Three-dimensional macroporous hybrid carbon aerogel with heterogeneous structure derived from MXene/cellulose aerogel for absorption-dominant electromagnetic interference shielding and excellent thermal insulation performance

Zong, Ze; Ren, Penggang; Guo, Zhengzheng; Wang, Jin; Chen, Zhengyan; Jin, Yanling; Ren, Fangfang

doi:10.1016/j.jcis.2022.03.136

Cited by 69 publications

(21 citation statements)

References 79 publications

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“…The Raman spectra display a D band near 1350 cm -1 , corresponding to the disordered structure of amorphous carbon, Figure 4. The D-band presence corroborates the existence of defects that will become dipole polarization centers 2,16,69 . Thus, the dominant dielectric loss mechanism stems from interfacial polarization, dipole polarization, multiple reflections, and conduction loss 70 .…”

Section: Samplementioning

confidence: 55%

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Medeiros

Silva

et al. 2022

Mat. Res.

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Carbonaceous porous materials are strong candidates for producing low-cost, lightweight, and sustainable electromagnetic (EM) absorbing materials. This work investigates the production of radarabsorbing materials (RAM) by a simple method. Sustainable carbon xerogel (CX) was synthesized from tannin, a biosourced molecule. CX and commercial carbon nanotube (CNT) were embedded in a silicone matrix at proportions of 10 and 15 wt.% of CX and 0.1 wt.% of CNT to produce flexible composites. The morphology and structure of the carbonaceous materials were evaluated by fieldemission scanning electron microscopy (FEG-SEM), Raman spectroscopy, X-ray diffraction (XRD), textural properties by N 2 adsorption-desorption isotherms, and mercury porosimetry. The electromagnetic characterization of the composites was analyzed by a vector network analyzer (VNA) in the Ku-band. The results demonstrated that an increased concentration of CX in the composite improved reflection loss reaching -43.19 dB at 13.79 GHz.

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Section: Samplementioning

confidence: 55%

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Medeiros

Silva

et al. 2022

Mat. Res.

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“…Hydrofluoric acid is used to remove the Al layers from the MAX phase (Ti 3 AlC 2 ) to produce MXene, which has more stable Ti–C layers bound by ionic, metal, and covalent connections and numerous reactive functional groups . MXene shows remarkable effectiveness as a multifunctional additive with fascinating physical and chemical properties, which has potential applications in the fields of electromagnetic shielding, smart sensors, catalysis, etc. At the same time, some scholars have gradually paid attention to the thermal stability, high specific surface area, and metal catalytic activity of MXene and believe that it has potential to become an effective flame-retardant filler, which is also conducive to the development of high-performance polymer composites. − Gong et al showed that incorporating 1% MXene into the EP matrix can reduce the peak heat release rate (PHRR) and peak smoke release (PSPR) rate of EP by 24.1 and 34.6%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Luo

Gong

Pan

et al. 2022

ACS Appl. Nano Mater.

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Thermosetting epoxy resin (EP) has a high fire hazard that generates a lot of heat and toxic fumes, which is considered a prominent drawback that limits the practical application of EP. Therefore, inspired by the column-to-beam architecture, the BN-PDA-MXene nanohybrid was developed via covalent cross-linking and hydrogen bonding. The results showed that the stable column-to-beam architecture not only prevented the stacking of 2D nanosheets but also built a labyrinth-type array in the EP matrix, which was beneficial to enhancing the thermal stability and flame-retardant performance of EP composites. In particular, with the addition of the 2% BN-PDA-MXene nanohybrid, the maximum mass loss rate (MLRmax) of the EP composite was reduced and the char residue increased. Meanwhile, compared with pure EP, there was a marked reduction of 22.2% in the peak heat release rate, demonstrating the suppressed heat release. Furthermore, EP/BN-PDA-MXene had excellent smoke suppression performance, which was mainly reflected by the downward trend of the peak smoke production rate, total smoke production, and peak CO production rate, together with an obvious reduction of 39.9% in smoke factor. By studying the char residue, it was confirmed that the BN-PDA-MXene nanohybrid had a certain inhibitory effect on the fire hazard of EP due to its lamellar barrier effect, as well as the catalytic detoxification and catalytic carbonization of transition elements.

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“…Zhang et al proposed a flexible and transparent material with a 90% absorption range in 7.7–18 GHz, and the emissivity about 0.23 . Nowadays, bispectrum (microwave and IR) shielding multifunctional materials, whether based on conventional materials or MMAs, still struggle to satisfy both ultralow IR emissivity, optical transparency, flexibility, g s ≥ 1, and SE R < 3.01 − in the sub-6G band.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Green Electromagnetic Interference Shielding Material for the Sub-6-GHz Band

Jiang

Zhu

et al. 2022

ACS Appl. Electron. Mater.

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Multifunctionality, green, flexibility, and low reflectivity are promising development tendencies of electromagnetic interference (EMI) shielding materials. However, it is still a challenge to effectively integrate multiple functions into a single material. Herein, we reported a multifunctional, green, and flexible EMI shielding material with low reflection. It is a multilayer structure consisting of a low-infrared emission layer, a polyvinyl chloride (PVC) compensation layer, and a microwave absorption layer. The shielding effectiveness (SE) of the proposed multifunctional material can reach above 28 dB with a green index g s ≥ 1 and reflection loss SE R < 3.01 dB in the sub-6 GHz band. Furthermore, an ultralow infrared (IR) emissivity of 0.17 within the 3–15 μm spectrum is obtained by optimizing the pattern of the indium tin oxide (ITO) part. The designed material is also optically transparent, flexible, wide-angle, low-profile, and polarization-insensitive. Excellent consistency between the experimental and simulation results demonstrates that this multifunction shielding material can find practical applications in signal shielding scenarios in the sub-6G microwave and 3–15 μm infrared regimes.

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Three-dimensional macroporous hybrid carbon aerogel with heterogeneous structure derived from MXene/cellulose aerogel for absorption-dominant electromagnetic interference shielding and excellent thermal insulation performance

Cited by 69 publications

References 79 publications

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Column-to-Beam Architecture Inspires Interface-Engineered MXene Nanosheet/Boron Nitride Nanosheet/Polydopamine Hybrids for Fire Retardants

Multifunctional Green Electromagnetic Interference Shielding Material for the Sub-6-GHz Band

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