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With increasing demands on electromagnetic interference (EMI) shielding, considerable efforts have been devoted to realizing viable EMI shielding materials with processability and stability. Here, we report the first example of a large-scalable, ultrastable, and transparent film based on conductive metal–organic frameworks (cMOFs) for EMI shielding. A cobalt-based cMOF is uniformly grown on a direct-spun double-walled carbon nanotube film (DWNTF), maximizing both conductivity and EMI shielding effectiveness (SE). Furthermore, the hybrid films preserve their high EMI SE under long-term exposure, high temperature, repeated mechanical bending, and even immersion in artificial seawater, which is the most detrimental operating condition for EMI shielding materials. This report can offer new design guidance for viable EMI shielding materials by integrating scalability and stability with high EMI SE. [ABSTRACT FROM AUTHOR]

Carbon nanotube fiber (CNTF), prepared by the direct-spinning method, has several nanopores, and the infiltration behavior of resins into these nanopores could influence the mechanical properties of CNTF-based composites. In this work, we investigated the infiltration behavior of resin into the nanopores of the CNTFs and mechanical properties of the CNTF-based single-fiber composites using six epoxy resins with varying viscosities. Epoxy resins can be easily infiltrated into the nanopores of the CNTF; however, pores appear when a resin with significantly high or low viscosity is used in the preparation process of the composites. All the composite fibers exhibit lower load-at-break value compared to as-densified CNTF, which is an unexpected phenomenon. It is speculated that the bundle structure of the CNTF can undergo changes due to the high affinity between the epoxy and CNTF. As composite fibers containing pores exhibit an even lower load-at-break value, the removal of pores by the defoaming process is essential to enhance the mechanical properties of the composite fibers. [ABSTRACT FROM AUTHOR]

Hydrogen-bond-driven 1D assembly of carbon nanotubes dispersed in organic solvents remains challenging owing to difficulties associated with achieving high oxidation levels and uniform dispersion. Here, we introduced a bioinspired wet-spinning method that utilizes highly oxidized single-walled carbon nanotubes dispersed in organic solvents without superacid or dispersants. By incorporating submicrometer-sized graphene oxide nanosheets, we facilitated the ejection of 1.5 wt % spinning dopes, which formed an interconnected network via hydrogen bonding during coagulation. In this process, swollen carbon nanotube fibers from a multihole spinneret were merged into a single filament via interdigitation, similar to the process observed in spider silk spinning. The resulting interdigitated and conducting carbon nanotube fibers with hierarchical structures serve as versatile textile electrodes in applications such as sensitive textile gas sensors and excellent textile supercapacitors, exhibiting a capacitance of 320 F g -1 at an extremely high current density of 32 A g -1 . We establish a robust platform for textile electronics, highlighting the significant potential of our bioinspired approach.