Creating a gas-liquid interface in a microchannel using porous polydimethylsiloxane (PDMS)

Abstract

In order to realize gas-liquid interface in microchannel, porous polydimethylsiloxane (PDMS) was fabricated and assembled with microchannels. Carbon dioxide absorption was used to demonstrate the effect of the gas-liquid interface. The carbon dioxide absorption was determined by pH color indicator and Matlab image processing method. The results demonstrated that the carbon dioxide was able to pass through the porous PDMS and be dissolved into the fluid with little water leakage and evaporation.