微波场作用下溶质的化学势与平衡浓度  

Chemical Potential and Equilibrium Concentration of Solute Under the Influence of an Applied Microwave Field

作　　者：陈明东[1] 韩光泽[2] 郭平生[3] 

机构地区：[1]华南理工大学物理实验中心,广州510640 [2]华南理工大学物理系,广州510640 [3]广西师范大学物理与信息工程学院,广西桂林541700

出　　处：《重庆理工大学学报（自然科学）》2013年第8期54-57,84,共5页Journal of Chongqing University of Technology：Natural Science

基　　金：广东省自然科学基金资助项目(S2011010000739);广东省科技计划项目(2012B050600012)

摘　　要：溶液中溶质扩散的驱动力是化学势梯度的负值,所以微波场作用下溶质的化学势是研究微波强化传质过程的一个重要物理量。基于热力学理论和电磁波在介质中的传播规律,导出了微波定向辐射时微波场作用下溶质的化学势与微波入射深度以及分子物理参数间的关系式,然后利用微波场作用下化学势的变化规律,推导出微波强化传质过程中溶质平衡浓度与微波入射深度间的表达式。所得结论能丰富微波场协同强化传质理论,同时也能为应用微波强化进行中草药提取的工业化生产提供理论参考。The negative gradient of chemical potential in solution is the driving force of solute diffu-sion, so the chemical potential of solute due to the effect of microwaves is an important physical quan-tity for studying on mass transfer enhancement with microwave field. Based on the thermodynamic the-ory and the principle of electromagnetic wave propagation in medium, an expression about the chemi-cal potential of solute in directed radiation of microwave field, with the dependence on the incidence depth of microwaves and the physical parameters of molecules was derived. And then used the chan- ging rule of chemical potential under the influence of an applied microwave field, the relationship be- tween the equilibrium concentration of solute and the incidence depth of microwaves is obtained. The conclusion in this paper could enrich the mass transfer enhancement theory under the influence of an applied microwave field, and it could also provide a theoretical guide to the industrialization of micro-wave-assisted extraction of effective compounds from Chinese herbs.

关 键 词：微波场 化学势 扩散 平衡浓度 

分 类 号：O441.6[理学—电磁学]