Effect of Drying Temperature on Performance of Soybean Protein-lsolate/Carboxymethyl Cellulose/Stearic Acid Composite Films

摘要

Drying is important for the matrix formation of composite films. A low drying temperature guarantees the compact matrix, while a higher temperature strengthens the crosslinking of ingredients. A balance point of the compact matrix and higher crosslinking degree was the key to enhance the performance of a composite film. The temperature of 30, 60, 90, and 120 °C was used to dry the soybean protein-isolate/carboxymethyl cellulose/stearic acid composite films. When being dried at 90 °C, the tensile strength of the composite films was 2.63 times higher than that of the control, and the water vapor permeability of the composite films was 77.6 % of that of the control. Hence the temperature of 90 °C was the balance point of the composite films.