Comparing with traditional methods, high speed centrifugal spinning has the advantages of simple fabrication principle and high preparation efficiency. In this study, the flow law of spinning solution in the nozzle and the effect of spinning parameters on the morphology of nanofibers were explored. A motion model of spinning solution in the nozzle was established to study the velocity distribution of spinning solution in the nozzle, moreover, the relationship between the critical rotational speed required to form the jet and the spinning parameters was studied. It was found that the current velocity of spinning solution was mainly concentrated at the axis of the nozzle and shifted in the direction of Coriolis acceleration. The relationship between spinning parameters and the critical rotational speed was verified. The critical rotational speed for forming the spinning jet was directly proportional to the spinning solution concentration and inversely proportional to the nozzle diameter. Polyoxyethylene (PEO) nanofibers were fabricated by selectively adjusting spinning parameters and characterized by using scanning electron microscopy (SEM). The results showed that the diameter distribution of nanofibers could be adjusted by changing the spinning parameters, such as spinning solution concentration, rotational speed, nozzle length, nozzle diameter and collection distance. The high speed centrifugal spinning has the potential to produce single continuous nanofibers efficiently.

与传统方法相比，高速离心纺丝具有制造原理简单，制备效率高的优点。本研究探讨了喷嘴中纺丝溶液的流动规律以及纺丝参数对纳米纤维形态的影响。建立了喷嘴内纺丝液的运动模型，研究了喷嘴内纺丝液的速度分布，并研究了形成射流所需的临界转速与纺丝参数之间的关系。结果发现，纺丝溶液的当前速度主要集中在喷嘴的轴线上，并在科里奥利加速度的方向上偏移。验证了纺丝参数与临界转速之间的关系。形成纺丝喷嘴的临界转速与纺丝溶液浓度成正比，与喷嘴直径成反比。聚氧乙烯（PEO）纳米纤维是通过选择性调节纺丝参数来制备的，并通过扫描电子显微镜（SEM）进行表征。结果表明，可以通过改变纺丝液浓度，转速，喷嘴长度，喷嘴直径和收集距离等纺丝参数来调节纳米纤维的直径分布。高速离心纺丝具有有效生产单根连续纳米纤维的潜力。聚氧乙烯（PEO）纳米纤维是通过选择性调节纺丝参数来制备的，并通过扫描电子显微镜（SEM）进行表征。结果表明，可以通过改变纺丝液浓度，转速，喷嘴长度，喷嘴直径和收集距离等纺丝参数来调节纳米纤维的直径分布。高速离心纺丝具有有效生产单根连续纳米纤维的潜力。聚氧乙烯（PEO）纳米纤维是通过选择性调节纺丝参数来制备的，并通过扫描电子显微镜（SEM）进行表征。结果表明，可以通过改变纺丝液浓度，转速，喷嘴长度，喷嘴直径和收集距离等纺丝参数来调节纳米纤维的直径分布。高速离心纺丝具有有效生产单根连续纳米纤维的潜力。