高校化学工程学报2011，Vol.25Issue(2)：212-218,7.
超声功率、频率对姜黄素浸取的影响与动力学模型
Dynamic Model of the Ultrasound-Assisted Extraction of the Curcumin from Curcuma longa L and the Effects of Ultrasound Intensity and Frequency on the Extraction
摘要
Abstract
The influences of temperature (293～353 K), ultrasound intensity (0.05～0.45 W·cm-2) and frequency (28 kHz, 40 kHz, 50 kHz, 135 kHz) on the ultrasound-assisted extraction (UE) of curcumin from Curcuma longa L with 65％ ethanol aqueous solution were investigated, respectively. According to the Fick law, the dynamic model of curcumin UE was deduced by using the separation of variables method, and the modified model obtained fits the experiment data well. Comparing to conventional extraction, ultrasound intensity and fiequency increase the superfical diffusion coefficient (Du) by 17.3％ ～38.5％ and 18.3％～40.4％, respectively. A higher ultrasonic intensity results in the increase both the diffusion coefficient (Du)and the concentration-affective coefficient (Pu). The influence of increasing the ultrasonic intensity on Du is stronger than that on Pu. But the increase of ultrasonic frequency results in the decrease of the increasing amplitude of Du and pu, and with a stronger influence on Du than on Pu. The possible causation of frequency effects on the extraction was discussed.关键词
姜黄素/超声浸取/超声功率/超声频率/动力学模型/姜黄Key words
curcumin/ultrasound-assisted extraction/ultrasound intensity/ultrasound frequency/dynamic model/Curcuma longa L分类
化学化工引用本文复制引用
曹雁平,矫庆泽..超声功率、频率对姜黄素浸取的影响与动力学模型[J].高校化学工程学报,2011,25(2):212-218,7.基金项目
国家"十一五"科技支撑计划项目(2006BAD27B03) （2006BAD27B03）
北京市自然科学基金项目(3062007)资助. （3062007）
