基于超声波辅助提取中药材中化学成分的非稳态扩散过程，根据Fick第二定律建立桑黄子实体多糖的超声波协同纤维素酶法提取过程的动力学模型。以桑黄子实体为原料，分别对桑黄多糖的热水提取和超声法协同纤维素酶提取过程建立动力学模型，并对模型进行试验验证，求解相应的动力学参数；得到速率常数、活化能、相对萃余率等一系列动力学参数。研究结果显示试验数据与动力学模型计算值吻合良好，可为桑黄多糖提取工艺放大和深入理论研究提供一定的依据。

Based on the unsteady diffusion processing of ultrasonic assisted extraction of chemical composition from Chinese herbal medicine, the extraction process model of ultrasonic assisted cellulase was estibulished to extract polysaccharide from the fruiting bodies of Phellinus igniarius according to Fick's second law. The dynamics processing model of hot water extraction and ultrasonic assisted cellulase extraction was developed and verified by experiments. A series of dynamic parameters of rate constant, activation energy and relative extraction rate were analyzed. The results showed that the experimental data well coincide with the dynamic model calculated values, and the models could describe the process well. The result provided certain basis for Phellinus igniarius polysaccharide extraction magnification engineering and in-depth theoretical study of polysaccharide extraction processing.

陕西省教育厅自然科学基金项目（08JK232）