Ultrastrong Hybrid Fibers with Tunable Macromolecular Interfaces of Graphene Oxide and Carbon Nanotube for Multifunctional Applications

Abstract

Individual carbon nanotubes (CNT) and graphene have unique mechanical and electrical properties; however, the properties of their macroscopic assemblies have not met expectations because of limited physical dimensions, the limited degree of dispersion of the components, and various structural defects. Here, a state‐of‐the‐art assembly for a novel type of hybrid fiber possessing the properties required for a wide variety of multifunctional applications is presented. A simple and effective multidimensional nanostructure of CNT and graphene oxide (GO) assembled by solution processing improves the interfacial utilization of the components. Flexible GOs are effectively intercalated between nanotubes along the shape of CNTs, which reduces voids, enhances orientation, and maximizes the contact between elements. The microstructure is finely controlled by the elements content ratio and dimensions, and an optimal balance improves the mechanical properties. The hybrid fibers simultaneously exhibit exceptional strength (6.05 GPa), modulus (422 GPa), toughness (76.8 J g–1), electrical conductivity (8.43 MS m–1), and knot strength efficiency (92%). Furthermore, surface and electrochemical properties are significantly improved by tuning the GO content, further expanding the scope of applications. These hybrid fibers are expected to offer a strategy for overcoming the limitations of existing fibers in meeting the requirements for applications in the fiber industry.

Ultrahigh strength and modulus of polyimide-carbon nanotube based carbon and graphitic fibers with superior electrical and thermal conductivities for advanced composite applications

“…The resulting graphite-like layers led to an increase in the void thickness owing to folding, splitting, or tilting [47]. This deteriorated the tensile strength of the fibers, as reported in a previous study [48,49]. It is confirmed that the tensile strengths of the fibers heat-treated at 2,700 • C are lower than those of the fibers heat-treated at 1,400 • C at the same PI content (Fig.…”

Bioinspired gradient-structured wood interfaces achieving efficient ion diffusion to generate electricity from natural evaporation

“…However, for the Warburg impedance, the high knee frequency is desirable for materials in favour of power generation. 38,39 It should be noted that there may be a trade-off between electrical conductivity and electrochemical performance. Therefore, the structural and electrochemical properties of the Ml-GO/CNT interface can be specically tailored by adjusting the interfacial ratio of GO to CNT NFMs.…”

Simultaneously enhanced tenacity, rupture work, and thermal conductivity of carbon nanotube fibers by raising effective tube portion

“…On SS-CNTFs with LD ~ 0.19 tex with heating to 1700°C, they achieved high tenacity (3.84 N tex −1 ) and thermal conductivities (482 W m −1 K −1 ), although the ductility and work of rupture are partially sacrificed. The last article used the CNT and graphene oxide hybrid liquid crystal solution to produce hybrid fibers ( 40 ). They believe that the flexible graphene oxides intercalate between nanotubes, which maximizes the contact between elements.…”