Comparison of gelatinization method, starch concentration, and plasticizer on physical properties of high-amylose starch films

摘要

High amylose starch is a potential material to produce biodegradable films with the better physical properties than normal starch. In this research, Taguchi's design and analysis of variance were used to compare the effects of gelatinization methods, starch concentrations, and plasticizers on physical properties of high amylose starch films. The results showed that the gelatinization method was the most significant factor for transparency, and the highest transparency was obtained through high temperature-high pressure treatment. The starch concentration impacted farthest on thickness, tensile strength, elongation at break, and solubility in oil. The highest thickness and tensile strength were obtained from 10% starch concentration, the highest elongation at break were created by 5% concentration, and the lowest solubility in oil was produced by 2% concentration. Solubility in water was affected by plasticizers most, especially in xylitol. The information in this study is helpful to choose optimal parameters for preparing high amylose starch films with desired physical properties.