Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5364578 | Applied Surface Science | 2012 | 8 Pages |
Here, we report some unique crystalline morphologies of poly(lactic acid) (PLA) via organic solvent-induced crystallization. It was revealed that the surface morphology of PLA can be fine tuned by simply varying the volume ratio of a mixed solvent (acetone/ethanol). By increasing the ethanol content in the mixed solvent, we observed a morphological evolution of PLA surface from spherulite to shish-kebab and bamboo-cage-like structure. It was also interesting to find that the initial surface structure of PLA plays an important role to determine the final solvent-induced crystalline morphology. This work provides a new method for manipulating PLA crystal morphology through a simple solvent-induced crystallization.
Graphical abstractDownload full-size imageHighlights⺠PLA crystal morphologies can be tuned by adjusting acetone/ethanol ratio. ⺠Beautiful PLA shish-kebab crystals can be easily observed using SEM. ⺠Fractured surface is important for the morphological evolution of PLA surface.