| 초록 |
Electrospun Poly(vinyl alcohol) (PVA) nanofiber is expected to have significant applications in the area of filtration, desalination, biomedical engineering, and protective clothing fabrication, etc. Nevertheless, PVA exhibits poor spinnability because PVA aqueous solution forms clusters caused by strong hydrogen bonds between the chains and water, causing splashing of the PVA solution during the electrospinning. Here, the productivity of electrospun PVA nanofiber was enhanced by coaxial electrospinning where Poly(ethylene oxide) (PEO) in the shell covered PVA core to prevent drying on the PVA surface, resulting in reducing the cluster formation. PEO shell can easily be removed by washing it with alcohol. Effects of PVA molecular weight and concentration, applied electric field, and PEO/PVA volume ratio on the coaxial electrospinning will be demonstrated. Coaxial PEO-PVA nanofibers were characterized using scanning electron microscopy, differential scanning calorimetry, and FT-IR. |
