纳米纤维束的制备及力学性能研究

采用静电纺丝法制备出了纳米级、亚微米级纤维,采用尖角圆盘收集成具有定向排列的单向纤维束,考察了圆盘转速对纤维定向性的影响.为提高纤维的强度和模量,对收集到的纤维束进行了热处理、拉伸、加捻、定型等后处理工艺,再将多股定型的纤维束编织成线.研究了上述工艺参数对纤维束力学性能的影响,选取最佳工艺参数编织纤维束,并研究了编织线的力学性能.良好的性能预示其在纺织、生物医学等领域具有潜在的应用前景.

Fabrication of braided wires from aligned nanofibers and analysis of their mechanical performance

PU nanofibers were fabricated by means of electrospinning and were collected undirectionally using a rotating disk. The relationship between a rotating speed and fiber alignment was studied.The collected fiber bundles were post process- ing treated using the techniques such as heating,stretching,twisting,and preforming,before they were made into a braided wire .Optimal post processing parameters were obtained in order to achieve the highest mechanical properties for the fiber bundles.It was shown that the b...