中文摘要：

以绿茶为研究对象,通过水力空化-真空技术的结合提取茶多酚,设计了水力空化-真空一体提取设备,研究了乙醇体积分数、水力空化压力、水力空化时间、真空度、液料比（m L/g）、水力空化温度等影响因素对茶多酚提取率的影响,以单因素实验为基础,利用响应面优化了水力空化-真空一体提取最佳工艺。结果表明,水力空化-真空一体提取最优工艺条件：水力空化压力0.43 MPa、水力空化时间28.7 min、水力空化温度73℃、乙醇体积分数80%、液料比20、真空度0.6 MPa,提取率28.19%。

英文摘要：

Hydraulic and vacuum are used to extract polyphenols from green tea. The integrated hydraulic cavitation-vacuum extraction equipment is designed. The effects of ethanol concentration,hydrodynamic cavitation pressure,hydrodynamic cavitation time,vacuum degree,liquid to material ratio,hydrodynamic cavitation temperature on the extraction of tea polyphenols are researched. Based on single factor experiments,the best conditions are obtained using response surface methodology. The optimal technological conditions for extraction of hydraulic cavitation and vacuum are shown as follows： 80% of the ethanol concentration,0. 43 MPa of hydrodynamic cavitation pressure,28. 7minutes of hydrodynamic cavitation time,0. 6 MPa of vacuum degree,20 of liquid to material ratio and 73℃ of hydrodynamic cavitation temperature. Under the optimal condition,the extraction rate is 28. 19%.