双醛淀粉酸解氧化制备工艺优化研究

Process Optimization of Dialdehyde Starch Prepared by Acid Hydrolysis and Oxidation

以玉米淀粉为原料,盐酸为酸解剂,高碘酸钠为氧化剂,通过酸解氧化法制备双醛淀粉。采用正交试验法研究了盐酸浓度、反应温度和反应时间对双醛淀粉醛基含量的影响,通过效应曲线分析、交互作用和显著性分析优化了酸解氧化工艺。结果表明:对双醛淀粉醛基含量的影响因素依次为反应温度、反应时间、盐酸浓度;双醛淀粉制备的最优工艺条件为盐酸浓度0.9 mol/L、反应温度55℃、反应时间2 h,在此工艺条件下得到双醛淀粉的醛基含量为69.56%。

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 influencing aldehyde content of dialdehyde starch was reaction temperature, reaction time, concentration of hydrochloric acid. The optimum condi-tion was that the concentration of hydrochloric acid was 0. 9 mol/L, the reaction temperature was 55 ℃ and the re- action time was 2 h. And aldehyde content of dialdehyde starch prepared for the optimum conditions was 69. 56%.