通过控制润湿性在微流控装置中由剪切力诱导形成单分散液滴。

Shear force induced monodisperse droplet formation in a microfluidic device by controlling wetting properties.

作者信息

Xu J H, Luo G S, Li S W, Chen G G

机构信息

The State Key Lab of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.

出版信息

Lab Chip. 2006 Jan;6(1):131-6. doi: 10.1039/b509939k. Epub 2005 Nov 1.

DOI:10.1039/b509939k

PMID:16372080

Abstract

Perpendicular flow is used to induce oil droplet breakup by using a capillary as water phase flow channel. It is a new route to produce monodisperse emulsions. The wetting properties of the fluids on the walls are exceedingly important parameters. Depending on the oil and water flow rates, different spatial distributions of the two phases as laminar, plugs, cobbles and drops, are obtained. The effects of two-phase flow rates on plugs and drop size are studied, and the different droplet formation mechanisms of plug flow and drop flow are discussed. Two quantitative equations utilized to predict the droplet size are developed.

摘要

通过使用毛细管作为水相流动通道，利用垂直流来诱导油滴破裂。这是生产单分散乳液的一条新途径。流体在壁面上的润湿性是极其重要的参数。根据油和水的流速，可获得两相不同的空间分布，如层流、段塞流、卵石流和滴流。研究了两相流速对段塞和液滴尺寸的影响，并讨论了段塞流和滴流不同的液滴形成机制。建立了两个用于预测液滴尺寸的定量方程。