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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Conductive twisted polyimide composite nanofiber ropes with improved tensile strength, thermal stability and high flexibility
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Conductive twisted polyimide composite nanofiber ropes with improved tensile strength, thermal stability and high flexibility

机译：导电捻掺杂复合纳米纤维绳，具有改进的拉伸强度，热稳定性和高柔韧性

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摘要

In this work, electrospun twisted polyimide (PI) nanofiber ropes with high conductivity, improved tensile strength, thermal stability and good flexibility have been successfully prepared by simply adsorbing carbon nanotubes (CNTs) on the surface of the PI nanofibers. Compared with the pure twisted PI rope (similar to 93.5 MPa), the twisted CNTs/PI ropes have an enhanced mechanical strength (116.2 MPa, stretched up to 16.7%). The as-prepared twisted CNTs/PI fibers can keep a stable morphology even at 400 degrees C. Furthermore, the CNTs/PI fibers exhibit outstanding electrical properties, and the temperature-dependent electrical conductivity follows variable-range-hopping (VRH) conduction law. The highest room-temperature conductivity of the rope is 0.324 S cm(-1), and the current-voltage (I-V) characteristic curves are linear even at 50K. Particularly, the resistance of the rope only has a slight change when being bonded from 0 degrees to 360 degrees, indicating that the composite rope has high stability and can have good performance in flexible environmental application. In addition, the functional twisted CNTs/PI rope has similar characteristics to ordinary thread which makes it applicable as invisible flexible wire in future intelligent clothing.
机译：在这项工作中，通过在PI纳米纤维的表面上吸附碳纳米管（CNT），通过简单地吸附在PI纳米纤维的表面上成功地制备了具有高导电率，改善的拉伸强度，热稳定性和良好柔韧性的耐电纺扭曲的聚酰亚胺（PI）纳米纤维绳。与纯扭曲的PI绳（类似于93.5MPa）相比，扭曲的CNT / PI绳索具有增强的机械强度（116.2MPa，高达16.7％）。即使在400℃下也可以保持稳定的形态。此外，CNT / PI纤维表现出卓越的电性能，并且温度依赖的电导率沿着可变范围跳跃（VRH）导通法。 。绳索的最高房间温度导电性为0.324 s cm（-1），即使在50k时，电流 - 电压（I-V）特性曲线也是线性的。特别地，当从0度键合到360度时，绳索的电阻仅具有轻微的变化，表明复合绳索具有高稳定性并且可以在柔性环境应用中具有良好的性能。此外，功能性扭曲的CNT / PI绳索具有与普通螺纹相似的特性，这使其在未来的智能衣服中适用于不可见的柔性电线。

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