| 초록 |
Electrospinning is a simple and effective nanofabrication method for the production of polymer nanofibers. Nevertheless, there are some materials that cannot be electrospun due to lack of suitable solvent or other reasons. Core-shell electrospinning may help to continuously produce nanofiber by building stable ejection of polymer fluid on Talor cone. In this study, coaxial electrospinning process was used to fabricate membranes made of core-shell fibers of a Poly(ethylene oxide) (PEO) shell and a Poly(vinyl alcohol) (PVA) core. Using high molecular weight PEO as a carrier to prevent the PVA core solution from solidifying and splashing and to increase the flow rate of solutions. For obtaining the PVA-rich nanofibrous membranes, the chemical cross-linking of PVA with PAA at high temperatures was performed and PEO washing process was followed. The fabricated nanofiber mats were characterized using scanning electron microscopy, differential scanning calorimetry, FT-IR and weight loss test. This electrospun core-shell nanofiber mats have a wide range of application because of its nontoxicity and simple fabrication method. |
