effects of these factors on the properties of composite films were analyzed.The results of orthogonal test were evaluated by range analysis and synthesis scoring method.The optimum film-forming condition of composite film was:proportion of WG and SPI for 1:5,concentration of glycerin for 20%,pH 11,preheating temperature and time for 80 ℃ and 40 min.And film obtained from this condition has transparence,tensile strength,tear strength,moisture content,and water vapor permeability of 60.5 %,38.38 MPa,198.02 N/mm,13.87%,0.507 g·mm/kPa·h· m2,respectively.