材料期刊网

提出了一种有序静电场纺丝技术,用于直接、连续、可控地沉积聚合物纳米纤维。采用内径为100μm的注射器针尖作为喷丝头,聚合物溶液的供应方式和钢笔中墨水的供应方式相似。将喷丝头与收集器间的距离减小到几毫米,从而得到稳定的射流,以实现有序的纳米纤维沉积。通过一个X-Y平台来控制收集器在平面内的运动轨迹和运动速度,制备了各种聚氧化乙烯（PEO）纳米纤维图案,例如间距可控的平行和方格纳米纤维图案、字母‘O’和‘N’。采用扫描电子显微镜（SEM）对制备的PEO纳米纤维的形貌进行了观察。PEO纤维的直径为100-500nm,并且可以通过改变静电场纺丝的工艺参数来控制纤维的直径。这种技术使得静电纺丝成为直接写纳米制造技术的一种潜在工具,从而应用于各种纳米器件的制造,如纳米发电机、纳米传感器、纳米执行器和纳米流体器件。

An orderly electrospinning technique was developed to deposit polymer nanofibers in a direct,continuous,and controllable manner.A syringe needle with 100-μm inner diameter was used as spinneret and the polymer solution was supplied in a manner analogous to that of ink in a pen.The distance between spinneret and collector was decreased to a few millimeters to achieve stable polymer jet,thus enabling orderly deposition of nanofibers.Using an X-Y stage to control the trajectory and moving speed of the collector,we fabricated various poly（ethylene oxide）（PEO） nanofiber patterns,such as parallel and grid-patterns with controlled pitch,characters ＇O＇ and ＇N＇.Scanning electron microscopy（SEM） was used to investigate the morphology of deposited PEO nanofiber.PEO nanofiber diameter ranged from 100 to 500nm,and the fiber diameter could be controlled by adjusting electrospinning parameters.This technique makes electrospinning a potential tool in direct-write nanofabrications,such as nanogenerator,nanosensor,nanoactuator and nanofluidic devices.