Study on broadband microwave absorbing performance of gradient porous structure

Luo, Fengji; Liu, Dongqing; Cao, Tao; Cheng, Haifeng; Kuang, Jiacai; Deng, Yingjun; Xie, Wei

doi:10.1007/s42114-021-00275-4

Cited by 125 publications

(34 citation statements)

References 30 publications

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“…In addition, abundant terminating functional groups and inherent defects of layered MXene will cause dipole polarization and defect polarization under high-frequency EM fields. Third, under the action of alternating EM fields, the Ni flower attenuated EM waves through natural resonance and exchange resonance [ 58 – 67 ]. Finally, the 3D porous network structure could increase the propagation path of microwaves in the foam, and the microwaves absorption efficiency could be improved after multiple reflection and scattering [ 68 ], while the microwaves also reflect and scatter between MXene and Ni flower.…”

Section: Resultsmentioning

confidence: 99%

Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth

Cheng

Pan

Wang³

et al. 2022

Nano-Micro Lett.

178

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The development of multifunctional and efficient electromagnetic wave absorbing materials is a challenging research hotspot. Here, the magnetized Ni flower/MXene hybrids are successfully assembled on the surface of melamine foam (MF) through electrostatic self-assembly and dip-coating adsorption process, realizing the integration of microwave absorption, infrared stealth, and flame retardant. Remarkably, the Ni/MXene-MF achieves a minimum reflection loss (RLmin) of − 62.7 dB with a corresponding effective absorption bandwidth (EAB) of 6.24 GHz at 2 mm and an EAB of 6.88 GHz at 1.8 mm. Strong electromagnetic wave absorption is attributed to the three-dimensional magnetic/conductive networks, which provided excellent impedance matching, dielectric loss, magnetic loss, interface polarization, and multiple attenuations. In addition, the Ni/MXene-MF endows low density, excellent heat insulation, infrared stealth, and flame-retardant functions. This work provided a new development strategy for the design of multifunctional and efficient electromagnetic wave absorbing materials.

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Section: Resultsmentioning

confidence: 99%

Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth

Cheng

Pan

Wang³

et al. 2022

Nano-Micro Lett.

178

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“…Moreover, M2-M5 still had excellent absorption performance; the RL min value of M2 could reach Furthermore, the microwave absorption abilities of the porous materials have been listed in Table 3. 38,39,[74][75][76][77] The above results show that the MA materials M1-M6 made by this novel strategy have effective microwave absorption performance. The absorption intensity, bandwidth and thickness can be effectively adjusted through the porosity of the monoliths.…”

Section: Polymer Chemistry Papermentioning

confidence: 66%

High performance microwave absorption of light weight and porous non-carbon-based polymeric monoliths via a gel emulsion template

Zhang

Song

et al. 2022

Polym. Chem.

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“…Gradient design is acknowledged as an effective strategy for improving the microwave absorption ability nowadays [ 40 ]. In order to reduce the thickness and improve the absorption performance of OCGAs further, the size distribution of cells is adjusted to obtain better impedance matching characteristics.…”

Section: Resultsmentioning

confidence: 99%

Ultralight Open-Cell Graphene Aerogels with Multiple, Gradient Microstructures for Efficient Microwave Absorption

et al. 2022

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Development of high-performance graphene-based microwave absorbing materials with low density and strong absorption is of great significance to solve the growing electromagnetic pollution. Herein, a controllable open-cell structure is introduced into graphene aerogels by the graphene oxide (GO) Pickering emulsion. The open-cell graphene aerogel (OCGA) with multiple microstructures shows a significantly enhanced microwave absorption ability without any additions. A high microwave absorption performance with the minimum value of reflection loss (RLmin) of −51.22 dB was achieved, while the material density was only 4.81 mg/cm3. Moreover, by means of centrifugation, the graphene cells were arranged by their diameter, and a gradient, open-cell graphene structure was first fabricated. Based on this unique structure, an amazing microwave absorption value of −62.58 dB was reached on a condition of ultra-low graphene content of 0.53 wt%. In our opinion, such excellent microwave absorption performance results from multiple reflection and well-matched impedance brought by the open-cell and gradient structure, respectively. In addition, the structural strength of the OCGA is greatly improved with a maximum increase of 167% due to the introduction of cell structure. Therefore, the OCGAs with the gradient structure can be an excellent candidate for lightweight, efficient microwave absorption materials.

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Study on broadband microwave absorbing performance of gradient porous structure

Cited by 125 publications

References 30 publications

Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth

Ni Flower/MXene-Melamine Foam Derived 3D Magnetic/Conductive Networks for Ultra-Efficient Microwave Absorption and Infrared Stealth

High performance microwave absorption of light weight and porous non-carbon-based polymeric monoliths via a gel emulsion template

Ultralight Open-Cell Graphene Aerogels with Multiple, Gradient Microstructures for Efficient Microwave Absorption

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