Preparation process of corn starches /Sodium alginate blend edible films

Abstract

Corn starch is used as the main ingredient of film, glycerol as plasticizer and sodium alginate as the reinforcer. The mechanical properties of edible films and barrier properties were studied to determine the parameters and the optimum proportion of each component. The results are as follows: cast film forming method, select the water bath temperature is 75°C, stirring speed 400r/min, bath time is 30min, the drying temperature is 50°C, drying time is 8h, select the 12-layer gauze filters, film firming on the glass. If tensile strength and barrier properties were used as the first indicator, the best formula should be: the total concentration of casting solution is 7%, glycerol concentration is 1%, starch and sodium alginate ratio is 1:1. Considering all of the factors, the total concentration of casting solution is 7.5%, glycerol concentration is 1%, starch and sodium alginate ratio is 3:2.