静电纺制备CS/PVP纳米纤维膜纺丝工艺的研究

摘要

In order to study the effect of electrospinning parameters on morphology and diameter of CS / PVP nanofiber membrane. We took acid as solvent and prepared CS solutions with the concentration 4%,took ethanol as solvent and prepared PVP solutions with the concentration 35%. The PVP solutions and CS solutions were mixed at a mass ratio of 90:10 to prepared CS / PVP nanofibers,al-tering the electrospinning voltage,speed and tip-to-collector distance. The surface morphology of nanofibers was observed with scan e-lectric microscope( SEM). The results show that the fiber morphology and diameter is affected more clearly by electrospinning voltage, however the speed and tip-to-collector distance have comparatively little impact in the electrospinning process parameters selected. The process parameters are better when electrospinning voltage at 18 kV,distance at 12 cm and speed at 0. 2 mL/h.%为研究静电纺丝工艺对CS／PVP纳米纤维膜纤维形貌和直径的影响，以甲酸为溶剂配制质量分数为4%的CS溶液，以无水乙醇为溶剂配制质量分数为35%的PVP溶液，将PVP溶液与CS溶液按质量比90：10混合，搅拌均匀作为纺丝液，调节纺丝电压、接受距离和纺丝速率分别制备纳米纤维，借助扫描电镜（ SEM）观察制备的纳米纤维形貌．结果表明，在选定的纺丝工艺参数中，纺丝电压对纤维的形貌和直径影响较大，而纺丝速率和接受距离对纤维的形貌和直径影响相对较小；当纺丝电压为18 kV、接受距离为12 cm、纺丝速率为0．2 mL／h时，纤维形貌较好．