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Expanded graphene oxide fibers with high strength and increased elongation

机译：具有高强度和伸长率的膨化氧化石墨纤维

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We report the role of chemically expanded graphite in the fabrication of high-performance graphene oxide fibers by wet spinning. X-ray diffraction peak showed that the interplanar distance of the expanded graphene oxide (EGO) fiber was more than that of graphene oxide (GO) fiber due to the expanded graphite. X-ray photon spectroscopy analysis revealed that EGO was more oxidized than GO. The hydrogen bonding network and secondary intermolecular interaction made the EGO aqueous solution more stable and crystalline, and it was able to be stretched in the coagulation bath. Morphological analysis showed the excellent alignment and compactness of EGO sheets in the fibers. The increased interplanar distance between the EGO sheets favored the edge-to-edge interaction more than the basal plane interaction within the fiber, thus resulting in high mechanical strength (492 MPa) and increased elongation (6.1%).
机译：我们报告了化学膨胀石墨在通过湿纺制造高性能氧化石墨烯纤维中的作用。 X射线衍射峰表明，由于石墨的膨胀，膨胀的氧化石墨烯（EGO）纤维的晶面间距大于氧化石墨烯（GO）纤维的晶面间距。 X射线光子光谱分析表明，EGO比GO更易被氧化。氢键网络和二次分子间相互作用使EGO水溶液更加稳定和结晶，并且能够在混凝浴中拉伸。形态分析表明，EGO片在纤维中具有出色的排列和致密性。 EGO薄板之间增加的晶面间距比纤维内的基面相互作用更有利于边缘到边缘的相互作用，因此导致较高的机械强度（492 MPa）和增加的伸长率（6.1％）。

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