Generating gas/liquid/liquid three-phase microdispersed systems in double T-junctions microfluidic device

被引：46

作者：

Wang, K. ^{[1
]}

Lu, Y. C. ^{[1
]}

Tan, J. ^{[1
]}

Yang, B. D. ^{[1
]}

Luo, G. S. ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem Engn, State Key Lab Chem Engn, Beijing 100084, Peoples R China

来源：

MICROFLUIDICS AND NANOFLUIDICS | 2010年 / 8卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Gas/liquid/liquid; Three-phase; Microfluidic; T-junction microchannel; EMULSIONS; FLOW; DROPLETS; BUBBLES;

D O I：

10.1007/s10404-009-0514-6

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This article describes the generation of microdispersed bubbles and droplets in a double T-junctions microfluidic device to form immiscible gas/liquid/liquid three-phase flowing systems. Segmented gas plugs are controllably prepared in water at the first T-junction to form gas/liquid two-phase fluid with the perpendicular flow cutting method. Then using this two-phase fluid as the cross-shearing fluid for the oil phase at the second T-junction, the gas/liquid/liquid three-phase flowing systems are prepared. Interestingly, it is found that the break-up of the oil droplets is mainly dominated by the cutting effect of the gas/liquid interface or the pressure drop across the emerging droplet, but independent with the viscous shearing effect of the continuous phase, even at the capillary number (Ca = u (w)mu(w)/gamma(ow)) higher than 0.01. The size laws and the distributions of the bubbles and droplets are investigated carefully, and a mathematical model has been developed to relating the operating conditions with the dispersed sizes.

引用

页码：813 / 821

页数：9

共 22 条

[1] Experimental observations of the squeezing-to-dripping transition in T-shaped microfluidic junctions [J].

Christopher, Gordon F. ;

Noharuddin, N. Nadia ;

Taylor, Joshua A. ;

Anna, Shelley L. .

PHYSICAL REVIEW E, 2008, 78 (03)

[2] Controlled production of emulsions and particles by milli- and microfluidic techniques [J].

Engl, W. ;

Backov, R. ;

Panizza, P. .

CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2008, 13 (04) :206-216

[3] The pressure drop along rectangular microchannels containing bubbles [J].

Fuerstman, Michael J. ;

Lai, Ann ;

Thurlow, Meghan E. ;

Shevkoplyas, Sergey S. ;

Stone, Howard A. ;

Whitesides, George M. .

LAB ON A CHIP, 2007, 7 (11) :1479-1489

[4] Formation of droplets and bubbles in a microfluidic T-junction - scaling and mechanism of break-up [J].

Garstecki, P ;

Fuerstman, MJ ;

Stone, HA ;

Whitesides, GM .

LAB ON A CHIP, 2006, 6 (03) :437-446

[5] Measuring Rapid Enzymatic Kinetics by Electrochemical Method in Droplet-Based Microfluidic Devices with Pneumatic Valves [J].

Han, Zuoyan ;

Li, Wentao ;

Huang, Yanyi ;

Zheng, Bo .

ANALYTICAL CHEMISTRY, 2009, 81 (14) :5840-5845

[6] Synthesis of composite emulsions and complex foams with the use of microfluidic flow-focusing devices [J].

Hashimoto, Michinao ;

Garstecki, Piotr ;

Whitesides, George M. .

SMALL, 2007, 3 (10) :1792-1802

[7] Synthesizing Microcapsules with Controlled Geometrical and Mechanical Properties with Microfluidic Double Emulsion Technology [J].

Hennequin, Yves ;

Pannacci, Nicolas ;

de Torres, Concepcion Pulido ;

Tetradis-Meris, Georgios ;

Chapuliot, Stephane ;

Bouchaud, Elisabeth ;

Tabeling, Patrick .

LANGMUIR, 2009, 25 (14) :7857-7861

[8] Microfluidic emulsions with dynamic compound drops [J].

Khan, Saif A. ;

Duraiswamy, Suhanya .

LAB ON A CHIP, 2009, 9 (13) :1840-1842

[9]

LI SW, 2009, MICROMECH MICROENG, V19

[10] Application of a capillary microreactor for selective hydrogenation of α,β-unsaturated aldehydes in aqueous multiphase catalysis [J].

Önal, Y ;

Lucas, M ;

Claus, P .

CHEMICAL ENGINEERING & TECHNOLOGY, 2005, 28 (09) :972-978

← 1 2 3 →