Design of high performance fibre using nanotechnology and elucidation of its arisotropy mechanical property

建立了以下内容：应用纳米技术和测量系统的纳米纤维制造。利用静电纺丝技术制备直径为50- 1000 nm的纳米纤维成为可能。本研究中使用了丙烯腈、聚苯乙烯和聚丁二烯三种不同特性的聚合物。纳米纤维可以通过调节电压和聚合物的溶液浓度来制备。施加电压为10- 30 kV时，容易得到高度取向的纳米纤维。溶液浓度强烈依赖于聚合物的分子量。实验证明，高分子量聚合物容易得到直径较小的纳米纤维。当聚合物分子量和溶液浓度较低时，它变成液滴而不变成纤维。此外，从喷嘴的点到目标的距离应该短。当溶液的电导率高时，纤维易于制备。测试了这些纤维的力学性能和导电性能。通过使用这些来测量纳米纤维的单向机械性能。研究结果表明，扭转强度和弹性模量能显著反映纤维的特性。拉伸试验可在增敏试验设备中进行，温度、扭转试验设备配有湿度控制箱，扭转后按常规试验设备进行。而且，通过对放大器和传感器头进行纳米级的横向压缩特性的改进，这一事实变得容易测量。

The following were established : Manufacture of nano fiber, which applied the nano-technology and the measuring system. It became possible that the nano fiber made the fiber of 50-1000nm diameters by the electro spinning process. Polymer with a different three kinds of characteristics of an acrylic nitrile, the polystyrene, and polybutadiene was used in this research. The Nano fiber can be made by adjusting a voltage and the solution concentration to polymer. Applied voltage was 10-30kV, and the high oriented nano fiber was easy to be obtained. The solution concentration is strongly dependent on molecular weight of the polymer. It was proven that the nano fiber in which small diameter was easy to be got from high molecular weight polymer. It became a drop without becoming a fiber when polymer molecular weight and the solution concentration were low. Moreover, the distance from the point of the nozzle to the target should be short. When the electric conductivity of the solution was high, the fiber was made easily. Mechanical characteristic and conduction characteristic of these fibers were measured. A unidirectional mechanical property of the Nano fiber was measured by using these. It was proven that the characteristic of the fiber was remarkably reflected for torsional strength and elastic modulus.Total of three twisting tester was produced by this research. The tensile test is possible testing equipment in sensitization, temperature, torsion equipment with humidity control box, after the torsion of testing equipment by the convention. And, the fact became measurably easy by the improvement on amplifier and sensor head in the nano order for the transverse compression characteristic.