High-Performance Electromagnetic Wave Absorbing CNT/SiC_f Composites: Synthesis, Tuning, and Mechanism

Abstract

High-performance electromagnetic (EM) wave absorbing materials are strongly desired in many fields like portable devices and aircraft. Introducing carbon nanotubes (CNTs) to certain materials has been proved to be an effective method leading to good EM wave absorption capability. In this work, CNTs are successfully synthesized on SiC fibers with high speed by using a newly developed method which is far more efficient than the commonly used one. The obtained CNT/SiCf composites exhibit high-performance EM wave absorption capability. With 0.72 wt % CNTs, the reflection loss of the 4 mm composite with only 20 wt % filler loading reaches −62.5 dB with the broad effective absorption bandwidth of 8.8 GHz, covering almost the entire Ku band and three-quarters X band. Moreover, the composites can be added to varying matrices so as to modify their EM wave absorption and other properties. The EM wave absorption performance can be easily tuned in a wide range by varying the CNT content, thickness, and filler loading. This work offers a new route for efficiently synthesizing CNTs but, more importantly, for designing high-performance and multifunctional EM wave absorbing materials.

Construction of 1D Heterostructure NiCo@C/ZnO Nanorod with Enhanced Microwave Absorption

“…Figure 8 b is the correlation curve between attenuation coefficients and frequencies of all samples. With increasing frequency, all the curves show a significant change, but the attenuation system of S-5 is more prominent than that of other samples, which means that S-5 has a stronger attenuation ability to the incident EMW and shows better absorption performance, which conforms to our previous conclusion [ 64 ]. where d denotes the thickness of the absorber and μ 0 means vacuum permeability.…”

“…has a stronger attenuation ability to the incident EMW and shows better absorption performance, which conforms to our previous conclusion [64].…”

Retracted: Emerging 2D MXene/Organic Heterostructures for Future Nanodevices

“…[ 171 ] It is believed that enhanced EMI performances in such hybrids are attributed to the conductive network, dipolar and interfacial polarizations. [ 172,173 ] Hence, all these recent progress confirm that Ti 3 C 2 T x /organic hybrids are promising for the enhancement of EMI shielding. However, there are numerous MXenes and organic material and their potential as individual and hybrid forms including heterostructures for EMI shielding can be expanded.…”

Silk Sericin As a Green Adhesive to Fabricate a Textile Strain Sensor with Excellent Electromagnetic Shielding Performance

“…However, electromagnetic interference is becoming universal along with the extensive use of these electronic devices and rapid development of communication technology . Unfortunately, EMI not only interferes with the performance of electronics by causing false operations, but also gives rise to the deleterious effects on the environment and human health, especially from fifth generation communications . Although there is considerable research on various flexible sensors − or EMI shielding materials, ,, multifunctional sensors simultaneously with excellent EMI shielding performance have few concerns so far and remain still a huge challenge.…”