摘要
以姜黄为原料,在338K,超声功率0.25W·cm-2,超声频率50kHz条件下,研究了姜黄的粒度、液料比、乙醇体积分数对姜黄素超声间歇浸取过程的影响.基于Fick定律,采用分离变量法建立了包含粒度、液料比、乙醇体积分数影响的姜黄素超声间歇浸取动力学方程,模拟结果与实验数据吻合较好.与常规浸取相比,在姜黄素超声间歇浸取中液料比的影响作用降低了6.22%,粒度、乙醇体积分数的影响作用则分别提高29.9%和8.18%.探讨了粒度、液料比和乙醇体积分数影响超声浸取效果的原因,超声的特殊性质使得粒度、液料比和乙醇体积分数对浸取的影响发生变化.为超声强化姜黄素等植物有效成分的浸取提供了理论依据.
Ultrasonic batch extraction of curcumin fromCurcuma longaL.had been carried out with an ultrasound cleaning bath（0.25W·cm-2,50kHz,338K）,and it was investigated that the influence of particle size,ratio of solvent to solid and ethanol volume fraction on the concentration of the curcumin.According to the Fick law,the dynamic model of curcumin ultrasonic batch extraction was deduced by using the separation of variables method,and the modified model fits the experiment data well.Comparing to conventional extraction,the influence of ratio of solvent to solid decreased by 6.22%,but the effect of particle size and ethanol volume fraction increased by 29.9%and 8.18%,respectively.The possible causation of particle size,ratio of solvent to solid and ethanol volume fraction effects in the extraction was discussed,and the changes in these three factors caused by ultrasonic properties accordingly affect on the effect of the extraction.Therefore the modified model can provide the valuable theory basis for the technical design of curcumin extraction process.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第8期1000-1004,共5页
Transactions of Beijing Institute of Technology
基金
国家部委科技支撑计划项目(2006BAD27B03)
北京市自然科学基金资助项目(3062007)
关键词
姜黄素
超声间歇浸取
动力学
粒度
液料比
乙醇体积分数
curcumin
ultrasonic batch extraction
dynamics
particle size
ratio of solvent to solid
ethanol volume fraction
