Fabrication of extended-chain crystal nanofibers by electrospinning technique

静电纺丝技术在纳米技术的各个领域都受到了广泛的关注，其中需要具有高度取向的内部结构的纳米纤维，最终是伸展链晶体（ECC），以实现最佳的机械和物理性能。在这项研究中，提出了一种新的拉伸技术，并应用于聚乙烯（PE），和所得的纤维结构进行了研究。在该技术中，由平行电极收集器系统产生的静电拉伸力作用于湿纤维。首先，我们开发了一种合适的纺丝系统，该系统能够稳定地从高温溶液中进行纺丝，并通过控制环境温度来控制溶剂的蒸发速率。电子衍射分析表明，形成了高度取向的纤维结构，这被认为是由ECC的主要组成。此外，我们还研究了这种高取向结构的形成机理。

Electrospinning has been attracting much attention in various fields regarding nanotechnology, in which the nanofibers with highly oriented inner structure, ultimately the extended-chain crystal (ECC), are required to achieve the best performance of mechanical and physical properties. In this study, a novel stretching technique is proposed and applied to polyethylene (PE), and the resultant fiber structure was investigated. In the technique, an electrostatic stretching-force, created by a parallel-electrode collector system, acts on the wet fibers. First, we developed an appropriate spinning system, which enables to make spinning from high-temperature solution stably and to control the evaporation rate of solvent by controlling the environmental temperature. Electron diffraction analysis revealed the formation of highly oriented fiber structure, which is considered to be composed of the ECC mainly. In addition, we have studied the formation mechanism of such highly oriented structure.