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以竖直旋转的细铜针为接收器,聚乙烯基吡咯烷酮(PVP)/无水乙醇质量分数为10%,电压25 kV,在不同的旋转速度下纺出了PVP螺旋纤维绳.当竖直细铜针固定不转时,纺丝纤维呈松散线状结构;竖直细铜针旋转速度加快,纤维形态由松散的螺旋缠绕向紧密缠绕的趋势变化,PVP纤维在纺丝针头和接收铜丝间静电库仑引力(垂直方向),纺出纤维间的库仑斥力(水平方向),以及铜针高速旋转力(切线方向)的三重作用下,最终制得PVP螺旋微米纤维绳.用扫描电子显微镜(SEM)对其进行表征.实验结果表明,接收器旋转速度和接收距离对多螺旋结构纤维的形貌有显著影响.讨论了螺旋纤维的形成机理.
The PVP spiral fiber rope was spun at different rotation speed with the vertical copper fine needle as the receiver and the mass fraction of polyvinylpyrrolidone (PVP) / absolute ethanol was 10% and the voltage was 25 kV. When the thin copper needle fixed does not turn, the spinning fiber has a loose linear structure; the vertical fine copper needle rotates faster, the fiber shape changes from loose spiral winding to tight winding, and the PVP fiber is in the spinning needle and the receiving copper wire PVP spiral micrometer fiber rope was finally obtained under the triple action of electrostatic Coulomb attraction (vertical direction), Coulomb repulsion (horizontal direction) of the spun fiber and high speed rotation force of copper needle (tangential direction) .Using scanning electron microscopy SEM.The results show that the rotational speed of the receiver and the receiving distance have a significant effect on the morphology of the multi-helical fiber.The formation mechanism of the helical fiber is discussed.