离子选择性系统PAA聚合物粘弹性电解质电渗流  

Electroosmotic flow of PAA polymer viscoelastic electrolyte in ion selective system

作　　者：张来 吕卓遥 张志浩 杜昌隆 李捷[1] ZHANG Lai;L Zhuo-yao;ZHANG Zhi-hao;DU Chang-long;LI Jie(School of Naval Architecture,Ocean and Energy Power Engineering,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学船海与能源动力工程学院,湖北武汉430063

出　　处：《应用化工》2022年第S01期118-122,127,共6页Applied Chemical Industry

摘　　要：采用有限体积法求解微米尺度下离子选择性系统粘弹性电解质电渗流并对该数值方法进行验证。依据聚丙烯酰胺(Polyacrylamide, PAA)聚合物浓度给出粘弹性流体特征参数,分析聚合物浓度和外加电势对系统离子分布、流速及离子电流密度的影响。结果表明聚合物粘弹性电解质相对牛顿流体电解质可大幅降低系统流速,有效提升系统的稳定性并降低选择性表面的离子通量;在选择性表面离子通量相同时,相对于牛顿流体,聚合物溶液可以使阳离子更稳定地通过或沉积在选择性表面。The article used the finite volume method to solve the viscoelastic electrolyte electroosmotic flow in the ion-selective system at the micrometer scale and validated the numerical method.The viscoelastic fluid characteristic parameters were given according to the polymer concentration of Polyacrylamide(PAA),and the effects of polymer concentration and applied potential on ion distribution,flow rate and ion current density of the system were analyzed.The results show that polymer viscoelastic electrolyte can significantly reduce the flow rate of the system compared with Newtonian fluid electrolyte,which can effectively improve the stability of the system and reduce the ion flux of the selective surface.At the same ionic flux on the selective surface,the polymer solution can make the cation pass through or deposit on the selective surface more stably than the Newtonian fluid.

关 键 词：离子选择性系统 粘弹性流体 PAA聚合物溶液 电渗流 

分 类 号：TQ051.8[化学工程]