静电纺丝法制备PVP纳米纤维绳的研究

采用双针尖平行放置的一对细小铜针作为接收装置,聚乙烯基吡咯烷酮(PVP)无水乙醇质量分数为10%,电压25kV,在不同的旋转数下纺出了PVP纳米纤维绳.在电纺丝喷丝针头和接收铜针间的静电库仑引力,以及纺丝间库仑斥力的双重作用下,电纺出PVP纳米纤维,纺丝电源中断后,一端的铜针固定,另一端作高速旋转,在接收器铜针的高速旋转下最终制得PVP纳米纤维绳.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纤维结构的形貌有显著影响.讨论了纳米纤维的形成机理.

Preparation of PVP Fiber Rope by Electrospining

Two parallel upright copper threads were used as the acceptors.Poly(vinyl pyrrolidone) (PVP) sol (10 % in ethanol) was electrospun at the voltage of 25 kV.Fibre rope of PVP was fabricated with the rotation speed of 0～600 r/min. The Coulomb attracting force (in the vertical direction due to the static fields between the jet and the copper thread)and the Coulomb excluding force between the spinning fibers (in the horizontal direction) are the two main factors to form the fibers. During the power off, one copper thread was rotted at hight speed to spin the fiber rope. The morphologies of helical fiber were observed by scanning electron microscopy (SEM).Experimental results show that the distance between the two parallel upright copper threads has a significant impact on the morphology.The formation mechanism of fiber rope was discussed.