基于电流监测法的粗糙表面微通道电渗流实验研究

徐涛, 杨大勇

徐涛, 杨大勇. 基于电流监测法的粗糙表面微通道电渗流实验研究[J]. 实验流体力学, 2015, (4): 41-46. DOI: 10.11729/syltlx20140112
引用本文: 徐涛, 杨大勇. 基于电流监测法的粗糙表面微通道电渗流实验研究[J]. 实验流体力学, 2015, (4): 41-46. DOI: 10.11729/syltlx20140112
Xu Tao, Yang Dayong. Experimental research of electroosmotic flow in rough microchannels based on current-monitoring method[J]. Journal of Experiments in Fluid Mechanics, 2015, (4): 41-46. DOI: 10.11729/syltlx20140112
Citation: Xu Tao, Yang Dayong. Experimental research of electroosmotic flow in rough microchannels based on current-monitoring method[J]. Journal of Experiments in Fluid Mechanics, 2015, (4): 41-46. DOI: 10.11729/syltlx20140112

基于电流监测法的粗糙表面微通道电渗流实验研究

基金项目: 

国家自然科学基金资助项目

详细信息
  • 中图分类号: 11-5266/V

Experimental research of electroosmotic flow in rough microchannels based on current-monitoring method

  • 摘要: 制作2种 PMMA 微流控芯片,对其微通道内表面参数进行测试。基于电流监测法,设计微流控芯片电渗流检测系统。首先测量光滑微通道电渗流速度,验证了实验的可行性,并可以预测微通道的表面电势;然后对粗糙微通道电渗流进行测量;最后对比分析电场强度、溶液浓度等对光滑和粗糙微通道电渗流的影响。结果表明:(1)不规则粗糙表面微通道电渗流速度随电场强度、溶液浓度的变化规律和光滑表面微通道一致;(2)相对于光滑表面微通道,粗糙表面微通道电渗流速度明显降低;当相对微通道深度为5%时,降低幅度约为23%。(3)随着电场强度或者溶液浓度的增大,粗糙和光滑微通道电渗流速度的差距增大。所用实验方法具有直观、方便和成本低的优点。
    Abstract: Two kinds of PMMA microfluidic chips were manufactured,and the surface param-eters of the microchannels were tested.A electroosmotic flow (EOF)experimental system with the microfluidic chip was designed based on the current-monitoring method.Firstly,the EOF ve-locity in smooth microchannels was measured,which validated the feasibility of the experimental method.The method can predict the microchannel surface potential.Secondly,the EOF velocity in rough microchannels was measured.Finally,the influence of the electric strength and ionic concentration on the EOF in smooth and rough microchannels was analyzed .The results show that:(1 )The EOF velocity in smooth and rough microchannels is proportional to the electric strength;the EOF velocity decreases with the increase of ionic concentration both in smooth and rough microchannels.(2)The EOF velocity in rough microchannels is significantly decreased. The velocity is decreased by 23%,when the relative roughness is 5%.(3)The gap between the EOF velocities in smooth and rough microchannels increases with the increase of electric strength or solution concentration.The experimental method possesses the advantage of being intuitive, convenient and low cost.
  • 期刊类型引用(1)

    1. 唐扬刚,吴敬涛,邓文亮. 过冷大水滴撞击结冰特性实验研究. 低温工程. 2022(04): 42-48 . 百度学术

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出版历程
  • 刊出日期:  2015-08-24

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