In this paper, we propose a new fabrication method for pH-responsive microfluidic valves. Conventionally, an in situ photopolymerization method has been employed to build the micro functional structure inside a microfluidic channel. Here, we suggest a new method that allows the mass production of a stimuli-responsive microsystem through the use of a pre-made microstructure as an actuating element, like the assembly of commercial products in a factory. We have massively fabricated pH-responsive microspheres that act as an actuating component through the use of PDMS-based microfluidic apparatus and an 'on the fly' photopolymerization method. By incorporation of this microsphere into the microvalve during the fabrication process, we have produced a pH-responsive microfluidic valve in a simple way. The operation and the function of the fabricated microvalve were evaluated through diverse experiments. The microvalve was successfully fabricated, and functioned well according to the pH change.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Mechanics of Materials
- Mechanical Engineering
- Electrical and Electronic Engineering