earticle

영어

Monodisperse gelatin beads with a uniform pore size were fabricated from gelatin using a simple fluidic device fabricated with a Tygon tube, a syringe needle, and a glass capillary. Toluene and an aqueous gelatin solution are served as the discontinuous and continuous phases in the fluidic device, respectively. Oil-in-water emulsion droplets with a uniform diameter were pinched off from the tip of the capillary tube and subsequently frozen in liquid nitrogen. The frozen O/W emulsion droplets evolved into porous beads with a uniform pore size after removal of toluene and then freeze-drying. Due to the uniform size of toluene droplets in water phase, the porous beads exhibited a uniform pore size. The number and size of pores in the porous beads can be easily controlled by changing the flow rate of each phase.