Effect of nano-particles on droplet coalescence in microchannel device

WANG Kai; YI Shiting; ZHOU Qianqian; LUO Guangsheng

doi:10.11949/j.issn.0438-1157.20151273

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Effect of nano-particles on droplet coalescence in microchannel device

更新时间：2025-12-10

- Effect of nano-particles on droplet coalescence in microchannel device
- CIESC Journal Issue 2, Pages: 469-475(2016)
- 作者机构：
  
  清华大学化学工程联合国家重点实验室,北京,100084
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151273
  CLC： Q025.5
- Online First：05 February 2016，
  
  Published：05 February 2016
- 稿件说明：
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WANG Kai, YI Shiting, ZHOU Qianqian, et al. Effect of nano-particles on droplet coalescence in microchannel device[J]. CIESC Journal, 2016, (2): 469-475.
DOI：

WANG Kai, YI Shiting, ZHOU Qianqian, et al. Effect of nano-particles on droplet coalescence in microchannel device[J]. CIESC Journal, 2016, (2): 469-475. DOI： 10.11949/j.issn.0438-1157.20151273.

摘要

Pickering 乳液是纳米颗粒稳定的液液两相体系

微流控技术是制备单分散Pickering 乳液的有效方法

而含有纳米颗粒体系在微通道内的液滴聚并规律是该实施方法的关键科学问题之一。以正辛醇为连续相

水为分散相

研究了六边形扩大微通道内液滴碰撞过程

发现了液滴聚并、碰撞不聚并和不相互接触3 种流动状态

研究了流量、颗粒浓度和颗粒亲疏水性对于液滴聚并率的影响规律

分析了颗粒在液膜排空过程中的作用机理。

Abstract

Pickering emulsion is a liquid/liquid system stabilized by nano-particles. Microfluidic technology is an important method for preparing monodispersed Pickering emulsions. The droplet coalescence rule for the working system containing nano-particles is a core scientific issue for proceeding this new method. Using n-octanol and water as the continuous and dispersed phases respectively

the droplet collision processes in a broadening microchannel with a hexagon shape were investigated. Three typical flows (droplet coalescence

contact without coalescence and contactless) were confirmed. The effects of flow rate

nano-particle concentration and wetting property of nano-particles on the droplet coalescence percentage were studied. In addition

the working mechanism of nano-particles in the liquid film drainage processes were analyzed.

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