Abstract

Single-segment collectors, commonly used in electrospinning, distribute nanofibers randomly over their entire length. To improve the orientation of resultant nanofibers, a multi-segmented collector has been developed having alternate conducting and nonconducting segments. The alignment principle is based upon the attraction of nanofibers towards conductive segments, while the nonconductive segments, having least attraction for nanofibers, do not pull the fibers toward themselves. This causes the nanofibers to stretch over the nonconductive segments, thanks to attractive forces from the adjacent conductive segments. The best orientation was obtained on the cylindrical collector with 12.5 mm nonconductive segment length, 20 mm conductive segment length and 11% polymer concentration. Different polymeric materials can be electrospun on these types of multi-segmented collectors with high fiber orientation for various applications.

摘要

通常用于静电纺丝的单段收集器会将纳米纤维随机分布在其整个长度上。为了改善所得纳米纤维的取向，已经开发了具有交替的导电和非导电段的多段集电器。排列原理基于纳米纤维对导电段的吸引力，而对纳米纤维吸引力最小的非导电段则不会将纤维拉向自身。由于来自相邻导电段的吸引力，这导致纳米纤维在非导电段上拉伸。在具有12.5毫米非导电段长度，20毫米导电段长度和11％的聚合物浓度的圆柱形集电器上获得最佳取向。