CVD carbon-coated carbonized loofah sponge loaded with a directionally arrayed MXene aerogel for electromagnetic interference shielding

Li, Songtao; Wang, Jiashun; Zhu, Zhengwang; Chen, Lingxin; Li, Wanchong; Sui, Guoxin; Park, Chul

doi:10.1039/d0ta09337h

Cited by 59 publications

(27 citation statements)

References 40 publications

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“…As the heating continued, the surface of the aerogel gradually turned white, which was the performance of MXene oxidation into TiO 2 . 39 More importantly, the aerogel cannot ignite and, in contrast to the pure ANF aerogel (Fig. S12b†) and aTA-3 (Fig.…”

Section: Resultsmentioning

confidence: 95%

“…Because of the strong impedance mismatch between MXene and TiO 2 , more interface polarization was formed, causing TiO 2 to become an excellent microwave absorber. 29,39,41 Obviously, aTA-5 at 250 °C exhibited more degradation at a lower frequency. It may be explained that the shielding material conductive network was damaged, and the shielding performance decreased significantly in the lower frequency band with strong reflection dependence, while maintaining a high level of shielding performance in the high frequency band with strong absorption dependence.…”

Section: Resultsmentioning

confidence: 95%

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Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Jiang-yu

et al. 2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 95%

Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Jiang-yu

et al. 2022

J. Mater. Chem. A

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“…As shown in Figure 6 a , the zeolite derived AS glass has a compressive strength higher than 80 MPa, which is robust enough for most applications. The compressive strength is much better than many lightweight MACs [ 33 , 34 ] and even some porous ceramics, [ 35 ] considering the high porosity in the AS glass. The addition of Ti 3 C 2 T x nanosheets and Ni NPs seems to have no obvious influence on the compressive strength, indicating the load bearing capacity under compression is mainly determined by the porosity rather than microstructures.…”

Section: Resultsmentioning

confidence: 99%

A Robust Hierarchical MXene/Ni/Aluminosilicate Glass Composite for High‐Performance Microwave Absorption

Luo

Wang

et al. 2021

Advanced Science

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The 2D titanium carbide MXene with both extraordinary electromagnetic attenuation and elastic properties has shown great potential as the building block for constructing mechanically robust microwave absorbing composites (MACs). However, the weak thermal stability has inhibited the successful incorporation of MXene into the inorganic MACs matrix so far. Herein, an ultralow temperature sintering strategy to fabricate a hierarchical aluminosilicate glass composite is demonstrated by using EMT zeolite as starting powder, which can not only endow the composites with high sinterability, but also facilitate the alignment of MXene in the glass matrix. Accordingly, the highly oriented MXene and mesoporous structure can effectively reduce the conduction loss in the out‐of‐plane direction while maintaining its large polarization loss. Meanwhile, the in situ formed Ni nanoparticles via ion exchange serve as a synergistic modulator to further improve the attenuation capability and impedance matching of composite, resulting in a low reflection loss of −59.5 dB in X band and general values below −20 dB with a low fitting thickness from 4 to 18 GHz. More attractively, such a delicate structure also gives the composite a remarkable fracture strength and contact‐damage‐resistance, which qualifies the mesoporous glass composite as a structural MACs with a superior comprehensive performance.

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“…Li et al also used CVD to grow carbon-coated carbonized loofah sponge (CCLS)/MXene aerogel. [88] Dried chalina was cut into sponge pieces, and the latter was further prepared for CCLS through phenolic resin and carbonization. CCLS/MXene aerogel was built by CCLS and MXene solution using directional freeze-drying.…”

Section: Flame Retardancymentioning

confidence: 99%

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

et al. 2021

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With the rapid development of 5th Generation Mobile Communication Technology (5G), late-model electromagnetic wave absorbing and shielding (EMAS) materials have proven to be the research emphasis of electromagnetic (EM) wave shelter. Great efforts have been made to optimize EMAS functional materials for diverse EM wavebands. [1] Each range of EM wave bands has a specific application in communication, electrical engineering, or information transmission. [2] For instance, ultrahigh frequency (UHF) EM wave of 0.3 < f < 3 GHz, also known as P/L/S or B/C/D/E band, is applied to television radar air navigation and mobile communication as well as microwave relay systems; the superhigh frequency (SHF) EM wave of 3 < f < 30 GHz, including S/C/X/Ku/K/ Ka-band or F/G/H/I/J/K band, is customarily adopted in digital telecommunication and satellite communication as well as waveguide communication. Moreover, EM waves in other frequency ranges, like terahertz wave and gamma ray, have been widely used in label-free DNA detection, high-temperature superconducting material research, radiographic testing, and even oncotherapy. In these cases, each specific application scenario requires specific EM waves in a specific frequency range, illustrating that EM wave clutters should be absorbed or otherwise shielded. Under these circumstances, developing novel and practical EMAS materials may meet the demands of EM wave science, especially in multifunctional fields.Traditional EMAS materials consist of resistance absorber, [3] dielectric absorber, [4] magnetic medium absorber, [5] and composites based on monomaterials as mentioned earlier, [6] including CuS, [7] MoSe 2 , [8] ferrites and alloys (Co x Fe 3Àx O 4 @C), [9] modified carbons (hollow carbon spheres), [10] etc. In the past decade, 2D transition metal carbides or nitrides, or MXenes, have been prefabricated and naturally applied to EMAS materials synthesis due to their outstanding EM wave loss capacity. [11] Many scholars have devoted themselves to MXene materials and structure design. The electrical conductivity of MXenes can reach 10 3 S cm À1 , leading to extraordinary EM wave shielding property. [12] Many reported MXene absorbers are monolayers, [13] whereas macrostructure design is introduced. Thus, macrodevices, like hollow MXene sphere foam, [14] are synthesized. It is

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CVD carbon-coated carbonized loofah sponge loaded with a directionally arrayed MXene aerogel for electromagnetic interference shielding

Abstract: Sustainably regenerated, environmentally friendly, natural loofah sponge is promising to become a multi-functional bio-carbon material, especially in the field of electromagnetic shielding, due to its unique hierarchical structure. In this...

Cited by 59 publications

References 40 publications

Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

Ultralight, highly compressible, thermally stable MXene/aramid nanofiber anisotropic aerogels for electromagnetic interference shielding

A Robust Hierarchical MXene/Ni/Aluminosilicate Glass Composite for High‐Performance Microwave Absorption

A Novel Strategy in Electromagnetic Wave Absorbing and Shielding Materials Design: Multi‐Responsive Field Effect

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