飞天蜈蚣七多糖提取动力学研究  

Kinetic model for extraction of polysaccharide from Aralia chinensis L.

作　　者：刘存菊[1] 李稳宏[1] 雒羽[1] 李斌[1] 王军策[1] 李宏[1] 

机构地区：[1]西北大学化工学院,陕西西安710069

出　　处：《化学工程》2012年第7期1-5,共5页Chemical Engineering(China)

基　　金：陕西省教育厅专项资助项目(09JK737);西北大学科学研究基金资助项目(09NW04);西北大学重点实验室开放基金资助项目(KF09015)

摘　　要：根据中草药浸提机制和扩散理论对飞天蜈蚣七多糖浸提的动力学进行初步研究。以Fick第二定律为基础,采用球形模型讨论液料比、提取时间、提取温度与飞天蜈蚣七中多糖浸出量之间的关系,从而建立提取过程中动力学模型,并由此推算出浸提多糖过程中的速率常数、活化能、相对萃余率、有效扩散系数等动力学参数。飞天蜈蚣七中多糖的浸出量随着温度的升高而增加、随着液料比的变化而变化、随着提取时间的增长而逐渐增加并最终趋于平衡;浸提多糖的相对萃余率符合指数模型;有效扩散系数也随着温度升高而增加并受到液料比的影响。研究得到的动力学模型可为飞天蜈蚣七多糖提取的工艺条件优化和深层次研究奠定理论基础。The kinetic model for the extraction of polysaccharide from Aralia chinensis L. was studied based on the mechanism of extraction and diffusion. According to Fick＇ s second law of diffusion and ball model, the kinetic model of polysaccharide extraction was established at different temperatures, different ratio of solvents to solid and different extraction time. The kinetic parameters, such as rate constant, activation energy, relative yield and effective diffusion coefficient were gained. The result shows that the concentration of polysaccharide from Aralia chinensis L. increases with the temperature rise and is also influenced by both the ratio of solvent to solid and extraction time, and the three factors of which have the same effect on the diffusion coefficient;the relative yield of polysaceharide accords with the exponential model. The kinetic model established lays the foundation for the optimization of technological conditions and further theoretical study.

关 键 词：飞天蜈蚣七 多糖 动力学模型 浸提 

分 类 号：TQ461[化学工程—制药化工]