以无水甲醇、无水乙醇、异丙醇及正丁醇作溶剂，用盐酸对蜡质玉米淀粉进行改性。研究了蜡质玉米淀粉在有机醇溶液中酸改性前后的物化性质。结果表明经酸处理的蜡质玉米淀粉随有机醇介质（从甲醇到正丁醇）碳原子数量的增加，颗粒表面逐步出现小孔直到产生裂纹，冻融稳定性依次减弱，溶解度逐渐增大，膨胀度逐渐降低；淀粉的晶型基本没有变化，但对应衍射峰强度减弱。以上结果表明酸在不同有机醇介质中对淀粉的作用程度不同，从甲醇到丁醇依次增强。

The physicochemical properties of waxy corn starch was studied before and after treated in anhydrous alcohols with acid. Waxy corn starch was treated in anhydrous methanol, ethanol, 2-propanol and 1-butanol with hydrochloric acid. The results showed that the surface was porous after starch acid-alcohol treated, and the fissure on the surface of granules could be observed with the increasing of carbon number of alcohol. Acid-alcohol treatment decreased syneresis and the swelling power and increased the solubility as the increasing of carbon number of alcohol from ethanol to 1-butanol. The X-diffraciton pattern did not changed, but the intensities of the major d-spacings decreased after acid-alcohol treatment. The foregoing data showed starch could be made more susceptible to acid hydrolysis in different alcohols from methanol to 1-butanol.

国家自然科学基金（21004023）；广东省产学研项目（2012B091100443，2012B091100047）