摘要
以玉米淀粉为原料,硬脂酸为酯化剂,先用乙醇对淀粉进行非晶化处理,然后进行酯化反应制备硬脂酸玉米淀粉酯.考察淀粉中葡萄糖单元羟基(OH)与硬脂酸羧基(COOH)的摩尔比、反应温度、反应时间对硬脂酸淀粉酯取代度(DS)的影响,确定较适宜的反应条件:n(OH)∶n(COOH)=2∶1,反应温度为150℃,反应时间7 h,得到产品的DS为0.016 7.并对其黏度、凝沉性及透明度进行研究,结果表明:与原淀粉相比,硬脂酸淀粉酯的黏度减小,透明度和凝沉性增大.
Stearate starch was prepared by the corn starch with non-crystallized granule state reacted with stearic acid. The influence facters, such as the molar ratio of hydroxy in glucose unit of starch and carboxyl in stearic acid, reaction temperature and reaction time were investigated. The optimum reaction conditions were obtained： n （OH） ： n （COOH） = 2： 1, reaction temperature 150 ℃, reaction time 7 h, and the degree of substitution 0. 0167. Compared with the native starch, the viscosity of the stearate starch de- creased, while its transparency and retrogradation increased.
出处
《沈阳化工大学学报》
CAS
2012年第2期110-114,共5页
Journal of Shenyang University of Chemical Technology
关键词
非晶化淀粉
硬脂酸
淀粉酯
non-crystal starch
stearic acid
starch ester
