论文部分内容阅读
探究了由导电聚丙烯(PP)芯层和具有压电效应的聚偏氟乙烯(PVDF)皮层组成的双组分纤维的熔融纺丝过程。以往具有压电效应的PVDF被开发成传感器单丝。由于PP中掺杂了碳纳米管,因而纤维芯材可以导电。皮材的压电效应基于纤维在牵伸卷绕过程中β相所形成的全反式构象。通过广角X射线衍射(WAXD)分析纤维的皮芯结构,发现碳纳米管在聚合物基体中的分散状况会影响芯材的导电性,因此用透射电子显微镜(TEM)观察了碳纳米管在聚合物基体中的分布情况,纤维直径(皮、芯部分)的变化采用光学显微镜观察,并用流变仪测定了材料的黏度,用电感电容电阻测试仪(LCR)检测了芯材的比电阻。
The melt spinning process of bicomponent fibers consisting of a conductive polypropylene (PP) core and a polyvinylidene fluoride (PVDF) skin having a piezoelectric effect was explored. PVDF, which has a piezoelectric effect in the past, has been developed as a sensor monofilament. Because PP is doped with carbon nanotubes, the fiber core can be electrically conductive. The piezoelectric effect of the skin material is based on the all-trans conformation formed by the β phase of the fiber during the drawing and winding process. By analyzing the core-sheath structure of the fibers by WAXD, it was found that the dispersion of the CNTs in the polymer matrix affected the conductivity of the core material. Therefore, it was observed by transmission electron microscopy (TEM) The changes of fiber diameter (sheath and core) were observed by optical microscope. The viscosity of the material was measured by rheometer. The specific resistance of the core was measured by inductive capacitance resistance tester (LCR).