Dialdehyde starch was prepared by the method of acid hydrolysis and oxidation, in which corn starch as raw material, hydrochloric acid as acid agent and sodium periodate as oxidant. The effect of concentration of hydro- chloric acid, reaction temperature and reaction time on the aldehyde content of dialdehyde starch was considered by orthogonal experiment. The process of acid hydrolysis and oxidation was optimized with response curve analysis, inter- action analysis and significant analysis. The results showed that the order of factors influenc...