TY  - THES
T1  - A droplet-based microfluidic scheme for complex chemical reactions
A1  - Chokkalingam,Venkatachalam
Y1  - 2010/12/22
N2  - In the present work, a novel droplet-based microfluidic scheme is developed to perform chemical reactions. The chemical reactants are dispensed with precise volume control into pairs of droplets produced via step-emulsification. The reaction is activated by merging the pairs of droplets by a geometrical constriction and fast mixing inside the merged droplets. Furthermore, the post-processing of the chemical products is also included within the microfluidic device. 
This microfluidic reaction scheme allows performing precisely volume controlled reactions with long and stable operation conditions without any clogging even if precipitates or sticky gels are formed during the reaction. We demonstrate the potential of our microfluidic scheme by producing mesoporous silica particles from a rapid gelation optimized sol-gel synthesis route. The produced silica particles have a superior surface area of about 820 m2g-1 and a narrow pore radius distribution around 2.4 nm. This microfluidic scheme is quite universal and therefore, only the chemical recipe needed slight modifications to produce platinum doped silica catalysts with superior catalytic behavior than commercially available catalysts.

KW  - Mikrofluidik
KW  - MEMS
CY  - Saarbrücken
PB  - Universitäts- und Landesbibliothek
AD  - Postfach 151141, 66041 Saarbrücken
UR  - http://scidok.sulb.uni-saarland.de/volltexte/2010/3486
ER  -