高粘度羧甲基淀粉的制备研究  

Study on synthesis of high viscosity carboxymethyl starch

作　　者：张海俊[1] 刘亚伟[1] 邢伟亮[1] 田景霞[1] 

机构地区：[1]河南工业大学粮油食品学院,河南郑州450052

出　　处：《食品工业科技》2008年第3期225-227,共3页Science and Technology of Food Industry

摘　　要：研究了在非均相体系中,采用分步加碱法制备高粘度羧甲基淀粉的方法。分析了反应温度、反应时间、碱用量、甲醇浓度、液固比、一氯乙酸(一氯乙酸钠)用量等对羧甲基淀粉粘度的影响,并得出获得高取代度羧甲基淀粉(CMS)的最佳实验条件为:nClCH2COOH/nAGU(摩尔比,下同)为0.93,nNaOH/nAGU(碱化时)为0.69,nNaOH/nAGU(醚化时)为0.26,反应温度为56℃,反应时间为2.8h,vCH3OH/wAGU为2.7,甲醇浓度为78.7%。经反应,制得的羧甲基淀粉的粘度(浓度为2%)为21760mPa.s。The synthesis of high viscosity carboxymethyl starch was prepared through the method of adding sodium hydroxide by twice steps in non-aqueous media. The effect of reaction temperature, reaction time, the amount of sodium hydroxide,the concentration of methanol, liquor/material ratio,the amount of monochloroacetic acid, etc were studied, and the optimal conditions to achieve the highest viscosity was as follows; the molar ratio of sodium hydroxide to AGU of 0.69,the molar ratio of monochloroacetic acid to AGU of 0.93,the molar ratio of the sodium hydroxide to AGU of 0.26, the reaction temperature at 56℃, the etherification time of 2.8h, liquor/material ratio of 2.7,the concentration of methanol was 78.7%. The carboxymethyl starch with a high viscosity of 21760mPa · s was obtained.

关 键 词：玉米淀粉 粘度 响应面分析 羧甲基淀粉 

分 类 号：TS235.9[轻工技术与工程—粮食、油脂及植物蛋白工程]