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采用并列型静电纺丝法成功制备出新型的扭曲螺旋结构的复合微/纳米纤维。主要使用扫描电镜、SmileView图像分析软件对样品的微观形貌及结构进行了表征和分析。分析结果表明,高收缩性聚酯弹性体TPEE和相对收缩率较低的PBT,在并列型电纺过程中因断裂伸长率不同产生不同程度的收缩,从而形成三维扭曲螺旋结构的复合纤维。所得纤维是表面具有刺状突起的扭曲螺旋结构的复合微/纳米纤维,纤维直径约1μm,表面刺状突起约300nm。
A new type of composite micro / nanofibers with twisted helical structure was successfully prepared by side-by-side electrospinning. Mainly using scanning electron microscopy, SmileView image analysis software on the microscopic morphology and structure of the sample were characterized and analyzed. The results show that high-shrinkage polyester elastomer (TPEE) and relatively low-shrinkage PBT (PBT) have different degrees of elongation due to different elongation at break in the parallel electrospinning process, resulting in three-dimensional twisted helical fiber. The resulting fibers were twisted micro / nanofibers with twisted spines on the surface. The fiber diameter was about 1μm, and the surface thorn-like protrusions were about 300nm.