Multiple-channel emulsion chips utilizing pneumatic choppers for biotechnology applications.
The formation of micro-scale monodispersed emulsions is crucial for a variety of applications such as cosmetics, food industry and biotechnology. In this study, a new microfluidic chip with a multiple-channel layout for high-throughput emulsions is reported. This chip generated fine-tuned and uniform microdroplets in liquids with a higher throughput for emulsification applications. It employed a combination of multiple hydrodynamic flow focusing and liquid-cutting devices called "active pneumatic choppers." Experimental data indicated that oil-in-water microdroplets with diameters ranging from 6 to 120 microm can be successfully generated with a coefficient of variation less than 3.75%. The size of the droplets can be actively fine-tuned by using two approaches by adjusting relative sheath/sample flow velocity ratios and chopping frequency. Finally, two commonly used biocompatible materials, including collagen and calcium-alginate (Ca-alginate), were used to form microspheres by utilizing the liquid-cutting technique. The developed microfluidic chip is promising in various applications including biotechnology, nano-medicine and cosmetics.
Lin
Yen-Heng
YH
Department of Engineering Science, National Cheng Kung University, Tainan, Taiwan, Republic of China.
Chen
Cheng-Tso
CT
Huang
Lynn L H
LL
Lee
Gwo-Bin
GB
D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods; D004655:Emulsions / Q000032:analysis* / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods; D011312:Pressure
D004655:Emulsions