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共轴微通道水相微球制备

Preparation and Measurement of Microsphere in Coaxial Microchannel of Oil and Water Two Phase Flow
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摘要 本文以竖直共轴微通道为研究对象,采用去离子水为分散相、5W-20润滑油为连续相,二者在微通道内形成两相流,在管外收集到单分散水相微球,分散相流量Qd的变化范围6ml/h^84ml/h,连续相流量Qc的变化范围6ml/h^192ml/h。发现在以连续相流量Qc为横坐标、分散相流量Qd为纵坐标的水相微球直径图中,单分散水相微球的形成区域存在一条穹顶形边界。单分散的水相微球分布在此边界下部,随着连续相流量Qc的增加,单分散水相微球的形成边界呈现出先上升后下降的趋势。形成单分散水相微球的Qd<60ml/h。单分散水相微球直径与两相流量比(Qd/Qc)呈现出对数增加的关系。 This thesis takes vertical coaxial microchannels as the research object,using deionized water as the dispersed phase,and 5 W-20 lubricating oil as the continuous phase. The two form a two-phase flow in the microchannel and collect monodisperse aqueous microspheres outside the tube. The flow rate of the dispersed phase Qd ranges from 6 ml/h to 84 ml/h,and the continuous phase flow rate Qc varies from 6 ml/h to 192 ml/h. It was found that in the diameter diagram of the aqueous phase microspheres in which the continuous phase flow rate Qc is the abscissa and the dispersed phase flow rate Qd is the ordinate,there is a dome-shaped boundary in the formation region of the monodisperse aqueous phase microspheres. The monodisperse aqueous microspheres are distributed in the lower part of the boundary. With the increase of the continuous phase flow rate Qc,the formation boundary of the monodisperse aqueous microspheres first rises and then decreases. The Qd of the monodisperse aqueous microspheres was Qd 60 ml/h. The diameter of monodisperse aqueous phase microsphere and the two-phase flow ratio(Qd/Qc) show a logarithmic relationship.
作者 伊春明 许阁 张金松 Yi Chunming;Xu Ge;Zhang Jinsong.
出处 《计量与测试技术》 2018年第7期26-28,31,共4页 Metrology & Measurement Technique
关键词 共轴微通道 油水两相流 单分散微球 coaxial microchannel oil - water two - phase flow monodisperse microsphere
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