Microfluidic-assisted production of photocurable Polycaprolactone microparticles for efficient treatment of oily wastewater
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Polymeric microparticles have been recently considered as efficient and eco-friendly absorbents for the removal of organic pollutants in wastewater. Herein, we demonstrate a simple method to synthesize functional polycaprolactone diacrylate (PCLDA) microparticles by using PDMS microfluidic device. Various experimental conditions, including flow rates of the dispersed and continuous phases, as well as concentration of PCLDA hydrogel solution, are optimized to fabricate highly monodisperse microparticles. We then investigate the swelling behavior of PCLDA network in different organic solvents to demonstrate the capability of PCLDA microparticles in oil-water separation. The absorption capacity of particles in simulated wastewater containing toluene is subsequently examined in various effect factors, which shows the high separation efficiency of nearly 70% after 30 min and almost unchanged treatment capacity after 10 times of recycle test.