Controlled size production of large double droplets in one-step microfluidic devices

被引：0

作者：

Xu L. ^{[1
,2
]}

Pan D. ^{[1
,2
]}

Deng C. ^{[3
]}

Huang W. ^{[1
]}

Liu M. ^{[2
]}

机构：

[1] School of Chemical Engineering, Sichuan University, Chengdu, 610065, Sichuan

[2] Research Center of Laser Fusion, CAEP, Mianyang, 621900, Sichuan

[3] National Key Laboratory of Reactor System Design Technology, Nuclear Power Institute of China, Chengdu, 610041, Sichuan

来源：

Huagong Xuebao/CIESC Journal | 2019年 / 70卷 / 12期

关键词：

Double droplets; Hydrodynamics; Inertial confinement fusion; Microchannels; Multiphase flow;

D O I：

10.11949/0438-1157.20190413

中图分类号：

学科分类号：

摘要：

The precise regulation of the composite latex geometry is important for the controllable preparation of polymer hollow microspheres to achieve specific specifications. Based on one-step microfluidic device, extensive experiments for double droplet preparation are conducted and the flow pattern diagram dependent on capillary number of continuous phase, CaW2, and the flow rate ratio of oil phase to inner phase, RO/W1, is obtained, and further the effects of the Ca, RO/W1 and the diameter of external phase tube on the large double droplets size are discussed in this work. As CaW2 increases, the droplet sizes, regarding inner diameter, shell thickness and outer diameter, decrease because of a large drag force generated by a continuous phase. With the RO/W1 increasing, the inner diameter decreases, while the shell thickness increases. However, as for the outer diameter of such double droplet, it initially decreases and then increases. In addition, the droplet sizes increase as the tube diameter increases under the same flow rate of all three phases, but it is always limited by the tube diameter. The present work could provide some guidelines for controllable and precise fabrication of double droplets with large diameter. © All Right Reserved.

引用

页码：4617 / 4624

页数：7

共 30 条

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