Effect of ultrasonic modification on edible chitosan-soy protein isolated membrane

Based on the film- formed process, ultrasonic modification was used to optimize the process.Response surface methodology was used to study the impact of ultrasonic power, ultrasonic time, and ultrasonic temperature on ultrasound modification.Composite score of the film was used as indicator, the optimum parameters that affect the final sonication factors were determined: ultrasonic power was 29 W, ultrasonic time was 24 min, ultrasonic temperature was 59℃.Under this condition, the maximum film composite score was 0.90, which was closed to the theoretical prediction 0.91. At the same time, the tensile strength of the composite film ( TS) was 3652 N /m2, elongation at break was 28.73%.Compared with the unmodified film, the overall performance of the composite film after ultrasonic treatment was greatly improved.