Abstract: Heat-moisture treatment for cornstarch was used in this experiment. Modified cornstarches were hydrolyzed by hydrochloric acid, then percentage of hydrolysis of modified cornstarches was measured in order to get the best modified cornstarch. With uniform design, the most important influence factors in this test were choose. Results were followed: the degree of humidity 14%, the temperature 120 ℃, and time 4 h. On these conditions, the maximum hydrolysis percentage for modified cornstarch is 14.39%.

Key words: cornstarch, heat-moisture treatment, hydrolysis rate, uniform design