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Delaminated Ti 3 C 2 T x (D-Ti 3 C 2 T x ) MXene films exhibit excellent electrochemical and electromagnetic interference (EMI) shielding performance. However, the low yield and easy oxidation of D-Ti 3 C 2 T x nanosheet limit its commercial application. Herein, the flexible green multilayered Ti 3 C 2 T x /hydroxyethyl cellulose (M-Ti 3 C 2 T x /HEC) composite film was successfully fabricated through...
Since various criteria including effective absorption intensity, broad absorption bandwidth, sufficient mechanical properties and excellent stability are required to meet the benchmark in practical service, here we propose a novel strategy to fabricate strong and thermostable polymeric graphene/silica textile composites for practical microwave absorption applications. For achieving homogeneous configuration,...
For extending graphene aerogels for broad applications, here we demonstrate a simple and universal approach for scalable fabricating novel dual carbon three-dimensional (3D) hybrid structures, where the interspace of a 3D carbon texture has been modified by in situ generating graphene aerogels. Owing to the unique exceptional 3D carbon bi-frameworks of enhanced electrical conductivity and flexibility,...
We have demonstrated a highly ordered porous carbon (HOPC) as an effective electromagnetic absorber. The unique porous structures allow HOPC to possess high surface area and establish effective three-dimensional (3D) conductive interconnections at very low filler loading, which is responsible for effective electrical loss in terms of dissipating the induced current in the corresponding wax composites...
Multi-wall carbon nanotubes (MWCNTs) were oxidized by soaking in mixed acids. Their microstructure and composition were characterized using transmission electron microscopy, atomic force microscopy, Raman spectroscopy and infrared spectroscopy. The influence of soaking time on microstructure and dispersibility of the cut MWCNTs in aqueous solution was investigated. Results show that the MWCNTs were...
Multilayer graphene/polymer composite films with good mechanical flexibility were fabricated into paraffin-based sandwich structures to evaluate electromagnetic interference (EMI) shielding. Experimental results showed the relationship between electrical properties and shielding performance, demonstrating that electrical properties are significant factors in EMI shielding. Calculation based on electrical...
SiO 2 -matrix composites filled with 2, 5 and 10wt.% multiwalled carbon nanotubes (MWCNTs) were prepared to evaluate the dielectric properties and microwave attenuation performances over the full X-Band (8.2–12.4GHz) at a wide temperature ranging from 100 to 500°C. On the basis of the conductivity induced by the structure of the MWCNT, the transport of migrating and hopping electrons in the...
The dielectric spectroscopy of short carbon fiber/silica composite in the frequency range from 8.2 to 12.4GHz at temperatures between 30 and 600°C has been performed. The composite was prepared by conventional ceramic processing. The real part of the permittivity increases with increasing temperature, which is attributed to the shortened relaxation time of electron polarization, and the imaginary...
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