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采用熔融静电纺丝技术制备聚丙烯(PP)超细纤维,运用高速摄影技术记录了PP熔融纺丝液在高压静电场力作用下拉伸成丝的整个过程,并借助扫描电子显微镜(SEM)对不同静电压条件下所制备的PP超细纤维进行表征。实验表明,熔融静电纺射流运动大致可以分为稳定直线、分裂鞭动和沉积3个阶段。随静电压的增加,纺丝射流速度以及射流稳定直线运动区域增加,所制备纤维直径明显降低。
The melt spinning process was used to prepare polypropylene (PP) ultrafine fibers. The high-speed photographic technique was used to record the whole process of PP melt spinning under tension of high voltage electrostatic field. Scanning electron microscopy (SEM) The PP microfibers prepared under different static voltage conditions were characterized. Experiments show that the melt electrospinning jet movement can be divided into stable straight line, split whip and sedimentation three stages. With the increase of electrostatic voltage, the velocity of the spinning jet and the area of steady linear movement of the jet increased, and the diameter of the prepared fibers decreased obviously.