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

建立了应用纳米技术的纳米纤维的制造和测试系统。通过静电纺丝，纳米纤维有可能制成直径为50-1000 nm的纤维。本研究使用了丙烯腈、聚苯乙烯和聚丁二烯三种不同特性的聚合物。通过调节聚合物的电压和溶液浓度可以制得纳米纤维。外加电压为10-30KV，容易得到高取向纳米纤维。溶液浓度强烈依赖于聚合物的相对分子质量。结果表明，用高相对分子质量的聚合物很容易得到直径较小的纳米纤维。当聚合物的相对分子质量和溶液浓度较低时，它变成了一滴而不是纤维。此外，从喷嘴的点到目标的距离应该很短。当溶液的电导率较高时，易制得纤维。测试了这些纤维的力学性能和导电性能。利用该方法对纳米纤维的单向力学性能进行了测试。结果表明，纤维的扭转强度和弹性模数能很好地反映纤维的特性。本拉伸试验设备可能是在感光、温升、扭转设备上加装湿度控制箱，后按常规扭转测试设备。而且，通过对放大器和传感器头进行纳米级的改进，使横向压缩特性变得非常容易。

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.