CAJ | 학술논문

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25 kV,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.
채용쌍침첨평행방치적일대세소동침작위접수장치,취을희기필각완동(PVP)무수을순질량분수위10%,전압25 kV,재불동적선전수하방출료PVP납미섬유승.재전방사분사침두화접수동침간적정전고륜인력,이급방사간고륜척력적쌍중작용하,전방출PVP납미섬유,방사전원중단후,일단적동침고정,령일단작고속선전,재접수기동침적고속선전하최종제득PVP납미섬유승.용소묘전자현미경(SEM)대기진행표정.실험결과표명,접수기선전속도화접수거리대다섬유결구적형모유현저영향.토론료납미섬유적형성궤리.
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.