| 초록 |
In order to prepared ultrafine fiber by electrospinning method from polyvinylacetate(PVAc) fiber. PVAc dissolved in acetone solvent were electrospun at various conditions. The PVAc solution of various concentrations(10~25wt%) were applied under different voltage(10~20kV), flow rate(50~100㎕/min), and tip-to collector distances(7.5~20cm). For the concentration lower than 15wt%, bead fiber were formed partially. As the concentration of spinning solution increased, the viscosity of PVAc solution increased linearly from 12cP to 228cP. The diameter of electrospun PVAc fiber change from approximately 300nm to 2500nm depends on the flow rate 100㎕/min, applied voltage 12.5kV and TCD 10cm. Over the 15kV applied voltage, the fiber diameter increased. Because it seem to be not fully developed Tayor corn, owe to charge acceleration increased rapidly. In the case of 20wt% PVAc, we obtained ultrafine electrospun PVAc fiber having approximately 1300nm diameter under flow rate 100㎕/min, applied voltage 12.5kV and TCD 10cm. |
