Particle separation by a moving air-liquid interface in a microchannel

作者：Wang Fengkun; Chon Chan Hee; Li Dongqing^*

来源：Journal of Colloid and Interface Science, 2010, 352(2): 580-584.

DOI：10.1016/j.jcis.2010.08.062

• Microfluidic
• Particle separation
• Air-liquid interface
• Interface speed
• Film thickness

Particle separation is an important topic in microfluidic field and has recently gained significant attention in sample preparations for biological and chemical studies In this paper a novel particle separation method was proposed In this method the particles were separated by the air-liquid interface in a micro channel The motion of the air-liquid interface was controlled with a syringe pump Depending on the air-liquid interface speed the liquid film thickness and the viscous force on particles were changed and the particles were separated by sizes We observed the separation of 1 01 mu m particles from the larger particles when the air-liquid interface speed was less than 11 mu m/s and the separation of both 1 01 mu m and 5 09 mu m particles from the larger particles when the interface speed was between 11 mu m/s and 120 mu m/s When the speed was higher than 120 mu m/s the drag force of the liquid flow generated by the advancing Interface o

• 出版日期2010-12-15
• 单位中原工学院