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Hollow Poly(lactic acid) and Poly(lactic acid)/polyethylene glycol Microspheres Prepared by A Simple Fluidic Device

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Fig. 2. The variation in size of 2 wt% PLA microspheres prepared in continuous phases at different flow rates before and after evaporation of the solvent
Fig. 4. (a) SEM images and (b) size distribution of porous PLA microsphere prepared at continuous flow rate of 10 ml/min
Fig. 5. SEM images of surface and cross-section of porous PLA microspheres as a function of tridecane concentration of (a) 0 wt%, (b) 2 wt%, (c) 4 wt%, (d) 6 wt%, and (e) 8 wt%, respectively
Fig. 6. SEM images of surface and cross-section of porous PLA/PEG microspheres as a function of TD concentration of (a) 0 wt%, (b) 2 wt%, (c) 4 wt%, (d) 6 wt%, and (e) 8 wt%, respectively
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