玉米淀粉多元醇液化工艺研究  

Study on Liquefaction Technology of Cornstarch in Polyhydric Alcohols

作　　者：黄元波[1] 郑云武[1] 郑志锋[1] 周琼[1] 冯昊[1] 

机构地区：[1]西南林业大学西南山地森林资源保育与利用省部共建教育部重点实验室,木质科学与装饰工程学院,云南昆明650224

出　　处：《西南林学院学报》2011年第1期72-74,83,共4页Journal of Southwest Forestry College

基　　金：国家自然科学基金项目(30800867)资助;教育部科学技术研究重点项目(209117)资助;云南省自然科学基金项目(2007C068M)资助;云南省教育厅科学研究重点基金项目(08Z0026)资助;云南省高校生物质材料工程研究中心资助

摘　　要：通过单因素实验法,研究了液化剂配比、液化时间、液化温度、催化剂用量、玉米淀粉与液化剂配比对玉米淀粉液化效果和液化产物羟值的影响。结果表明,硫酸是玉米淀粉多元醇液化的有效催化剂;玉米淀粉最佳液化工艺为:玉米淀粉与液化剂质量比为1∶6,硫酸用量为液化剂质量的3%,液化剂中PEG 400和甘油质量比为7∶3,液化时间25 min,液化温度150℃,此条件下液化残渣率为2.0%,所制备的玉米淀粉液化产物羟值为447.0 mgKOH/g。Effects of reaction parameters, including the solvent ratio, liquefaction duration, temperature, catalyst dosage, ratio of cornstarch and the solvent on the liquefaction of cornstarch in polyhydric alcohols and its lique- fied products were studied by means of single-factor experiment method. The results showed that sulfuric acid was an effective catalyst to the liquefaction of cornstarch in polyhydric alcohols. The optimal liquefaction technology in- cluded： ratio of cornstarch to solvent （mixture of PEG 400 and glycerin） was 1：6 （w/w） ; dosage of sulfuric acid was 3% of the solvent; ratio of PEG 400 to glycerin in the solvent was 7：3 （w/w） ; the reaction time was 25 min, and the reaction temperature was 150℃, respectively. The residue percentage was 2.0% and the liquefied product was 447.0 mg KOH/g under the optimal liquefaction conditions.

关 键 词：玉米淀粉 多元醇 液化 羟值 

分 类 号：S785[农业科学—林学]