石墨烯纳米带作为复合纤维和织物的填充物具有广阔前景

Graphene nanoribbon as promising filler of composite fibers and textiles

石墨烯纳米带(GNR)/碳复合纳米纤维纱是由氧化石墨烯纳米带(GONR)/聚丙烯腈(PAN)复合物静电纺,然后成功地进行加捻和碳化制得的。电子显微照片分析显示在静电纺纤维中均匀分布的纳米带沿纤维轴向高度取向。低质量分数的GONR提高了聚合物复合纳米纤维纱的力学性能。此外,碳化过程会显著增强力学和导电性能。目前,对GNR/碳复合纳米纤维的优化还没有完成。人们希望通过优化静电纺丝的条件(如在纺丝溶液中添加更多的分散均匀的或更大长径比的GONR)及碳化条件来获得更好的物理性能。GNR复合(纳米)纤维和织物可以用来增强轻质复合物。GNR/碳复合物尤其可用作燃料电池、蓄电池、超级电容器、纤维和织物型太阳能电池中的高性能电极,也可用于柔性和可穿戴的电子器件及可植入的医用设备。

The fabrication of graphene nanoribbon（GNR）/carbon composite nano-fiber yarns by electrospinning of graphene oxide nanoribbon（GONR）/PAN composites,followed by successive twistive and carbonization are demonstrated,the electron micrograph analysis showed that the welldispersed nanoribbons were highly oriented along the fiber axis in the electrospun fibers.A low weight fraction of the GONR improved the mechanical properties of the polymer composite nanofiber yarns.In additon,carbonization significantly enhanced the menchanical and electrical properties. At present,the optimization of the GNR/carbon composite nanofibers is not accomplished.It is expected that better physical properties can be attained by optimization of spinning conditions（e.g.spinning solutions containing a higher content of well-dispersed GONR or higheraspect-ratio ones）and carbonization conditions.The GNR composite（nano-）fibers and textiles could be applied to reinforcements for lightweight composites.In particular,GNR/carbon composites could be utilized for high-performance electrodes for fuel cells,secondary batteries and supercapacitors,fiber and textile-shaped solar celles,including flexible and wearable electronic devices and implantable medical devices.