This study relates to water-in-oil-in-water (W/O/W) emulsion system using a simple fluidic device with two flow channels. We obtained uniform porous microspheres, where the inner water , middle oil , and outer water phases were a gelatin 7% wt in wa...
This study relates to water-in-oil-in-water (W/O/W) emulsion system using a simple fluidic device with two flow channels. We obtained uniform porous microspheres, where the inner water , middle oil , and outer water phases were a gelatin 7% wt in water solutions, poly-L-lactide (PLLA) 1% in dichloromethane (DCM), and poly(vinyl alcohol) (PVA) 3% in water solutions, respectively. It has porous structure containing open inner window, which can provide environments for proliferation of cells and infiltration of cell and nutrients. The cell infiltration strategy is based on open porous structure of microsphere by remove the gelatin An oil-in-water-in-oil(O/W/O) emulsion templating method was employed to fabricate macro-porous PLLA porous microspheres. An water-in-oil(W/O) emulsion was introduced into the fluidic device as the discontinuous phase with all other experimental conditions the same as for the micro-porous PLLA microspheres. Uniform macro-porous PLLA microspheres with a highly open porous structure were finally obtained after remove gelatin by immersed in warm water. Lager than 20μm surface pore size and high interconnectivity of the porous PLLA microspheres were observed by scanning electron microscopy (SEM). Inaddition, proliferation and penetration of cell into the PLLA porous microspheres was demonstrated by cell seeding and culture in microspheres. Afterwards, observed by confocal microscope and measured cell density by MTT assay.