Effect of properties of proteins and transglutaminase on wheat gluten films formation

The film forming properties of wheat gluten effected by the properties of proteins, transglutaminase (MTG) and preparation conditions were investigated.The results showed that when dosage of MTG was 20U/g, reaction time was 120min, pH value of film solution was 11, ratio of glycerol and wheat gluten was 1:2.5, the plastic plate was choosed as films formation medium and concentration of ethanol was 40%～50%, tensile strength, water resistance and light transmission increased by 51%, 23% and 5.48 times, respectively.The SEM picture showed that the film surface was more delicate and smooth.The results suggested that the effect of properties of proteins was critical, enzyme treatment improved the mechanical properties and translucency of films and reasonable conditions endow wheat gluten films with good performance.