超声强化亚临界水萃取脱脂葡萄籽中原花青素的动力学研究

Dynamic study on ultrasound-assisted subcritical water extraction of proanthocyanidins from defatted grape seed

根据质量衡算微分模型和运用Fick第一定律,建立了超声强化亚临界水萃取(USWE)和亚临界水萃取(SWE)原花青素的动力学模型,并通过对比这2个模型说明了超声对亚临界水萃取的强化作用。结果表明,Y=5.3974×(1-e^(-0.001 4t))和Y=5.2019×(1-e^(-0.001 2t))分别是USWE和SWE原花青素的动力学模型,并且这2个动力学模型都能很好地模拟萃取的过程;对比这2个模型方程的参数可知,超声能够加快葡萄籽内部原花青素的扩散及促进其解吸,因此能够对SWE起到强化作用。

Based on the partial differential mathematical model of mass balance and the Fick＇s first law,the dynamic models of ultrasound -assisted subcritical water extraction（USWE） and subcritical water extraction（SWE） of proanthocyanidins are established,respectively. And then the effect of ultrasound on SWE is showed by analyzing the dynamic models of USWE and SWE.The results show that y=5.3974×（1-e^（-0.0014t）） and Y=5.2019×（1-e^（-0.0012t）） are the dynamic models of USWE and SWE,and the two dynamic models are well used to model the USWE and SWE process of proanthocyanidins from grape seed.It can be known that ultrasound can enhance the diffusion of proanthocyanidins in the interior of grape seed and stimulate the desorption of it,thus can enhance SWE,by comparing the parameters between the dynamic models of USWE and SWE.